[CMake] Add option to switch default C++ stdlib

[Hahnfeld]

Summary

With this option one can set the default library to use if no -stdlib= is provided on compiler invocation (currently hard coded libstdc++ which remains default)
Also add explicit option -stdlib=libstdc++ to tests that require it and would fail when you choose libc++.

[Hahnfeld]

Any comments on this change?

[Hahnfeld]

ping

[beanz]

Is it correct to assume that all the test case changes are needed just to make the tests pass if you set CLANG_DEFAULT_CXX_STDLIB=libc++?

I'm not really comfortable approving this patch because I've made all of one or two changes ever to the driver, but I can try to pester someone else to take a gander. It doesn't look particularly invasive to me.

One comment inline.

lib/Driver/ToolChain.cpp

561–564

There are two cases where this line would get hit:

(1) If the stdlib arg is an invalid library, it falls through here after printing the diagnostic
(2) if CLANG_DEFAULT_CXX_STDLIB is itself an invalid library value

Can you add a configure-time or compile time check to catch case 2?

[rsmith]

The direction here generally seems fine to me.

lib/Driver/ToolChain.cpp

549–550

On Darwin, this default will be clobbered by the code in Darwin::TranslateArgs in ToolChains.cpp. On MIPS, this override will take no effect because GetCXXStdlibType is overridden.

Perhaps we could instead default CLANG_DEFAULT_CXX_STDLIB to "", and let the tool chain pick the default if it's neither specified at configure time nor on the command line.

[Hahnfeld]

Address reviewers' comments:

• check for valid CLANG_DEFAULT_CXX_STDLIB
• generalize for Darwin and Bitrig by introducing GetDefaultCXXStdlibType
• fallback to CLANG_DEFAULT_CXX_STDLIB if user choice is incorrect

[Hahnfeld]

In D15920#347352, @beanz wrote:

Is it correct to assume that all the test case changes are needed just to make the tests pass if you set CLANG_DEFAULT_CXX_STDLIB=libc++?

[...]

Yes, most of the tests check for the correct libstdc++ include paths which are not met with libc++.

lib/Driver/ToolChain.cpp

549–550

I have moved the behaviour from Darwin::TranslateArgs to Darwin::GetDefaultCXXStdlibType and added this method for Bitrig as well (which was straightforward). MIPS only allows libc++ so there is nothing the user can choose from...

I would have also liked to implement this for FreeBSD and NetBSD but their default library is dependent on the system version. While this wouldn't be a problem and could be implemented in GetDefaultCXXStdlibType, this would still be overriden by CLANG_DEFAULT_CXX_STDLIB which unfortunately fails the tests in test/Driver/{freebsd.c,netbsd.c}. Is it ok to leave this for now?

[beanz]

Everything about this looks reasonable to me.

Can you commit the test changes in a separate commit before committing the other changes? That way if something goes wrong the diff for the meat of the patch is a small diff.

[Hahnfeld]

In D15920#350401, @beanz wrote:

Can you commit the test changes in a separate commit before committing the other changes? That way if something goes wrong the diff for the meat of the patch is a small diff.

Committed seperately in rL260661, thanks.

CMakeLists.txt

 
 set(C_INCLUDE_DIRS "" CACHE STRING
   "Colon separated list of directories clang will search for headers.")
 
 set(GCC_INSTALL_PREFIX "" CACHE PATH "Directory where gcc is installed." )
 set(DEFAULT_SYSROOT "" CACHE PATH
   "Default <path> to all compiler invocations for --sysroot=<path>." )
 
+set(CLANG_DEFAULT_CXX_STDLIB "" CACHE STRING
+  "Default C++ stdlib to use (empty for architecture default, \"libstdc++\" or \"libc++\"")
+if (NOT(CLANG_DEFAULT_CXX_STDLIB STREQUAL "" OR
+        CLANG_DEFAULT_CXX_STDLIB STREQUAL "libstdc++" OR
+        CLANG_DEFAULT_CXX_STDLIB STREQUAL "libc++"))
+  message(WARNING "Resetting default C++ stdlib to use architecture default")
+  set(CLANG_DEFAULT_CXX_STDLIB "")
+endif()
+
 set(CLANG_DEFAULT_OPENMP_RUNTIME "libomp" CACHE STRING
   "Default OpenMP runtime used by -fopenmp.")
 
 set(CLANG_VENDOR "" CACHE STRING
   "Vendor-specific text for showing with version information.")
 
 if( CLANG_VENDOR )
   add_definitions( -DCLANG_VENDOR="${CLANG_VENDOR} " )

include/clang/Config/config.h.cmake

 /* This generated file is for internal use. Do not include it from headers. */
 
 #ifdef CLANG_CONFIG_H
 #error config.h can only be included once
 #else
 #define CLANG_CONFIG_H
 
 /* Bug report URL. */
 #define BUG_REPORT_URL "${BUG_REPORT_URL}"
 
+/* Default C++ stdlib to use. */
+#define CLANG_DEFAULT_CXX_STDLIB "${CLANG_DEFAULT_CXX_STDLIB}"
+
 /* Default OpenMP runtime used by -fopenmp. */
 #define CLANG_DEFAULT_OPENMP_RUNTIME "${CLANG_DEFAULT_OPENMP_RUNTIME}"
 
 /* Multilib suffix for libdir. */
 #define CLANG_LIBDIR_SUFFIX "${CLANG_LIBDIR_SUFFIX}"
 
 /* Relative directory for resource files */
 #define CLANG_RESOURCE_DIR "${CLANG_RESOURCE_DIR}"

include/clang/Config/config.h.in

 /* This generated file is for internal use. Do not include it from headers. */
 
 #ifdef CLANG_CONFIG_H
 #error config.h can only be included once
 #else
 #define CLANG_CONFIG_H
 
 /* Bug report URL. */
 #undef BUG_REPORT_URL
 
+/* Default C++ stdlib to use. */
+#undef CLANG_DEFAULT_CXX_STDLIB
+
 /* Default OpenMP runtime used by -fopenmp. */
 #undef CLANG_DEFAULT_OPENMP_RUNTIME
 
 /* Multilib suffix for libdir. */
 #undef CLANG_LIBDIR_SUFFIX
 
 /* Relative directory for resource files */
 #undef CLANG_RESOURCE_DIR

include/clang/Driver/ToolChain.h

virtual unsigned GetDefaultStackProtectorLevel(bool KernelOrKext) const {
     return 0;
   }
 
   /// GetDefaultRuntimeLibType - Get the default runtime library variant to use.
   virtual RuntimeLibType GetDefaultRuntimeLibType() const {
     return ToolChain::RLT_Libgcc;
   }
 
+  virtual CXXStdlibType GetDefaultCXXStdlibType() const {
+    return ToolChain::CST_Libstdcxx;
+  }
+
   virtual std::string getCompilerRT(const llvm::opt::ArgList &Args,
                                     StringRef Component,
                                     bool Shared = false) const;
 
   const char *getCompilerRTArgString(const llvm::opt::ArgList &Args,
                                      StringRef Component,
                                      bool Shared = false) const;
   /// needsProfileRT - returns true if instrumentation profile is on.

lib/Driver/ToolChain.cpp

 //===--- ToolChain.cpp - Collections of tools for one platform ------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 
 #include "Tools.h"
 #include "clang/Basic/ObjCRuntime.h"
+#include "clang/Config/config.h"
 #include "clang/Driver/Action.h"
 #include "clang/Driver/Driver.h"
 #include "clang/Driver/DriverDiagnostic.h"
 #include "clang/Driver/Options.h"
 #include "clang/Driver/SanitizerArgs.h"
 #include "clang/Driver/ToolChain.h"
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/StringSwitch.h"
if (Value == "libgcc")
       return ToolChain::RLT_Libgcc;
     getDriver().Diag(diag::err_drv_invalid_rtlib_name)
       << A->getAsString(Args);
   }
 
   return GetDefaultRuntimeLibType();
 }
 
+static bool ParseCXXStdlibType(const StringRef& Name,
+                               ToolChain::CXXStdlibType& Type) {
+  if (Name == "libc++")
+    Type = ToolChain::CST_Libcxx;
+  else if (Name == "libstdc++")
+    Type = ToolChain::CST_Libstdcxx;
+  else
+    return false;
+
+  return true;
+}
+
 ToolChain::CXXStdlibType ToolChain::GetCXXStdlibType(const ArgList &Args) const{
-  if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) {
-    StringRef Value = A->getValue();
-    if (Value == "libc++")
-      return ToolChain::CST_Libcxx;
-    if (Value == "libstdc++")
-      return ToolChain::CST_Libstdcxx;
+  ToolChain::CXXStdlibType Type;
+  bool HasValidType = false;
+
+  const Arg *A = Args.getLastArg(options::OPT_stdlib_EQ);
+  if (A) {
+    HasValidType = ParseCXXStdlibType(A->getValue(), Type);
+    if (!HasValidType)
       getDriver().Diag(diag::err_drv_invalid_stdlib_name)
         << A->getAsString(Args);
   }
 
-  return ToolChain::CST_Libstdcxx;
+  if (!HasValidType && !ParseCXXStdlibType(CLANG_DEFAULT_CXX_STDLIB, Type))
+    Type = GetDefaultCXXStdlibType();
+
+  return Type;
 }
 
 /// \brief Utility function to add a system include directory to CC1 arguments.
 /*static*/ void ToolChain::addSystemInclude(const ArgList &DriverArgs,
                                             ArgStringList &CC1Args,
                                             const Twine &Path) {
   CC1Args.push_back("-internal-isystem");
   CC1Args.push_back(DriverArgs.MakeArgString(Path));

lib/Driver/ToolChains.h

public:
   // most development is done against SDKs, so compiling for a different
   // architecture should not get any special treatment.
   bool isCrossCompiling() const override { return false; }
 
   llvm::opt::DerivedArgList *
   TranslateArgs(const llvm::opt::DerivedArgList &Args,
                 const char *BoundArch) const override;
 
+  CXXStdlibType GetDefaultCXXStdlibType() const override;
   ObjCRuntime getDefaultObjCRuntime(bool isNonFragile) const override;
   bool hasBlocksRuntime() const override;
 
   bool UseObjCMixedDispatch() const override {
     // This is only used with the non-fragile ABI and non-legacy dispatch.
 
     // Mixed dispatch is used everywhere except OS X before 10.6.
     return !(isTargetMacOS() && isMacosxVersionLT(10, 6));

 class LLVM_LIBRARY_VISIBILITY Bitrig : public Generic_ELF {
 public:
   Bitrig(const Driver &D, const llvm::Triple &Triple,
          const llvm::opt::ArgList &Args);
 
   bool IsMathErrnoDefault() const override { return false; }
   bool IsObjCNonFragileABIDefault() const override { return true; }
 
-  CXXStdlibType GetCXXStdlibType(const llvm::opt::ArgList &Args) const override;
+  CXXStdlibType GetDefaultCXXStdlibType() const override;
   void AddClangCXXStdlibIncludeArgs(
       const llvm::opt::ArgList &DriverArgs,
       llvm::opt::ArgStringList &CC1Args) const override;
   void AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args,
                            llvm::opt::ArgStringList &CmdArgs) const override;
   unsigned GetDefaultStackProtectorLevel(bool KernelOrKext) const override {
     return 1;
   }

lib/Driver/ToolChains.cpp

types::ID MachO::LookupTypeForExtension(const char *Ext) const {
   if (Ty == types::TY_PP_Asm)
     return types::TY_Asm;
 
   return Ty;
 }
 
 bool MachO::HasNativeLLVMSupport() const { return true; }
 
+ToolChain::CXXStdlibType Darwin::GetDefaultCXXStdlibType() const {
+  // Default to use libc++ on OS X 10.9+ and iOS 7+.
+  if ((isTargetMacOS() && !isMacosxVersionLT(10, 9)) ||
+       (isTargetIOSBased() && !isIPhoneOSVersionLT(7, 0)) ||
+       isTargetWatchOSBased())
+    return ToolChain::CST_Libcxx;
+
+  return ToolChain::CST_Libstdcxx;
+}
+
 /// Darwin provides an ARC runtime starting in MacOS X 10.7 and iOS 5.0.
 ObjCRuntime Darwin::getDefaultObjCRuntime(bool isNonFragile) const {
   if (isTargetWatchOSBased())
     return ObjCRuntime(ObjCRuntime::WatchOS, TargetVersion);
   if (isTargetIOSBased())
     return ObjCRuntime(ObjCRuntime::iOS, TargetVersion);
   if (isNonFragile)
     return ObjCRuntime(ObjCRuntime::MacOSX, TargetVersion);
void MachO::AddLinkRuntimeLibArgs(const ArgList &Args,
 
   AddLinkRuntimeLib(Args, CmdArgs, CompilerRT, false, true);
 }
 
 DerivedArgList *Darwin::TranslateArgs(const DerivedArgList &Args,
                                       const char *BoundArch) const {
   // First get the generic Apple args, before moving onto Darwin-specific ones.
   DerivedArgList *DAL = MachO::TranslateArgs(Args, BoundArch);
-  const OptTable &Opts = getDriver().getOpts();
 
   // If no architecture is bound, none of the translations here are relevant.
   if (!BoundArch)
     return DAL;
 
   // Add an explicit version min argument for the deployment target. We do this
   // after argument translation because -Xarch_ arguments may add a version min
   // argument.
for (ArgList::iterator it = DAL->begin(), ie = DAL->end(); it != ie; ) {
       assert(it != ie && "unexpected argument translation");
       A = *it;
       assert(A->getOption().getID() == options::OPT_static &&
              "missing expected -static argument");
       it = DAL->getArgs().erase(it);
     }
   }
 
-  // Default to use libc++ on OS X 10.9+ and iOS 7+.
-  if (((isTargetMacOS() && !isMacosxVersionLT(10, 9)) ||
-       (isTargetIOSBased() && !isIPhoneOSVersionLT(7, 0)) ||
-       isTargetWatchOSBased()) &&
-      !Args.getLastArg(options::OPT_stdlib_EQ))
-    DAL->AddJoinedArg(nullptr, Opts.getOption(options::OPT_stdlib_EQ),
-                      "libc++");
-
   // Validate the C++ standard library choice.
   CXXStdlibType Type = GetCXXStdlibType(*DAL);
   if (Type == ToolChain::CST_Libcxx) {
     // Check whether the target provides libc++.
     StringRef where;
 
     // Complain about targeting iOS < 5.0 in any way.
     if (isTargetIOSBased() && isIPhoneOSVersionLT(5, 0))

 }
 
 Tool *Bitrig::buildAssembler() const {
   return new tools::bitrig::Assembler(*this);
 }
 
 Tool *Bitrig::buildLinker() const { return new tools::bitrig::Linker(*this); }
 
-ToolChain::CXXStdlibType Bitrig::GetCXXStdlibType(const ArgList &Args) const {
-  if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) {
-    StringRef Value = A->getValue();
-    if (Value == "libstdc++")
-      return ToolChain::CST_Libstdcxx;
-    if (Value == "libc++")
-      return ToolChain::CST_Libcxx;
-
-    getDriver().Diag(diag::err_drv_invalid_stdlib_name) << A->getAsString(Args);
-  }
+ToolChain::CXXStdlibType Bitrig::GetDefaultCXXStdlibType() const {
   return ToolChain::CST_Libcxx;
 }
 
 void Bitrig::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
                                           ArgStringList &CC1Args) const {
   if (DriverArgs.hasArg(options::OPT_nostdlibinc) ||
       DriverArgs.hasArg(options::OPT_nostdincxx))
     return;

test/Driver/android-standalone.cpp

 // Test header and library paths when Clang is used with Android standalone
 // toolchain.
 //
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
-// RUN:     -target arm-linux-androideabi \
+// RUN:     -target arm-linux-androideabi -stdlib=libstdc++ \
 // RUN:     -B%S/Inputs/basic_android_tree \
 // RUN:     --sysroot=%S/Inputs/basic_android_tree/sysroot \
 // RUN:   | FileCheck  %s
 // CHECK: {{.*}}clang{{.*}}" "-cc1"
 // CHECK: "-internal-isystem" "{{.*}}/arm-linux-androideabi/include/c++/4.4.3"
 // CHECK: "-internal-isystem" "{{.*}}/arm-linux-androideabi/include/c++/4.4.3/arm-linux-androideabi"
 // CHECK: "-internal-externc-isystem" "{{.*}}/sysroot/include"
 // CHECK: "-internal-externc-isystem" "{{.*}}/sysroot/usr/include"
 // CHECK: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK: "-L{{.*}}/lib/gcc/arm-linux-androideabi/4.4.3"
 // CHECK: "-L{{.*}}/lib/gcc/arm-linux-androideabi/4.4.3/../../../../arm-linux-androideabi/lib"
 // CHECK: "-L{{.*}}/sysroot/usr/lib"
 //
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
-// RUN:     -target aarch64-linux-android \
+// RUN:     -target aarch64-linux-android -stdlib=libstdc++ \
 // RUN:     -B%S/Inputs/basic_android_tree \
 // RUN:     --sysroot=%S/Inputs/basic_android_tree/sysroot \
 // RUN:   | FileCheck --check-prefix=CHECK-AARCH64 %s
 // CHECK-AARCH64: {{.*}}clang{{.*}}" "-cc1"
 // CHECK-AARCH64: "-internal-isystem" "{{.*}}/aarch64-linux-android/include/c++/4.8"
 // CHECK-AARCH64: "-internal-isystem" "{{.*}}/aarch64-linux-android/include/c++/4.8/aarch64-linux-android"
 // CHECK-AARCH64: "-internal-externc-isystem" "{{.*}}/sysroot/include"
 // CHECK-AARCH64: "-internal-externc-isystem" "{{.*}}/sysroot/usr/include"
 // CHECK-AARCH64: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-AARCH64: "-L{{.*}}/lib/gcc/aarch64-linux-android/4.8"
 // CHECK-AARCH64: "-L{{.*}}/lib/gcc/aarch64-linux-android/4.8/../../../../aarch64-linux-android/lib"
 // CHECK-AARCH64: "-L{{.*}}/sysroot/usr/lib"
 //
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
-// RUN:     -target arm64-linux-android \
+// RUN:     -target arm64-linux-android -stdlib=libstdc++ \
 // RUN:     -B%S/Inputs/basic_android_tree \
 // RUN:     --sysroot=%S/Inputs/basic_android_tree/sysroot \
 // RUN:   | FileCheck --check-prefix=CHECK-ARM64 %s
 // CHECK-ARM64: {{.*}}clang{{.*}}" "-cc1"
 // CHECK-ARM64: "-internal-isystem" "{{.*}}/aarch64-linux-android/include/c++/4.8"
 // CHECK-ARM64: "-internal-isystem" "{{.*}}/aarch64-linux-android/include/c++/4.8/aarch64-linux-android"
 // CHECK-ARM64: "-internal-externc-isystem" "{{.*}}/sysroot/include"
 // CHECK-ARM64: "-internal-externc-isystem" "{{.*}}/sysroot/usr/include"
 // CHECK-ARM64: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-ARM64: "-L{{.*}}/lib/gcc/aarch64-linux-android/4.8"
 // CHECK-ARM64: "-L{{.*}}/lib/gcc/aarch64-linux-android/4.8/../../../../aarch64-linux-android/lib"
 // CHECK-ARM64: "-L{{.*}}/sysroot/usr/lib"
 //
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     -target mipsel-linux-android \
-// RUN:     -mips32 \
+// RUN:     -mips32 -stdlib=libstdc++ \
 // RUN:     -B%S/Inputs/basic_android_tree \
 // RUN:     --sysroot=%S/Inputs/basic_android_tree/sysroot \
 // RUN:   | FileCheck --check-prefix=CHECK-MIPS %s
 // CHECK-MIPS: {{.*}}clang{{.*}}" "-cc1"
 // CHECK-MIPS: "-internal-isystem" "{{.*}}/mipsel-linux-android/include/c++/4.4.3"
 // CHECK-MIPS: "-internal-isystem" "{{.*}}/mipsel-linux-android/include/c++/4.4.3/mipsel-linux-android"
 // CHECK-MIPS: "-internal-externc-isystem" "{{.*}}/sysroot/include"
 // CHECK-MIPS: "-internal-externc-isystem" "{{.*}}/sysroot/usr/include"
 // CHECK-MIPS: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-MIPS: "-L{{.*}}/lib/gcc/mipsel-linux-android/4.4.3"
 // CHECK-MIPS: "-L{{.*}}/lib/gcc/mipsel-linux-android/4.4.3/../../../../mipsel-linux-android/lib"
 // CHECK-MIPS: "-L{{.*}}/sysroot/usr/lib"
 //
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     -target mipsel-linux-android \
-// RUN:     -march=mips32 -mips32r2 \
+// RUN:     -march=mips32 -mips32r2 -stdlib=libstdc++ \
 // RUN:     -B%S/Inputs/basic_android_tree \
 // RUN:     --sysroot=%S/Inputs/basic_android_tree/sysroot \
 // RUN:   | FileCheck --check-prefix=CHECK-MIPSR2 %s
 // CHECK-MIPSR2: {{.*}}clang{{.*}}" "-cc1"
 // CHECK-MIPSR2: "-internal-isystem" "{{.*}}/mipsel-linux-android/include/c++/4.4.3"
 // CHECK-MIPSR2: "-internal-isystem" "{{.*}}/mipsel-linux-android/include/c++/4.4.3/mipsel-linux-android"
 // CHECK-MIPSR2: "-internal-externc-isystem" "{{.*}}/sysroot/include"
 // CHECK-MIPSR2: "-internal-externc-isystem" "{{.*}}/sysroot/usr/include"
 // CHECK-MIPSR2: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-MIPSR2: "-L{{.*}}/lib/gcc/mipsel-linux-android/4.4.3/mips-r2"
 // CHECK-MIPSR2: "-L{{.*}}/lib/gcc/mipsel-linux-android/4.4.3/../../../../mipsel-linux-android/lib"
 // CHECK-MIPSR2: "-L{{.*}}/sysroot/usr/lib"
 //
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     -target mipsel-linux-android \
-// RUN:     -mips32 -march=mips32r2 \
+// RUN:     -mips32 -march=mips32r2 -stdlib=libstdc++ \
 // RUN:     -B%S/Inputs/basic_android_tree \
 // RUN:     --sysroot=%S/Inputs/basic_android_tree/sysroot \
 // RUN:   | FileCheck --check-prefix=CHECK-MIPSR2-A %s
 // CHECK-MIPSR2-A: {{.*}}clang{{.*}}" "-cc1"
 // CHECK-MIPSR2-A: "-internal-isystem" "{{.*}}/mipsel-linux-android/include/c++/4.4.3"
 // CHECK-MIPSR2-A: "-internal-isystem" "{{.*}}/mipsel-linux-android/include/c++/4.4.3/mipsel-linux-android"
 // CHECK-MIPSR2-A: "-internal-externc-isystem" "{{.*}}/sysroot/include"
 // CHECK-MIPSR2-A: "-internal-externc-isystem" "{{.*}}/sysroot/usr/include"
 // CHECK-MIPSR2-A: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-MIPSR2-A: "-L{{.*}}/lib/gcc/mipsel-linux-android/4.4.3/mips-r2"
 // CHECK-MIPSR2-A: "-L{{.*}}/lib/gcc/mipsel-linux-android/4.4.3/../../../../mipsel-linux-android/lib"
 // CHECK-MIPSR2-A: "-L{{.*}}/sysroot/usr/lib"
 //
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     -target mipsel-linux-android \
-// RUN:     -mips32r6 \
+// RUN:     -mips32r6 -stdlib=libstdc++ \
 // RUN:     -B%S/Inputs/basic_android_tree \
 // RUN:     --sysroot=%S/Inputs/basic_android_tree/sysroot \
 // RUN:   | FileCheck --check-prefix=CHECK-MIPSR6 %s
 // CHECK-MIPSR6: {{.*}}clang{{.*}}" "-cc1"
 // CHECK-MIPSR6: "-internal-isystem" "{{.*}}/mipsel-linux-android/include/c++/4.4.3"
 // CHECK-MIPSR6: "-internal-isystem" "{{.*}}/mipsel-linux-android/include/c++/4.4.3/mipsel-linux-android"
 // CHECK-MIPSR6: "-internal-externc-isystem" "{{.*}}/sysroot/include"
 // CHECK-MIPSR6: "-internal-externc-isystem" "{{.*}}/sysroot/usr/include"
 // CHECK-MIPSR6: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
 // CHECK-MIPSR6: "-L{{.*}}/lib/gcc/mipsel-linux-android/4.4.3/mips-r6"
 // CHECK-MIPSR6: "-L{{.*}}/lib/gcc/mipsel-linux-android/4.4.3/../../../../mipsel-linux-android/lib"
 // CHECK-MIPSR6: "-L{{.*}}/sysroot/usr/lib"

test/Driver/darwin-iphone-defaults.m

-// RUN: %clang -target i386-apple-darwin9 -miphoneos-version-min=3.0 -arch armv7 -flto -S -o - %s | FileCheck %s
+// RUN: %clang -target i386-apple-darwin9 -miphoneos-version-min=3.0 -arch armv7 -stdlib=libstdc++ -flto -S -o - %s | FileCheck %s
 
 // CHECK: @f0() [[F0:#[0-9]+]]
 // CHECK: @__f0_block_invoke
 // CHECK: void @f1
 // CHECK-NOT: msgSend_fixup_alloc
 // CHECK: OBJC_SELECTOR_REFERENCES
 
 int f0() {

test/Driver/darwin-objc-gc.m

 // Check that we warn, but accept, -fobjc-gc for iPhone OS.
 
-// RUN: %clang -target i386-apple-darwin9 -miphoneos-version-min=3.0 -fobjc-gc -flto -S -o %t %s 2> %t.err
+// RUN: %clang -target i386-apple-darwin9 -miphoneos-version-min=3.0 -stdlib=libstdc++ -fobjc-gc -flto -S -o %t %s 2> %t.err
 // RUN: FileCheck --check-prefix=IPHONE_OBJC_GC_LL %s < %t 
 // RUN: FileCheck --check-prefix=IPHONE_OBJC_GC_STDERR %s < %t.err
 
 // IPHONE_OBJC_GC_LL: define void @f0
 // IPHONE_OBJC_GC_LL-NOT: objc_assign_ivar
 // IPHONE_OBJC_GC_LL: }
 
 // IPHONE_OBJC_GC_STDERR: warning: Objective-C garbage collection is not supported on this platform, ignoring '-fobjc-gc'
 
 @interface A {
 @public
  id x;
 }
 @end
 
 void f0(A *a, id x) { a->x = x; }

test/Driver/darwin-sanitizer-ld.c

 // Test sanitizer link flags on Darwin.
 
 // RUN: %clang -no-canonical-prefixes -### -target x86_64-darwin \
-// RUN:   -fsanitize=address %s -o %t.o 2>&1 \
+// RUN:   -stdlib=libstdc++ -fsanitize=address %s -o %t.o 2>&1 \
 // RUN:   | FileCheck --check-prefix=CHECK-ASAN %s
 
 // CHECK-ASAN: "{{.*}}ld{{(.exe)?}}"
 // CHECK-ASAN: stdc++
 // CHECK-ASAN: libclang_rt.asan_osx_dynamic.dylib"
 // CHECK-ASAN: "-rpath" "@executable_path"
 // CHECK-ASAN: "-rpath" "{{.*}}lib{{.*}}darwin"
 
 // RUN: %clang -no-canonical-prefixes -### -target x86_64-darwin \
 // RUN:   -fPIC -shared -fsanitize=address %s -o %t.so 2>&1 \
 // RUN:   | FileCheck --check-prefix=CHECK-DYN-ASAN %s
 
 // CHECK-DYN-ASAN: "{{.*}}ld{{(.exe)?}}"
 // CHECK-DYN-ASAN: "-dylib"
 // CHECK-DYN-ASAN: libclang_rt.asan_osx_dynamic.dylib"
 // CHECK-DYN-ASAN: "-rpath" "@executable_path"
 // CHECK-DYN-ASAN: "-rpath" "{{.*}}lib{{.*}}darwin"
 
 // RUN: %clang -no-canonical-prefixes -### -target x86_64-darwin \
-// RUN:   -fsanitize=undefined %s -o %t.o 2>&1 \
+// RUN:   -stdlib=libstdc++ -fsanitize=undefined %s -o %t.o 2>&1 \
 // RUN:   | FileCheck --check-prefix=CHECK-UBSAN %s
 
 // CHECK-UBSAN: "{{.*}}ld{{(.exe)?}}"
 // CHECK-UBSAN: stdc++
 // CHECK-UBSAN: libclang_rt.ubsan_osx_dynamic.dylib"
 // CHECK-UBSAN: "-rpath" "@executable_path"
 // CHECK-UBSAN: "-rpath" "{{.*}}lib{{.*}}darwin"
 

test/Driver/gcc-toolchain.cpp

 // Test that gcc-toolchain option is working correctly
 //
 // RUN: %clangxx -no-canonical-prefixes %s -### -o %t 2>&1 \
-// RUN:     --target=i386-unknown-linux \
+// RUN:     --target=i386-unknown-linux -stdlib=libstdc++ \
 // RUN:     --gcc-toolchain=%S/Inputs/ubuntu_11.04_multiarch_tree/usr \
 // RUN:   | FileCheck %s
 //
 // Additionally check that the legacy spelling of the flag works.
 // RUN: %clangxx -no-canonical-prefixes %s -### -o %t 2>&1 \
-// RUN:     --target=i386-unknown-linux \
+// RUN:     --target=i386-unknown-linux -stdlib=libstdc++ \
 // RUN:     -gcc-toolchain %S/Inputs/ubuntu_11.04_multiarch_tree/usr \
 // RUN:   | FileCheck %s
 //
 // Test for header search toolchain detection.
 // CHECK: "-internal-isystem"
 // CHECK: "[[TOOLCHAIN:[^"]+]]/usr/lib/i386-linux-gnu/gcc/i686-linux-gnu/4.5/../../../../../include/c++/4.5"
 // CHECK: "-internal-isystem"
 // CHECK: "[[TOOLCHAIN]]/usr/lib/i386-linux-gnu/gcc/i686-linux-gnu/4.5/../../../../../include/c++/4.5/i686-linux-gnu"

test/Driver/linux-header-search.cpp

 // RUN:   | FileCheck --check-prefix=CHECK-BASIC-LIBSTDCXX-LIBCXXV2-SYSROOT %s
 // CHECK-BASIC-LIBSTDCXX-LIBCXXV2-SYSROOT: "{{[^"]*}}clang{{[^"]*}}" "-cc1"
 // CHECK-BASIC-LIBSTDCXX-LIBCXXV2-SYSROOT: "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-BASIC-LIBSTDCXX-LIBCXXV2-SYSROOT: "-internal-isystem" "[[SYSROOT]]/usr/include/c++/v2"
 // CHECK-BASIC-LIBSTDCXX-LIBCXXV2-SYSROOT: "-internal-isystem" "[[SYSROOT]]/usr/local/include"
 //
 // Test a very broken version of multiarch that shipped in Ubuntu 11.04.
 // RUN: %clang -no-canonical-prefixes %s -### -fsyntax-only 2>&1 \
-// RUN:     -target i386-unknown-linux \
+// RUN:     -target i386-unknown-linux -stdlib=libstdc++ \
 // RUN:     --sysroot=%S/Inputs/ubuntu_11.04_multiarch_tree \
 // RUN:     --gcc-toolchain="" \
 // RUN:   | FileCheck --check-prefix=CHECK-UBUNTU-11-04 %s
 // CHECK-UBUNTU-11-04: "{{.*}}clang{{.*}}" "-cc1"
 // CHECK-UBUNTU-11-04: "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
 // CHECK-UBUNTU-11-04: "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-UBUNTU-11-04: "-internal-isystem" "[[SYSROOT]]/usr/lib/i386-linux-gnu/gcc/i686-linux-gnu/4.5/../../../../../include/c++/4.5"
 // CHECK-UBUNTU-11-04: "-internal-isystem" "[[SYSROOT]]/usr/lib/i386-linux-gnu/gcc/i686-linux-gnu/4.5/../../../../../include/c++/4.5/i686-linux-gnu"
 // CHECK-UBUNTU-11-04: "-internal-isystem" "[[SYSROOT]]/usr/lib/i386-linux-gnu/gcc/i686-linux-gnu/4.5/../../../../../include/c++/4.5/backward"
 // CHECK-UBUNTU-11-04: "-internal-isystem" "[[SYSROOT]]/usr/local/include"
 // CHECK-UBUNTU-11-04: "-internal-isystem" "[[RESOURCE_DIR]]{{/|\\\\}}include"
 // CHECK-UBUNTU-11-04: "-internal-externc-isystem" "[[SYSROOT]]/include"
 // CHECK-UBUNTU-11-04: "-internal-externc-isystem" "[[SYSROOT]]/usr/include"
 //
 // RUN: %clang -no-canonical-prefixes %s -### -fsyntax-only 2>&1 \
-// RUN:     -target x86_64-unknown-linux-gnu \
+// RUN:     -target x86_64-unknown-linux-gnu -stdlib=libstdc++ \
 // RUN:     --sysroot=%S/Inputs/ubuntu_13.04_multiarch_tree \
 // RUN:     --gcc-toolchain="" \
 // RUN:   | FileCheck --check-prefix=CHECK-UBUNTU-13-04 %s
 // CHECK-UBUNTU-13-04: "{{[^"]*}}clang{{[^"]*}}" "-cc1"
 // CHECK-UBUNTU-13-04: "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
 // CHECK-UBUNTU-13-04: "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-UBUNTU-13-04: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../include/c++/4.7"
 // CHECK-UBUNTU-13-04: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../include/x86_64-linux-gnu/c++/4.7"
 // CHECK-UBUNTU-13-04: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../include/c++/4.7/backward"
 // CHECK-UBUNTU-13-04: "-internal-isystem" "[[SYSROOT]]/usr/local/include"
 // CHECK-UBUNTU-13-04: "-internal-isystem" "[[RESOURCE_DIR]]{{/|\\\\}}include"
 // CHECK-UBUNTU-13-04: "-internal-externc-isystem" "[[SYSROOT]]/usr/include/x86_64-linux-gnu"
 // CHECK-UBUNTU-13-04: "-internal-externc-isystem" "[[SYSROOT]]/include"
 // CHECK-UBUNTU-13-04: "-internal-externc-isystem" "[[SYSROOT]]/usr/include"
 //
 // RUN: %clang -no-canonical-prefixes %s -### -fsyntax-only 2>&1 \
-// RUN:     -target x86_64-unknown-linux-gnux32 \
+// RUN:     -target x86_64-unknown-linux-gnux32 -stdlib=libstdc++ \
 // RUN:     --sysroot=%S/Inputs/ubuntu_14.04_multiarch_tree \
 // RUN:     --gcc-toolchain="" \
 // RUN:   | FileCheck --check-prefix=CHECK-UBUNTU-14-04 %s
 // CHECK-UBUNTU-14-04: "{{[^"]*}}clang{{[^"]*}}" "-cc1"
 // CHECK-UBUNTU-14-04: "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
 // CHECK-UBUNTU-14-04: "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-UBUNTU-14-04: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8"
 // CHECK-UBUNTU-14-04: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/x86_64-linux-gnu/c++/4.8/x32"
 // CHECK-UBUNTU-14-04: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/backward"
 // CHECK-UBUNTU-14-04: "-internal-isystem" "[[SYSROOT]]/usr/local/include"
 // CHECK-UBUNTU-14-04: "-internal-isystem" "[[RESOURCE_DIR]]{{/|\\\\}}include"
 // CHECK-UBUNTU-14-04: "-internal-externc-isystem" "[[SYSROOT]]/usr/include/x86_64-linux-gnu"
 // CHECK-UBUNTU-14-04: "-internal-externc-isystem" "[[SYSROOT]]/include"
 // CHECK-UBUNTU-14-04: "-internal-externc-isystem" "[[SYSROOT]]/usr/include"
 ///
 // RUN: %clang -no-canonical-prefixes %s -### -fsyntax-only 2>&1 \
-// RUN:     -target arm-linux-gnueabihf \
+// RUN:     -target arm-linux-gnueabihf -stdlib=libstdc++ \
 // RUN:     --sysroot=%S/Inputs/ubuntu_13.04_multiarch_tree \
 // RUN:     --gcc-toolchain="" \
 // RUN:   | FileCheck --check-prefix=CHECK-UBUNTU-13-04-CROSS %s
 // CHECK-UBUNTU-13-04-CROSS: "{{[^"]*}}clang{{[^"]*}}" "-cc1"
 // CHECK-UBUNTU-13-04-CROSS: "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
 // CHECK-UBUNTU-13-04-CROSS: "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-UBUNTU-13-04-CROSS: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc-cross/arm-linux-gnueabihf/4.7/../../../../include/c++/4.7"
 // CHECK-UBUNTU-13-04-CROSS: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc-cross/arm-linux-gnueabihf/4.7/../../../../include/arm-linux-gnueabihf/c++/4.7"
 // CHECK-UBUNTU-13-04-CROSS: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc-cross/arm-linux-gnueabihf/4.7/../../../../include/c++/4.7/backward"
 // CHECK-UBUNTU-13-04-CROSS: "-internal-isystem" "[[SYSROOT]]/usr/local/include"
 // CHECK-UBUNTU-13-04-CROSS: "-internal-isystem" "[[RESOURCE_DIR]]{{/|\\\\}}include"
 // CHECK-UBUNTU-13-04-CROSS: "-internal-externc-isystem" "[[SYSROOT]]/include"
 // CHECK-UBUNTU-13-04-CROSS: "-internal-externc-isystem" "[[SYSROOT]]/usr/include"
 //
 // Test Ubuntu/Debian's new version of multiarch, with -m32.
 // RUN: %clang -no-canonical-prefixes %s -### -fsyntax-only 2>&1 \
-// RUN:     -target x86_64-unknown-linux-gnu -m32 \
+// RUN:     -target x86_64-unknown-linux-gnu -m32 -stdlib=libstdc++ \
 // RUN:     --sysroot=%S/Inputs/ubuntu_13.04_multiarch_tree \
 // RUN:     --gcc-toolchain="" \
 // RUN:   | FileCheck --check-prefix=CHECK-UBUNTU-13-04-M32 %s
 // CHECK-UBUNTU-13-04-M32: "{{[^"]*}}clang{{[^"]*}}" "-cc1"
 // CHECK-UBUNTU-13-04-M32: "-triple" "i386-unknown-linux-gnu"
 // CHECK-UBUNTU-13-04-M32: "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-UBUNTU-13-04-M32: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../include/c++/4.7"
 // CHECK-UBUNTU-13-04-M32: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../include/x86_64-linux-gnu/c++/4.7/32"
 // CHECK-UBUNTU-13-04-M32: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../include/c++/4.7/backward"
 //
 // Test Ubuntu/Debian's Ubuntu 14.04 config variant, with -m32
 // and an empty 4.9 directory.
 // RUN: %clang -no-canonical-prefixes %s -### -fsyntax-only 2>&1 \
-// RUN:     -target x86_64-unknown-linux-gnu -m32 \
+// RUN:     -target x86_64-unknown-linux-gnu -m32 -stdlib=libstdc++ \
 // RUN:     --sysroot=%S/Inputs/ubuntu_14.04_multiarch_tree \
 // RUN:     --gcc-toolchain="" \
 // RUN:   | FileCheck --check-prefix=CHECK-UBUNTU-14-04-M32 %s
 // CHECK-UBUNTU-14-04-M32: "{{[^"]*}}clang{{[^"]*}}" "-cc1"
 // CHECK-UBUNTU-14-04-M32: "-triple" "i386-unknown-linux-gnu"
 // CHECK-UBUNTU-14-04-M32: "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-UBUNTU-14-04-M32: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8"
 // CHECK-UBUNTU-14-04-M32: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/x86_64-linux-gnu/c++/4.8/32"
 // CHECK-UBUNTU-14-04-M32: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/backward"
 //
 // Test Ubuntu/Debian's Ubuntu 14.04 with -m32 and an i686 cross compiler
 // installed rather than relying on multilib. Also happens to look like an
 // actual i686 Ubuntu system.
 // RUN: %clang -no-canonical-prefixes %s -### -fsyntax-only 2>&1 \
-// RUN:     -target x86_64-unknown-linux-gnu -m32 \
+// RUN:     -target x86_64-unknown-linux-gnu -m32 -stdlib=libstdc++ \
 // RUN:     --sysroot=%S/Inputs/ubuntu_14.04_multiarch_tree2 \
 // RUN:     --gcc-toolchain="" \
 // RUN:   | FileCheck --check-prefix=CHECK-UBUNTU-14-04-I686 %s
 // CHECK-UBUNTU-14-04-I686: "{{[^"]*}}clang{{[^"]*}}" "-cc1"
 // CHECK-UBUNTU-14-04-I686: "-triple" "i386-unknown-linux-gnu"
 // CHECK-UBUNTU-14-04-I686: "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-UBUNTU-14-04-I686: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/i686-linux-gnu/4.8/../../../../include/c++/4.8"
 // CHECK-UBUNTU-14-04-I686: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/i686-linux-gnu/4.8/../../../../include/i386-linux-gnu/c++/4.8"
 // CHECK-UBUNTU-14-04-I686: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/i686-linux-gnu/4.8/../../../../include/c++/4.8/backward"
 //
 // Test Ubuntu/Debian's Ubuntu 14.04 for powerpc64le
 // RUN: %clang -no-canonical-prefixes %s -### -fsyntax-only 2>&1 \
-// RUN:     -target powerpc64le-unknown-linux-gnu -m32 \
+// RUN:     -target powerpc64le-unknown-linux-gnu -m32 -stdlib=libstdc++ \
 // RUN:     --sysroot=%S/Inputs/ubuntu_14.04_multiarch_tree \
 // RUN:     --gcc-toolchain="" \
 // RUN:   | FileCheck --check-prefix=CHECK-UBUNTU-14-04-PPC64LE %s
 // CHECK-UBUNTU-14-04-PPC64LE: "{{[^"]*}}clang{{[^"]*}}" "-cc1"
 // CHECK-UBUNTU-14-04-PPC64LE: "-triple" "powerpc64le-unknown-linux-gnu"
 // CHECK-UBUNTU-14-04-PPC64LE: "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-UBUNTU-14-04-PPC64LE: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/powerpc64le-linux-gnu/4.8/../../../../include/c++/4.8"
 // CHECK-UBUNTU-14-04-PPC64LE: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/powerpc64le-linux-gnu/4.8/../../../../include/powerpc64le-linux-gnu/c++/4.8"
 // CHECK-UBUNTU-14-04-PPC64LE: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/powerpc64le-linux-gnu/4.8/../../../../include/c++/4.8/backward"
 // CHECK-UBUNTU-14-04-PPC64LE: "-internal-externc-isystem" "[[SYSROOT]]/usr/include/powerpc64le-linux-gnu"
 // CHECK-UBUNTU-14-04-PPC64LE: "-internal-externc-isystem" "[[SYSROOT]]/include"
 // CHECK-UBUNTU-14-04-PPC64LE: "-internal-externc-isystem" "[[SYSROOT]]/usr/include"
 //
 // Thoroughly exercise the Debian multiarch environment.
 // RUN: %clang -no-canonical-prefixes %s -### -fsyntax-only 2>&1 \
-// RUN:     -target i686-linux-gnu \
+// RUN:     -target i686-linux-gnu -stdlib=libstdc++ \
 // RUN:     --sysroot=%S/Inputs/debian_multiarch_tree \
 // RUN:     --gcc-toolchain="" \
 // RUN:   | FileCheck --check-prefix=CHECK-DEBIAN-X86 %s
 // CHECK-DEBIAN-X86: "{{[^"]*}}clang{{[^"]*}}" "-cc1"
 // CHECK-DEBIAN-X86: "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
 // CHECK-DEBIAN-X86: "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-DEBIAN-X86: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/i686-linux-gnu/4.5/../../../../include/c++/4.5"
 // CHECK-DEBIAN-X86: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/i686-linux-gnu/4.5/../../../../include/c++/4.5/i686-linux-gnu"
 // CHECK-DEBIAN-X86: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/i686-linux-gnu/4.5/../../../../include/c++/4.5/backward"
 // CHECK-DEBIAN-X86: "-internal-isystem" "[[SYSROOT]]/usr/local/include"
 // CHECK-DEBIAN-X86: "-internal-isystem" "[[RESOURCE_DIR]]{{/|\\\\}}include"
 // CHECK-DEBIAN-X86: "-internal-externc-isystem" "[[SYSROOT]]/usr/include/i386-linux-gnu"
 // CHECK-DEBIAN-X86: "-internal-externc-isystem" "[[SYSROOT]]/include"
 // CHECK-DEBIAN-X86: "-internal-externc-isystem" "[[SYSROOT]]/usr/include"
 // RUN: %clang -no-canonical-prefixes %s -### -fsyntax-only 2>&1 \
-// RUN:     -target x86_64-linux-gnu \
+// RUN:     -target x86_64-linux-gnu -stdlib=libstdc++ \
 // RUN:     --sysroot=%S/Inputs/debian_multiarch_tree \
 // RUN:     --gcc-toolchain="" \
 // RUN:   | FileCheck --check-prefix=CHECK-DEBIAN-X86-64 %s
 // CHECK-DEBIAN-X86-64: "{{[^"]*}}clang{{[^"]*}}" "-cc1"
 // CHECK-DEBIAN-X86-64: "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
 // CHECK-DEBIAN-X86-64: "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-DEBIAN-X86-64: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/x86_64-linux-gnu/4.5/../../../../include/c++/4.5"
 // CHECK-DEBIAN-X86-64: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/x86_64-linux-gnu/4.5/../../../../include/c++/4.5/x86_64-linux-gnu"
 // CHECK-DEBIAN-X86-64: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/x86_64-linux-gnu/4.5/../../../../include/c++/4.5/backward"
 // CHECK-DEBIAN-X86-64: "-internal-isystem" "[[SYSROOT]]/usr/local/include"
 // CHECK-DEBIAN-X86-64: "-internal-isystem" "[[RESOURCE_DIR]]{{/|\\\\}}include"
 // CHECK-DEBIAN-X86-64: "-internal-externc-isystem" "[[SYSROOT]]/usr/include/x86_64-linux-gnu"
 // CHECK-DEBIAN-X86-64: "-internal-externc-isystem" "[[SYSROOT]]/include"
 // CHECK-DEBIAN-X86-64: "-internal-externc-isystem" "[[SYSROOT]]/usr/include"
 // RUN: %clang -no-canonical-prefixes %s -### -fsyntax-only 2>&1 \
-// RUN:     -target powerpc-linux-gnu \
+// RUN:     -target powerpc-linux-gnu -stdlib=libstdc++ \
 // RUN:     --sysroot=%S/Inputs/debian_multiarch_tree \
 // RUN:     --gcc-toolchain="" \
 // RUN:   | FileCheck --check-prefix=CHECK-DEBIAN-PPC %s
 // CHECK-DEBIAN-PPC: "{{[^"]*}}clang{{[^"]*}}" "-cc1"
 // CHECK-DEBIAN-PPC: "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
 // CHECK-DEBIAN-PPC: "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-DEBIAN-PPC: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/powerpc-linux-gnu/4.5/../../../../include/c++/4.5"
 // CHECK-DEBIAN-PPC: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/powerpc-linux-gnu/4.5/../../../../include/c++/4.5/powerpc-linux-gnu"
 // CHECK-DEBIAN-PPC: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/powerpc-linux-gnu/4.5/../../../../include/c++/4.5/backward"
 // CHECK-DEBIAN-PPC: "-internal-isystem" "[[SYSROOT]]/usr/local/include"
 // CHECK-DEBIAN-PPC: "-internal-isystem" "[[RESOURCE_DIR]]{{/|\\\\}}include"
 // CHECK-DEBIAN-PPC: "-internal-externc-isystem" "[[SYSROOT]]/usr/include/powerpc-linux-gnu"
 // CHECK-DEBIAN-PPC: "-internal-externc-isystem" "[[SYSROOT]]/include"
 // CHECK-DEBIAN-PPC: "-internal-externc-isystem" "[[SYSROOT]]/usr/include"
 // RUN: %clang -no-canonical-prefixes %s -### -fsyntax-only 2>&1 \
-// RUN:     -target powerpc64-linux-gnu \
+// RUN:     -target powerpc64-linux-gnu -stdlib=libstdc++ \
 // RUN:     --sysroot=%S/Inputs/debian_multiarch_tree \
 // RUN:     --gcc-toolchain="" \
 // RUN:   | FileCheck --check-prefix=CHECK-DEBIAN-PPC64 %s
 // CHECK-DEBIAN-PPC64: "{{[^"]*}}clang{{[^"]*}}" "-cc1"
 // CHECK-DEBIAN-PPC64: "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
 // CHECK-DEBIAN-PPC64: "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-DEBIAN-PPC64: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/powerpc64-linux-gnu/4.5/../../../../include/c++/4.5"
 // CHECK-DEBIAN-PPC64: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/powerpc64-linux-gnu/4.5/../../../../include/c++/4.5/powerpc64-linux-gnu"
 // CHECK-DEBIAN-PPC64: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/powerpc64-linux-gnu/4.5/../../../../include/c++/4.5/backward"
 // CHECK-DEBIAN-PPC64: "-internal-isystem" "[[SYSROOT]]/usr/local/include"
 // CHECK-DEBIAN-PPC64: "-internal-isystem" "[[RESOURCE_DIR]]{{/|\\\\}}include"
 // CHECK-DEBIAN-PPC64: "-internal-externc-isystem" "[[SYSROOT]]/usr/include/powerpc64-linux-gnu"
 // CHECK-DEBIAN-PPC64: "-internal-externc-isystem" "[[SYSROOT]]/include"
 // CHECK-DEBIAN-PPC64: "-internal-externc-isystem" "[[SYSROOT]]/usr/include"
 //
 // Test Gentoo's weirdness both before and after they changed it in their GCC
 // 4.6.4 release.
 // RUN: %clang -no-canonical-prefixes %s -### -fsyntax-only 2>&1 \
-// RUN:     -target x86_64-unknown-linux-gnu \
+// RUN:     -target x86_64-unknown-linux-gnu -stdlib=libstdc++ \
 // RUN:     --sysroot=%S/Inputs/gentoo_linux_gcc_4.6.2_tree \
 // RUN:     --gcc-toolchain="" \
 // RUN:   | FileCheck --check-prefix=CHECK-GENTOO-4-6-2 %s
 // CHECK-GENTOO-4-6-2: "{{.*}}clang{{.*}}" "-cc1"
 // CHECK-GENTOO-4-6-2: "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
 // CHECK-GENTOO-4-6-2: "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-GENTOO-4-6-2: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/x86_64-pc-linux-gnu/4.6.2/include/g++-v4"
 // CHECK-GENTOO-4-6-2: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/x86_64-pc-linux-gnu/4.6.2/include/g++-v4/x86_64-pc-linux-gnu"
 // CHECK-GENTOO-4-6-2: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/x86_64-pc-linux-gnu/4.6.2/include/g++-v4/backward"
 // CHECK-GENTOO-4-6-2: "-internal-isystem" "[[SYSROOT]]/usr/local/include"
 // CHECK-GENTOO-4-6-2: "-internal-isystem" "[[RESOURCE_DIR]]{{/|\\\\}}include"
 // CHECK-GENTOO-4-6-2: "-internal-externc-isystem" "[[SYSROOT]]/include"
 // CHECK-GENTOO-4-6-2: "-internal-externc-isystem" "[[SYSROOT]]/usr/include"
 // RUN: %clang -no-canonical-prefixes %s -### -fsyntax-only 2>&1 \
-// RUN:     -target x86_64-unknown-linux-gnu \
+// RUN:     -target x86_64-unknown-linux-gnu -stdlib=libstdc++ \
 // RUN:     --sysroot=%S/Inputs/gentoo_linux_gcc_4.6.4_tree \
 // RUN:     --gcc-toolchain="" \
 // RUN:   | FileCheck --check-prefix=CHECK-GENTOO-4-6-4 %s
 // CHECK-GENTOO-4-6-4: "{{.*}}clang{{.*}}" "-cc1"
 // CHECK-GENTOO-4-6-4: "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
 // CHECK-GENTOO-4-6-4: "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-GENTOO-4-6-4: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/x86_64-pc-linux-gnu/4.6.4/include/g++-v4.6"
 // CHECK-GENTOO-4-6-4: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/x86_64-pc-linux-gnu/4.6.4/include/g++-v4.6/x86_64-pc-linux-gnu"
 // CHECK-GENTOO-4-6-4: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/x86_64-pc-linux-gnu/4.6.4/include/g++-v4.6/backward"
 // CHECK-GENTOO-4-6-4: "-internal-isystem" "[[SYSROOT]]/usr/local/include"
 // CHECK-GENTOO-4-6-4: "-internal-isystem" "[[RESOURCE_DIR]]{{/|\\\\}}include"
 // CHECK-GENTOO-4-6-4: "-internal-externc-isystem" "[[SYSROOT]]/include"
 // CHECK-GENTOO-4-6-4: "-internal-externc-isystem" "[[SYSROOT]]/usr/include"
 //
 // Check header search on Debian 6 / MIPS64
 // RUN: %clang -no-canonical-prefixes %s -### -fsyntax-only 2>&1 \
-// RUN:     -target mips64-unknown-linux-gnuabi64 \
+// RUN:     -target mips64-unknown-linux-gnuabi64 -stdlib=libstdc++ \
 // RUN:     --sysroot=%S/Inputs/debian_6_mips64_tree \
 // RUN:     --gcc-toolchain="" \
 // RUN:   | FileCheck --check-prefix=CHECK-MIPS64-GNUABI %s
 // CHECK-MIPS64-GNUABI: "{{[^"]*}}clang{{[^"]*}}" "-cc1"
 // CHECK-MIPS64-GNUABI: "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
 // CHECK-MIPS64-GNUABI: "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-MIPS64-GNUABI: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/mips64-linux-gnuabi64/4.9/../../../../include/c++/4.9"
 // CHECK-MIPS64-GNUABI: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/mips64-linux-gnuabi64/4.9/../../../../include/c++/4.9/mips64-linux-gnuabi64"
 // CHECK-MIPS64-GNUABI: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/mips64-linux-gnuabi64/4.9/../../../../include/c++/4.9/backward"
 // CHECK-MIPS64-GNUABI: "-internal-isystem" "[[SYSROOT]]/usr/local/include"
 // CHECK-MIPS64-GNUABI: "-internal-isystem" "[[RESOURCE_DIR]]{{/|\\\\}}include"
 // CHECK-MIPS64-GNUABI: "-internal-externc-isystem" "[[SYSROOT]]/usr/include/mips64-linux-gnuabi64"
 // CHECK-MIPS64-GNUABI: "-internal-externc-isystem" "[[SYSROOT]]/include"
 // CHECK-MIPS64-GNUABI: "-internal-externc-isystem" "[[SYSROOT]]/usr/include"
 //
 // Check header search on Debian 6 / MIPS64
 // RUN: %clang -no-canonical-prefixes %s -### -fsyntax-only 2>&1 \
-// RUN:     -target mips64el-unknown-linux-gnuabi64 \
+// RUN:     -target mips64el-unknown-linux-gnuabi64 -stdlib=libstdc++ \
 // RUN:     --sysroot=%S/Inputs/debian_6_mips64_tree \
 // RUN:     --gcc-toolchain="" \
 // RUN:   | FileCheck --check-prefix=CHECK-MIPS64EL-GNUABI %s
 // CHECK-MIPS64EL-GNUABI: "{{[^"]*}}clang{{[^"]*}}" "-cc1"
 // CHECK-MIPS64EL-GNUABI: "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
 // CHECK-MIPS64EL-GNUABI: "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-MIPS64EL-GNUABI: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/mips64el-linux-gnuabi64/4.9/../../../../include/c++/4.9"
 // CHECK-MIPS64EL-GNUABI: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/mips64el-linux-gnuabi64/4.9/../../../../include/c++/4.9/mips64el-linux-gnuabi64"
 // CHECK-MIPS64EL-GNUABI: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/mips64el-linux-gnuabi64/4.9/../../../../include/c++/4.9/backward"
 // CHECK-MIPS64EL-GNUABI: "-internal-isystem" "[[SYSROOT]]/usr/local/include"
 // CHECK-MIPS64EL-GNUABI: "-internal-isystem" "[[RESOURCE_DIR]]{{/|\\\\}}include"
 // CHECK-MIPS64EL-GNUABI: "-internal-externc-isystem" "[[SYSROOT]]/usr/include/mips64el-linux-gnuabi64"
 // CHECK-MIPS64EL-GNUABI: "-internal-externc-isystem" "[[SYSROOT]]/include"
 // CHECK-MIPS64EL-GNUABI: "-internal-externc-isystem" "[[SYSROOT]]/usr/include"
 
 // Check header search on Debian 8 / Sparc
 // RUN: %clang -no-canonical-prefixes %s -### -fsyntax-only 2>&1 \
-// RUN:     -target sparc-unknown-linux-gnu \
+// RUN:     -target sparc-unknown-linux-gnu -stdlib=libstdc++ \
 // RUN:     --sysroot=%S/Inputs/debian_8_sparc_multilib_tree \
 // RUN:     --gcc-toolchain="" \
 // RUN:   | FileCheck --check-prefix=CHECK-DEBIAN-SPARC32 %s
 // CHECK-DEBIAN-SPARC32: "{{[^"]*}}clang{{[^"]*}}" "-cc1"
 // CHECK-DEBIAN-SPARC32: "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
 // CHECK-DEBIAN-SPARC32: "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-DEBIAN-SPARC32: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/sparc-linux-gnu/4.9/../../../../include/c++/4.9"
 // CHECK-DEBIAN-SPARC32: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/sparc-linux-gnu/4.9/../../../../include/sparc-linux-gnu/c++/4.9"
 // CHECK-DEBIAN-SPARC32: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/sparc-linux-gnu/4.9/../../../../include/c++/4.9/backward"
 // CHECK-DEBIAN-SPARC32: "-internal-isystem" "[[SYSROOT]]/usr/local/include"
 // CHECK-DEBIAN-SPARC32: "-internal-isystem" "[[RESOURCE_DIR]]{{/|\\\\}}include"
 // CHECK-DEBIAN-SPARC32: "-internal-externc-isystem" "[[SYSROOT]]/usr/include/sparc-linux-gnu"
 // CHECK-DEBIAN-SPARC32: "-internal-externc-isystem" "[[SYSROOT]]/include"
 // CHECK-DEBIAN-SPARC32: "-internal-externc-isystem" "[[SYSROOT]]/usr/include"
 
 // Check header search on Debian 8 / Sparc, with the oldstyle multilib packages
 // RUN: %clang -no-canonical-prefixes -m64 %s -### -fsyntax-only 2>&1 \
-// RUN:     -target sparc-unknown-linux-gnu \
+// RUN:     -target sparc-unknown-linux-gnu -stdlib=libstdc++ \
 // RUN:     --sysroot=%S/Inputs/debian_8_sparc_multilib_tree \
 // RUN:     --gcc-toolchain="" \
 // RUN:   | FileCheck --check-prefix=CHECK-DEBIAN-SPARC32-LIB64 %s
 // CHECK-DEBIAN-SPARC32-LIB64: "{{[^"]*}}clang{{[^"]*}}" "-cc1"
 // CHECK-DEBIAN-SPARC32-LIB64: "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
 // CHECK-DEBIAN-SPARC32-LIB64: "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-DEBIAN-SPARC32-LIB64: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/sparc-linux-gnu/4.9/../../../../include/c++/4.9"
 // CHECK-DEBIAN-SPARC32-LIB64: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/sparc-linux-gnu/4.9/../../../../include/sparc-linux-gnu/c++/4.9/64"
 // CHECK-DEBIAN-SPARC32-LIB64: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/sparc-linux-gnu/4.9/../../../../include/c++/4.9/backward"
 // CHECK-DEBIAN-SPARC32-LIB64: "-internal-isystem" "[[SYSROOT]]/usr/local/include"
 // CHECK-DEBIAN-SPARC32-LIB64: "-internal-isystem" "[[RESOURCE_DIR]]{{/|\\\\}}include"
 /* TODO: GCC 4.9 includes the following dir in its search path, which
    seems questionable. Clang doesn't. Not sure if clang should be
    doing that too. */
 // CHECK-DEBIAN-SPARC32-LIB64-todo: "-internal-externc-isystem" "[[SYSROOT]]/usr/include/sparc-linux-gnu"
 // CHECK-DEBIAN-SPARC32-LIB64: "-internal-externc-isystem" "[[SYSROOT]]/include"
 // CHECK-DEBIAN-SPARC32-LIB64: "-internal-externc-isystem" "[[SYSROOT]]/usr/include"
 
 // Check header search on Debian 8 / Sparc64
 // RUN: %clang -no-canonical-prefixes %s -### -fsyntax-only 2>&1 \
-// RUN:     -target sparc64-unknown-linux-gnu \
+// RUN:     -target sparc64-unknown-linux-gnu -stdlib=libstdc++ \
 // RUN:     --sysroot=%S/Inputs/debian_8_sparc64_tree \
 // RUN:     --gcc-toolchain="" \
 // RUN:   | FileCheck --check-prefix=CHECK-DEBIAN-SPARC64 %s
 // CHECK-DEBIAN-SPARC64: "{{[^"]*}}clang{{[^"]*}}" "-cc1"
 // CHECK-DEBIAN-SPARC64: "-resource-dir" "[[RESOURCE_DIR:[^"]+]]"
 // CHECK-DEBIAN-SPARC64: "-isysroot" "[[SYSROOT:[^"]+]]"
 // CHECK-DEBIAN-SPARC64: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/sparc64-linux-gnu/4.9/../../../../include/c++/4.9"
 // CHECK-DEBIAN-SPARC64: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/sparc64-linux-gnu/4.9/../../../../include/sparc64-linux-gnu/c++/4.9"
 // CHECK-DEBIAN-SPARC64: "-internal-isystem" "[[SYSROOT]]/usr/lib/gcc/sparc64-linux-gnu/4.9/../../../../include/c++/4.9/backward"
 // CHECK-DEBIAN-SPARC64: "-internal-isystem" "[[SYSROOT]]/usr/local/include"
 // CHECK-DEBIAN-SPARC64: "-internal-isystem" "[[RESOURCE_DIR]]{{/|\\\\}}include"
 // CHECK-DEBIAN-SPARC64: "-internal-externc-isystem" "[[SYSROOT]]/usr/include/sparc64-linux-gnu"
 // CHECK-DEBIAN-SPARC64: "-internal-externc-isystem" "[[SYSROOT]]/include"
 // CHECK-DEBIAN-SPARC64: "-internal-externc-isystem" "[[SYSROOT]]/usr/include"

test/Driver/mips-cs.cpp

 // Check frontend and linker invocations on Mentor Graphics MIPS toolchain.
 //
 // = Big-endian, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_cs_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_cs_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-HF-32 %s
 // CHECK-BE-HF-32: "-internal-isystem"
 // CHECK-BE-HF-32: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
 // CHECK-BE-HF-32: "-internal-isystem"
 // CHECK-BE-HF-32: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu"
 // CHECK-BE-HF-32: "-internal-isystem"
 // CHECK-BE-HF-32: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
 // CHECK-BE-HF-32: "-internal-externc-isystem"

 // CHECK-BE-HF-32: "-L[[TC]]/../../../../mips-linux-gnu/libc/lib"
 // CHECK-BE-HF-32: "-L[[TC]]/../../../../mips-linux-gnu/libc/usr/lib"
 // CHECK-BE-HF-32: "[[TC]]{{/|\\\\}}crtend.o"
 // CHECK-BE-HF-32: "[[TC]]/../../../../mips-linux-gnu/libc/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, hard float, uclibc
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -muclibc \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_cs_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_cs_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-UC-HF-32 %s
 // CHECK-BE-UC-HF-32: "-internal-isystem"
 // CHECK-BE-UC-HF-32: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
 // CHECK-BE-UC-HF-32: "-internal-isystem"
 // CHECK-BE-UC-HF-32: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/uclibc"
 // CHECK-BE-UC-HF-32: "-internal-isystem"
 // CHECK-BE-UC-HF-32: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
 // CHECK-BE-UC-HF-32: "-internal-externc-isystem"

 // CHECK-BE-UC-HF-32: "-L[[TC]]/../../../../mips-linux-gnu/libc/uclibc/lib/../lib"
 // CHECK-BE-UC-HF-32: "-L[[TC]]/../../../../mips-linux-gnu/libc/uclibc/usr/lib/../lib"
 // CHECK-BE-UC-HF-32: "[[TC]]/uclibc{{/|\\\\}}crtend.o"
 // CHECK-BE-UC-HF-32: "[[TC]]/../../../../mips-linux-gnu/libc/uclibc/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, hard float, mips16
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mips16 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_cs_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_cs_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-HF-16 %s
 // CHECK-BE-HF-16: "-internal-isystem"
 // CHECK-BE-HF-16: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
 // CHECK-BE-HF-16: "-internal-isystem"
 // CHECK-BE-HF-16: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/mips16"
 // CHECK-BE-HF-16: "-internal-isystem"
 // CHECK-BE-HF-16: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
 // CHECK-BE-HF-16: "-internal-externc-isystem"

 // CHECK-BE-HF-16: "-L[[TC]]/../../../../mips-linux-gnu/libc/mips16/lib/../lib"
 // CHECK-BE-HF-16: "-L[[TC]]/../../../../mips-linux-gnu/libc/mips16/usr/lib/../lib"
 // CHECK-BE-HF-16: "[[TC]]/mips16{{/|\\\\}}crtend.o"
 // CHECK-BE-HF-16: "[[TC]]/../../../../mips-linux-gnu/libc/mips16/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, hard float, mmicromips
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mmicromips \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_cs_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_cs_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-HF-MICRO %s
 // CHECK-BE-HF-MICRO: "-internal-isystem"
 // CHECK-BE-HF-MICRO: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
 // CHECK-BE-HF-MICRO: "-internal-isystem"
 // CHECK-BE-HF-MICRO: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/micromips"
 // CHECK-BE-HF-MICRO: "-internal-isystem"
 // CHECK-BE-HF-MICRO: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
 // CHECK-BE-HF-MICRO: "-internal-externc-isystem"

 // CHECK-BE-HF-MICRO: "-L[[TC]]/../../../../mips-linux-gnu/libc/micromips/lib/../lib"
 // CHECK-BE-HF-MICRO: "-L[[TC]]/../../../../mips-linux-gnu/libc/micromips/usr/lib/../lib"
 // CHECK-BE-HF-MICRO: "[[TC]]/micromips{{/|\\\\}}crtend.o"
 // CHECK-BE-HF-MICRO: "[[TC]]/../../../../mips-linux-gnu/libc/micromips/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, hard float, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_cs_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_cs_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-HF-NAN %s
 // CHECK-BE-HF-NAN: "-internal-isystem"
 // CHECK-BE-HF-NAN: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
 // CHECK-BE-HF-NAN: "-internal-isystem"
 // CHECK-BE-HF-NAN: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/nan2008"
 // CHECK-BE-HF-NAN: "-internal-isystem"
 // CHECK-BE-HF-NAN: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
 // CHECK-BE-HF-NAN: "-internal-externc-isystem"

 // CHECK-BE-HF-NAN: "-L[[TC]]/../../../../mips-linux-gnu/libc/nan2008/lib/../lib"
 // CHECK-BE-HF-NAN: "-L[[TC]]/../../../../mips-linux-gnu/libc/nan2008/usr/lib/../lib"
 // CHECK-BE-HF-NAN: "[[TC]]/nan2008{{/|\\\\}}crtend.o"
 // CHECK-BE-HF-NAN: "[[TC]]/../../../../mips-linux-gnu/libc/nan2008/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, hard float, uclibc, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -muclibc -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_cs_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_cs_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-UC-HF-NAN %s
 // CHECK-BE-UC-HF-NAN: "-internal-isystem"
 // CHECK-BE-UC-HF-NAN: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
 // CHECK-BE-UC-HF-NAN: "-internal-isystem"
 // CHECK-BE-UC-HF-NAN: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/uclibc/nan2008"
 // CHECK-BE-UC-HF-NAN: "-internal-isystem"
 // CHECK-BE-UC-HF-NAN: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
 // CHECK-BE-UC-HF-NAN: "-internal-externc-isystem"

 // CHECK-BE-UC-HF-NAN: "-L[[TC]]/../../../../mips-linux-gnu/libc/uclibc/nan2008/lib/../lib"
 // CHECK-BE-UC-HF-NAN: "-L[[TC]]/../../../../mips-linux-gnu/libc/uclibc/nan2008/usr/lib/../lib"
 // CHECK-BE-UC-HF-NAN: "[[TC]]/uclibc/nan2008{{/|\\\\}}crtend.o"
 // CHECK-BE-UC-HF-NAN: "[[TC]]/../../../../mips-linux-gnu/libc/uclibc/nan2008/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, soft float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -msoft-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_cs_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_cs_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-SF-32 %s
 // CHECK-BE-SF-32: "-internal-isystem"
 // CHECK-BE-SF-32: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
 // CHECK-BE-SF-32: "-internal-isystem"
 // CHECK-BE-SF-32: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/soft-float"
 // CHECK-BE-SF-32: "-internal-isystem"
 // CHECK-BE-SF-32: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
 // CHECK-BE-SF-32: "-internal-externc-isystem"

 // CHECK-BE-SF-32: "-L[[TC]]/../../../../mips-linux-gnu/libc/soft-float/lib/../lib"
 // CHECK-BE-SF-32: "-L[[TC]]/../../../../mips-linux-gnu/libc/soft-float/usr/lib/../lib"
 // CHECK-BE-SF-32: "[[TC]]/soft-float{{/|\\\\}}crtend.o"
 // CHECK-BE-SF-32: "[[TC]]/../../../../mips-linux-gnu/libc/soft-float/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, soft float, uclibc
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -muclibc -msoft-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_cs_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_cs_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-UC-SF-32 %s
 // CHECK-BE-UC-SF-32: "-internal-isystem"
 // CHECK-BE-UC-SF-32: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
 // CHECK-BE-UC-SF-32: "-internal-isystem"
 // CHECK-BE-UC-SF-32: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/uclibc/soft-float"
 // CHECK-BE-UC-SF-32: "-internal-isystem"
 // CHECK-BE-UC-SF-32: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
 // CHECK-BE-UC-SF-32: "-internal-externc-isystem"

 // CHECK-BE-UC-SF-32: "-L[[TC]]/../../../../mips-linux-gnu/libc/uclibc/soft-float/lib/../lib"
 // CHECK-BE-UC-SF-32: "-L[[TC]]/../../../../mips-linux-gnu/libc/uclibc/soft-float/usr/lib/../lib"
 // CHECK-BE-UC-SF-32: "[[TC]]/uclibc/soft-float{{/|\\\\}}crtend.o"
 // CHECK-BE-UC-SF-32: "[[TC]]/../../../../mips-linux-gnu/libc/uclibc/soft-float/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, soft float, mips16
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -msoft-float -mips16 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_cs_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_cs_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-SF-16 %s
 // CHECK-BE-SF-16: "-internal-isystem"
 // CHECK-BE-SF-16: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
 // CHECK-BE-SF-16: "-internal-isystem"
 // CHECK-BE-SF-16: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/mips16/soft-float"
 // CHECK-BE-SF-16: "-internal-isystem"
 // CHECK-BE-SF-16: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
 // CHECK-BE-SF-16: "-internal-externc-isystem"

 // CHECK-BE-SF-16: "-L[[TC]]/../../../../mips-linux-gnu/libc/mips16/soft-float/lib/../lib"
 // CHECK-BE-SF-16: "-L[[TC]]/../../../../mips-linux-gnu/libc/mips16/soft-float/usr/lib/../lib"
 // CHECK-BE-SF-16: "[[TC]]/mips16/soft-float{{/|\\\\}}crtend.o"
 // CHECK-BE-SF-16: "[[TC]]/../../../../mips-linux-gnu/libc/mips16/soft-float/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, soft float, micromips
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -msoft-float -mmicromips \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_cs_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_cs_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-SF-MICRO %s
 // CHECK-BE-SF-MICRO: "-internal-isystem"
 // CHECK-BE-SF-MICRO: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
 // CHECK-BE-SF-MICRO: "-internal-isystem"
 // CHECK-BE-SF-MICRO: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/micromips/soft-float"
 // CHECK-BE-SF-MICRO: "-internal-isystem"
 // CHECK-BE-SF-MICRO: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
 // CHECK-BE-SF-MICRO: "-internal-externc-isystem"

 // CHECK-BE-SF-MICRO: "-L[[TC]]/../../../../mips-linux-gnu/libc/micromips/soft-float/lib/../lib"
 // CHECK-BE-SF-MICRO: "-L[[TC]]/../../../../mips-linux-gnu/libc/micromips/soft-float/usr/lib/../lib"
 // CHECK-BE-SF-MICRO: "[[TC]]/micromips/soft-float{{/|\\\\}}crtend.o"
 // CHECK-BE-SF-MICRO: "[[TC]]/../../../../mips-linux-gnu/libc/micromips/soft-float/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, hard float, 64-bit
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64-linux-gnu \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_cs_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_cs_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-HF-64 %s
 // CHECK-BE-HF-64: "-internal-isystem"
 // CHECK-BE-HF-64: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
 // CHECK-BE-HF-64: "-internal-isystem"
 // CHECK-BE-HF-64: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/64"
 // CHECK-BE-HF-64: "-internal-isystem"
 // CHECK-BE-HF-64: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
 // CHECK-BE-HF-64: "-internal-externc-isystem"

 // CHECK-BE-HF-64: "-L[[TC]]/../../../../mips-linux-gnu/libc/usr/lib/../lib64"
 // CHECK-BE-HF-64-NOT: "-L[[TC]]"
 // CHECK-BE-HF-64: "{{.*}}/lib/gcc/mips-linux-gnu/4.6.3/64{{/|\\\\}}crtend.o"
 // CHECK-BE-HF-64: "[[TC]]/../../../../mips-linux-gnu/libc/usr/lib/../lib64{{/|\\\\}}crtn.o"
 //
 // = Big-endian, soft float, 64-bit
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64-linux-gnu -msoft-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_cs_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_cs_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-SF-64 %s
 // CHECK-BE-SF-64: "-internal-isystem"
 // CHECK-BE-SF-64: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
 // CHECK-BE-SF-64: "-internal-isystem"
 // CHECK-BE-SF-64: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/soft-float/64"
 // CHECK-BE-SF-64: "-internal-isystem"
 // CHECK-BE-SF-64: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
 // CHECK-BE-SF-64: "-internal-externc-isystem"

 // CHECK-BE-SF-64: "-L[[TC]]/../../../../mips-linux-gnu/libc/soft-float/usr/lib/../lib64"
 // CHECK-BE-SF-64-NOT: "-L[[TC]]"
 // CHECK-BE-SF-64: "[[TC]]/soft-float/64{{/|\\\\}}crtend.o"
 // CHECK-BE-SF-64: "[[TC]]/../../../../mips-linux-gnu/libc/soft-float/usr/lib/../lib64{{/|\\\\}}crtn.o"
 //
 // = Little-endian, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_cs_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_cs_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-HF-32 %s
 // CHECK-EL-HF-32: "-internal-isystem"
 // CHECK-EL-HF-32: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
 // CHECK-EL-HF-32: "-internal-isystem"
 // CHECK-EL-HF-32: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/el"
 // CHECK-EL-HF-32: "-internal-isystem"
 // CHECK-EL-HF-32: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
 // CHECK-EL-HF-32: "-internal-externc-isystem"

 // CHECK-EL-HF-32: "-L[[TC]]/../../../../mips-linux-gnu/libc/el/lib/../lib"
 // CHECK-EL-HF-32: "-L[[TC]]/../../../../mips-linux-gnu/libc/el/usr/lib/../lib"
 // CHECK-EL-HF-32: "[[TC]]/el{{/|\\\\}}crtend.o"
 // CHECK-EL-HF-32: "[[TC]]/../../../../mips-linux-gnu/libc/el/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, hard float, uclibc
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mhard-float -muclibc \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_cs_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_cs_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-UC-HF-32 %s
 // CHECK-EL-UC-HF-32: "-internal-isystem"
 // CHECK-EL-UC-HF-32: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
 // CHECK-EL-UC-HF-32: "-internal-isystem"
 // CHECK-EL-UC-HF-32: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/uclibc/el"
 // CHECK-EL-UC-HF-32: "-internal-isystem"
 // CHECK-EL-UC-HF-32: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
 // CHECK-EL-UC-HF-32: "-internal-externc-isystem"

 // CHECK-EL-UC-HF-32: "-L[[TC]]/../../../../mips-linux-gnu/libc/uclibc/el/lib/../lib"
 // CHECK-EL-UC-HF-32: "-L[[TC]]/../../../../mips-linux-gnu/libc/uclibc/el/usr/lib/../lib"
 // CHECK-EL-UC-HF-32: "[[TC]]/uclibc/el{{/|\\\\}}crtend.o"
 // CHECK-EL-UC-HF-32: "[[TC]]/../../../../mips-linux-gnu/libc/uclibc/el/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, hard float, mips16
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mips16 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_cs_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_cs_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-HF-16 %s
 // CHECK-EL-HF-16: "-internal-isystem"
 // CHECK-EL-HF-16: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
 // CHECK-EL-HF-16: "-internal-isystem"
 // CHECK-EL-HF-16: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/mips16/el"
 // CHECK-EL-HF-16: "-internal-isystem"
 // CHECK-EL-HF-16: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
 // CHECK-EL-HF-16: "-internal-externc-isystem"

 // CHECK-EL-HF-16: "-L[[TC]]/../../../../mips-linux-gnu/libc/mips16/el/lib/../lib"
 // CHECK-EL-HF-16: "-L[[TC]]/../../../../mips-linux-gnu/libc/mips16/el/usr/lib/../lib"
 // CHECK-EL-HF-16: "[[TC]]/mips16/el{{/|\\\\}}crtend.o"
 // CHECK-EL-HF-16: "[[TC]]/../../../../mips-linux-gnu/libc/mips16/el/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, hard float, micromips
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mmicromips \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_cs_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_cs_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-HF-MICRO %s
 // CHECK-EL-HF-MICRO: "-internal-isystem"
 // CHECK-EL-HF-MICRO: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
 // CHECK-EL-HF-MICRO: "-internal-isystem"
 // CHECK-EL-HF-MICRO: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/micromips/el"
 // CHECK-EL-HF-MICRO: "-internal-isystem"
 // CHECK-EL-HF-MICRO: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
 // CHECK-EL-HF-MICRO: "-internal-externc-isystem"

 // CHECK-EL-HF-MICRO: "-L[[TC]]/../../../../mips-linux-gnu/libc/micromips/el/lib/../lib"
 // CHECK-EL-HF-MICRO: "-L[[TC]]/../../../../mips-linux-gnu/libc/micromips/el/usr/lib/../lib"
 // CHECK-EL-HF-MICRO: "[[TC]]/micromips/el{{/|\\\\}}crtend.o"
 // CHECK-EL-HF-MICRO: "[[TC]]/../../../../mips-linux-gnu/libc/micromips/el/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, hard float, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_cs_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_cs_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-HF-NAN %s
 // CHECK-EL-HF-NAN: "-internal-isystem"
 // CHECK-EL-HF-NAN: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
 // CHECK-EL-HF-NAN: "-internal-isystem"
 // CHECK-EL-HF-NAN: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/nan2008/el"
 // CHECK-EL-HF-NAN: "-internal-isystem"
 // CHECK-EL-HF-NAN: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
 // CHECK-EL-HF-NAN: "-internal-externc-isystem"

 // CHECK-EL-HF-NAN: "-L[[TC]]/../../../../mips-linux-gnu/libc/nan2008/el/lib/../lib"
 // CHECK-EL-HF-NAN: "-L[[TC]]/../../../../mips-linux-gnu/libc/nan2008/el/usr/lib/../lib"
 // CHECK-EL-HF-NAN: "[[TC]]/nan2008/el{{/|\\\\}}crtend.o"
 // CHECK-EL-HF-NAN: "[[TC]]/../../../../mips-linux-gnu/libc/nan2008/el/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, hard float, uclibc, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -muclibc -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_cs_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_cs_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-UC-HF-NAN %s
 // CHECK-EL-UC-HF-NAN: "-internal-isystem"
 // CHECK-EL-UC-HF-NAN: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
 // CHECK-EL-UC-HF-NAN: "-internal-isystem"
 // CHECK-EL-UC-HF-NAN: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/uclibc/nan2008/el"
 // CHECK-EL-UC-HF-NAN: "-internal-isystem"
 // CHECK-EL-UC-HF-NAN: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
 // CHECK-EL-UC-HF-NAN: "-internal-externc-isystem"

 // CHECK-EL-UC-HF-NAN: "-L[[TC]]/../../../../mips-linux-gnu/libc/uclibc/nan2008/el/lib/../lib"
 // CHECK-EL-UC-HF-NAN: "-L[[TC]]/../../../../mips-linux-gnu/libc/uclibc/nan2008/el/usr/lib/../lib"
 // CHECK-EL-UC-HF-NAN: "[[TC]]/uclibc/nan2008/el{{/|\\\\}}crtend.o"
 // CHECK-EL-UC-HF-NAN: "[[TC]]/../../../../mips-linux-gnu/libc/uclibc/nan2008/el/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, soft float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mfloat-abi=soft \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_cs_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_cs_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-SF-32 %s
 // CHECK-EL-SF-32: "-internal-isystem"
 // CHECK-EL-SF-32: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
 // CHECK-EL-SF-32: "-internal-isystem"
 // CHECK-EL-SF-32: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/soft-float/el"
 // CHECK-EL-SF-32: "-internal-isystem"
 // CHECK-EL-SF-32: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
 // CHECK-EL-SF-32: "-internal-externc-isystem"

 // CHECK-EL-SF-32: "-L[[TC]]/../../../../mips-linux-gnu/libc/soft-float/el/lib/../lib"
 // CHECK-EL-SF-32: "-L[[TC]]/../../../../mips-linux-gnu/libc/soft-float/el/usr/lib/../lib"
 // CHECK-EL-SF-32: "[[TC]]/soft-float/el{{/|\\\\}}crtend.o"
 // CHECK-EL-SF-32: "[[TC]]/../../../../mips-linux-gnu/libc/soft-float/el/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, soft float, uclibc
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mfloat-abi=soft -muclibc \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_cs_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_cs_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-UC-SF-32 %s
 // CHECK-EL-UC-SF-32: "-internal-isystem"
 // CHECK-EL-UC-SF-32: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
 // CHECK-EL-UC-SF-32: "-internal-isystem"
 // CHECK-EL-UC-SF-32: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/uclibc/soft-float/el"
 // CHECK-EL-UC-SF-32: "-internal-isystem"
 // CHECK-EL-UC-SF-32: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
 // CHECK-EL-UC-SF-32: "-internal-externc-isystem"

 // CHECK-EL-UC-SF-32: "-L[[TC]]/../../../../mips-linux-gnu/libc/uclibc/soft-float/el/lib/../lib"
 // CHECK-EL-UC-SF-32: "-L[[TC]]/../../../../mips-linux-gnu/libc/uclibc/soft-float/el/usr/lib/../lib"
 // CHECK-EL-UC-SF-32: "[[TC]]/uclibc/soft-float/el{{/|\\\\}}crtend.o"
 // CHECK-EL-UC-SF-32: "[[TC]]/../../../../mips-linux-gnu/libc/uclibc/soft-float/el/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, soft float, mips16
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mips16 -msoft-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_cs_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_cs_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-SF-16 %s
 // CHECK-EL-SF-16: "-internal-isystem"
 // CHECK-EL-SF-16: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
 // CHECK-EL-SF-16: "-internal-isystem"
 // CHECK-EL-SF-16: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/mips16/soft-float/el"
 // CHECK-EL-SF-16: "-internal-isystem"
 // CHECK-EL-SF-16: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
 // CHECK-EL-SF-16: "-internal-externc-isystem"

 // CHECK-EL-SF-16: "-L[[TC]]/../../../../mips-linux-gnu/libc/mips16/soft-float/el/lib/../lib"
 // CHECK-EL-SF-16: "-L[[TC]]/../../../../mips-linux-gnu/libc/mips16/soft-float/el/usr/lib/../lib"
 // CHECK-EL-SF-16: "[[TC]]/mips16/soft-float/el{{/|\\\\}}crtend.o"
 // CHECK-EL-SF-16: "[[TC]]/../../../../mips-linux-gnu/libc/mips16/soft-float/el/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, soft float, micromips
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mmicromips -msoft-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_cs_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_cs_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-SF-MICRO %s
 // CHECK-EL-SF-MICRO: "-internal-isystem"
 // CHECK-EL-SF-MICRO: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
 // CHECK-EL-SF-MICRO: "-internal-isystem"
 // CHECK-EL-SF-MICRO: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/micromips/soft-float/el"
 // CHECK-EL-SF-MICRO: "-internal-isystem"
 // CHECK-EL-SF-MICRO: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
 // CHECK-EL-SF-MICRO: "-internal-externc-isystem"

 // CHECK-EL-SF-MICRO: "-L[[TC]]/../../../../mips-linux-gnu/libc/micromips/soft-float/el/lib/../lib"
 // CHECK-EL-SF-MICRO: "-L[[TC]]/../../../../mips-linux-gnu/libc/micromips/soft-float/el/usr/lib/../lib"
 // CHECK-EL-SF-MICRO: "[[TC]]/micromips/soft-float/el{{/|\\\\}}crtend.o"
 // CHECK-EL-SF-MICRO: "[[TC]]/../../../../mips-linux-gnu/libc/micromips/soft-float/el/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, hard float, 64-bit
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64el-linux-gnu \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_cs_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_cs_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-HF-64 %s
 // CHECK-EL-HF-64: "-internal-isystem"
 // CHECK-EL-HF-64: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
 // CHECK-EL-HF-64: "-internal-isystem"
 // CHECK-EL-HF-64: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/el/64"
 // CHECK-EL-HF-64: "-internal-isystem"
 // CHECK-EL-HF-64: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
 // CHECK-EL-HF-64: "-internal-externc-isystem"

 // CHECK-EL-HF-64: "-L[[TC]]/../../../../mips-linux-gnu/libc/el/usr/lib/../lib64"
 // CHECK-EL-HF-64-NOT: "-L[[TC]]"
 // CHECK-EL-HF-64: "[[TC]]/el/64{{/|\\\\}}crtend.o"
 // CHECK-EL-HF-64: "[[TC]]/../../../../mips-linux-gnu/libc/el/usr/lib/../lib64{{/|\\\\}}crtn.o"
 //
 // = Little-endian, soft float, 64-bit
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64el-linux-gnu -msoft-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_cs_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_cs_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-SF-64 %s
 // CHECK-EL-SF-64: "-internal-isystem"
 // CHECK-EL-SF-64: "[[TC:[^"]+/lib/gcc/mips-linux-gnu/4.6.3]]/../../../../mips-linux-gnu/include/c++/4.6.3"
 // CHECK-EL-SF-64: "-internal-isystem"
 // CHECK-EL-SF-64: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/soft-float/el/64"
 // CHECK-EL-SF-64: "-internal-isystem"
 // CHECK-EL-SF-64: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/backward"
 // CHECK-EL-SF-64: "-internal-externc-isystem"

test/Driver/mips-fsf.cpp

 // Check frontend and linker invocations on FSF MIPS toolchain.
 //
 // = Big-endian, mips32, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mips32 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-HF-32 %s
 // CHECK-BE-HF-32: "-internal-isystem"
 // CHECK-BE-HF-32: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-HF-32: "-internal-isystem"
 // CHECK-BE-HF-32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips32"
 // CHECK-BE-HF-32: "-internal-isystem"
 // CHECK-BE-HF-32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-HF-32: "-internal-externc-isystem"

 // CHECK-BE-HF-32: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/mips32"
 // CHECK-BE-HF-32: "-L[[TC]]/../../../../sysroot/mips32/usr/lib/../lib"
 // CHECK-BE-HF-32: "[[TC]]/mips32{{/|\\\\}}crtend.o"
 // CHECK-BE-HF-32: "[[TC]]/../../../../sysroot/mips32/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips32, hard float, fp64
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mips32 -mfp64 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-HF64-32 %s
 // CHECK-BE-HF64-32: "-internal-isystem"
 // CHECK-BE-HF64-32: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-HF64-32: "-internal-isystem"
 // CHECK-BE-HF64-32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips32"
 // CHECK-BE-HF64-32: "-internal-isystem"
 // CHECK-BE-HF64-32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-HF64-32: "-internal-externc-isystem"

 // CHECK-BE-HF64-32: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/mips32"
 // CHECK-BE-HF64-32: "-L[[TC]]/../../../../sysroot/mips32/usr/lib/../lib"
 // CHECK-BE-HF64-32: "[[TC]]/mips32{{/|\\\\}}crtend.o"
 // CHECK-BE-HF64-32: "[[TC]]/../../../../sysroot/mips32/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips32, soft float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mips32 -msoft-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-SF-32 %s
 // CHECK-BE-SF-32: "-internal-isystem"
 // CHECK-BE-SF-32: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-SF-32: "-internal-isystem"
 // CHECK-BE-SF-32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips32/sof"
 // CHECK-BE-SF-32: "-internal-isystem"
 // CHECK-BE-SF-32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-SF-32: "-internal-externc-isystem"

 // CHECK-BE-SF-32: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/mips32/sof"
 // CHECK-BE-SF-32: "-L[[TC]]/../../../../sysroot/mips32/sof/usr/lib/../lib"
 // CHECK-BE-SF-32: "[[TC]]/mips32/sof{{/|\\\\}}crtend.o"
 // CHECK-BE-SF-32: "[[TC]]/../../../../sysroot/mips32/sof/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips16 / mips32, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mips32 -mips16 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-HF-16 %s
 // CHECK-BE-HF-16: "-internal-isystem"
 // CHECK-BE-HF-16: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-HF-16: "-internal-isystem"
 // CHECK-BE-HF-16: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips32/mips16"
 // CHECK-BE-HF-16: "-internal-isystem"
 // CHECK-BE-HF-16: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-HF-16: "-internal-externc-isystem"

 // CHECK-BE-HF-16: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/mips32/mips16"
 // CHECK-BE-HF-16: "-L[[TC]]/../../../../sysroot/mips32/mips16/usr/lib/../lib"
 // CHECK-BE-HF-16: "[[TC]]/mips32/mips16{{/|\\\\}}crtend.o"
 // CHECK-BE-HF-16: "[[TC]]/../../../../sysroot/mips32/mips16/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips16 / mips32, hard float, fp64
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mips32 -mips16 -mfp64 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-HF64-16 %s
 // CHECK-BE-HF64-16: "-internal-isystem"
 // CHECK-BE-HF64-16: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-HF64-16: "-internal-isystem"
 // CHECK-BE-HF64-16: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips32/mips16"
 // CHECK-BE-HF64-16: "-internal-isystem"
 // CHECK-BE-HF64-16: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-HF64-16: "-internal-externc-isystem"

 // CHECK-BE-HF64-16: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/mips32/mips16"
 // CHECK-BE-HF64-16: "-L[[TC]]/../../../../sysroot/mips32/mips16/usr/lib/../lib"
 // CHECK-BE-HF64-16: "[[TC]]/mips32/mips16{{/|\\\\}}crtend.o"
 // CHECK-BE-HF64-16: "[[TC]]/../../../../sysroot/mips32/mips16/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips16 / mips32, soft float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mips32 -mips16 -msoft-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-SF-16 %s
 // CHECK-BE-SF-16: "-internal-isystem"
 // CHECK-BE-SF-16: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-SF-16: "-internal-isystem"
 // CHECK-BE-SF-16: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips32/mips16/sof"
 // CHECK-BE-SF-16: "-internal-isystem"
 // CHECK-BE-SF-16: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-SF-16: "-internal-externc-isystem"

 // CHECK-BE-SF-16: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/mips32/mips16/sof"
 // CHECK-BE-SF-16: "-L[[TC]]/../../../../sysroot/mips32/mips16/sof/usr/lib/../lib"
 // CHECK-BE-SF-16: "[[TC]]/mips32/mips16/sof{{/|\\\\}}crtend.o"
 // CHECK-BE-SF-16: "[[TC]]/../../../../sysroot/mips32/mips16/sof/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips32 / mips16, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mips32 -mips16 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-NAN-16 %s
 // CHECK-BE-NAN-16: "-internal-isystem"
 // CHECK-BE-NAN-16: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-NAN-16: "-internal-isystem"
 // CHECK-BE-NAN-16: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips32/mips16/nan2008"
 // CHECK-BE-NAN-16: "-internal-isystem"
 // CHECK-BE-NAN-16: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-NAN-16: "-internal-externc-isystem"

 // CHECK-BE-NAN-16: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/mips32/mips16/nan2008"
 // CHECK-BE-NAN-16: "-L[[TC]]/../../../../sysroot/mips32/mips16/nan2008/usr/lib/../lib"
 // CHECK-BE-NAN-16: "[[TC]]/mips32/mips16/nan2008{{/|\\\\}}crtend.o"
 // CHECK-BE-NAN-16: "[[TC]]/../../../../sysroot/mips32/mips16/nan2008/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips32 / mips16, fp64, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mips32 -mips16 -mfp64 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-NAN64-16 %s
 // CHECK-BE-NAN64-16: "-internal-isystem"
 // CHECK-BE-NAN64-16: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-NAN64-16: "-internal-isystem"
 // CHECK-BE-NAN64-16: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips32/mips16/nan2008"
 // CHECK-BE-NAN64-16: "-internal-isystem"
 // CHECK-BE-NAN64-16: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-NAN64-16: "-internal-externc-isystem"

 // CHECK-BE-NAN64-16: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/mips32/mips16/nan2008"
 // CHECK-BE-NAN64-16: "-L[[TC]]/../../../../sysroot/mips32/mips16/nan2008/usr/lib/../lib"
 // CHECK-BE-NAN64-16: "[[TC]]/mips32/mips16/nan2008{{/|\\\\}}crtend.o"
 // CHECK-BE-NAN64-16: "[[TC]]/../../../../sysroot/mips32/mips16/nan2008/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips32, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mips32 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-NAN-32 %s
 // CHECK-BE-NAN-32: "-internal-isystem"
 // CHECK-BE-NAN-32: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-NAN-32: "-internal-isystem"
 // CHECK-BE-NAN-32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips32/nan2008"
 // CHECK-BE-NAN-32: "-internal-isystem"
 // CHECK-BE-NAN-32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-NAN-32: "-internal-externc-isystem"

 // CHECK-BE-NAN-32: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/mips32/nan2008"
 // CHECK-BE-NAN-32: "-L[[TC]]/../../../../sysroot/mips32/nan2008/usr/lib/../lib"
 // CHECK-BE-NAN-32: "[[TC]]/mips32/nan2008{{/|\\\\}}crtend.o"
 // CHECK-BE-NAN-32: "[[TC]]/../../../../sysroot/mips32/nan2008/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips32, fp64, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mips32 -mfp64 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-NAN64-32 %s
 // CHECK-BE-NAN64-32: "-internal-isystem"
 // CHECK-BE-NAN64-32: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-NAN64-32: "-internal-isystem"
 // CHECK-BE-NAN64-32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips32/nan2008"
 // CHECK-BE-NAN64-32: "-internal-isystem"
 // CHECK-BE-NAN64-32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-NAN64-32: "-internal-externc-isystem"

 // CHECK-BE-NAN64-32: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/mips32/nan2008"
 // CHECK-BE-NAN64-32: "-L[[TC]]/../../../../sysroot/mips32/nan2008/usr/lib/../lib"
 // CHECK-BE-NAN64-32: "[[TC]]/mips32/nan2008{{/|\\\\}}crtend.o"
 // CHECK-BE-NAN64-32: "[[TC]]/../../../../sysroot/mips32/nan2008/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips32r2, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mips32r2 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-HF-32R2 %s
 // CHECK-BE-HF-32R2: "-internal-isystem"
 // CHECK-BE-HF-32R2: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-HF-32R2: "-internal-isystem"
 // CHECK-BE-HF-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu"
 // CHECK-BE-HF-32R2: "-internal-isystem"
 // CHECK-BE-HF-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-HF-32R2: "-internal-externc-isystem"

 // CHECK-BE-HF-32R2: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib"
 // CHECK-BE-HF-32R2: "-L[[TC]]/../../../../sysroot/usr/lib/../lib"
 // CHECK-BE-HF-32R2: "[[TC]]{{/|\\\\}}crtend.o"
 // CHECK-BE-HF-32R2: "[[TC]]/../../../../sysroot/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips32r2, hard float, uclibc
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mips32r2 -mhard-float -muclibc \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-UC-HF-32R2 %s
 // CHECK-BE-UC-HF-32R2: "-internal-isystem"
 // CHECK-BE-UC-HF-32R2: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-UC-HF-32R2: "-internal-isystem"
 // CHECK-BE-UC-HF-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/uclibc"
 // CHECK-BE-UC-HF-32R2: "-internal-isystem"
 // CHECK-BE-UC-HF-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-UC-HF-32R2: "-internal-externc-isystem"

 // CHECK-BE-UC-HF-32R2: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/uclibc"
 // CHECK-BE-UC-HF-32R2: "-L[[TC]]/../../../../sysroot/uclibc/usr/lib/../lib"
 // CHECK-BE-UC-HF-32R2: "[[TC]]/uclibc{{/|\\\\}}crtend.o"
 // CHECK-BE-UC-HF-32R2: "[[TC]]/../../../../sysroot/uclibc/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips32r2, fp64, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mips32r2 -mfp64 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-HF64-32R2 %s
 // CHECK-BE-HF64-32R2: "-internal-isystem"
 // CHECK-BE-HF64-32R2: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-HF64-32R2: "-internal-isystem"
 // CHECK-BE-HF64-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu"
 // CHECK-BE-HF64-32R2: "-internal-isystem"
 // CHECK-BE-HF64-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-HF64-32R2: "-internal-externc-isystem"

 // CHECK-BE-HF64-32R2: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib"
 // CHECK-BE-HF64-32R2: "-L[[TC]]/../../../../sysroot/usr/lib/../lib"
 // CHECK-BE-HF64-32R2: "[[TC]]{{/|\\\\}}crtend.o"
 // CHECK-BE-HF64-32R2: "[[TC]]/../../../../sysroot/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips32r2, soft float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mips32r2 -msoft-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-SF-32R2 %s
 // CHECK-BE-SF-32R2: "-internal-isystem"
 // CHECK-BE-SF-32R2: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-SF-32R2: "-internal-isystem"
 // CHECK-BE-SF-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/sof"
 // CHECK-BE-SF-32R2: "-internal-isystem"
 // CHECK-BE-SF-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-SF-32R2: "-internal-externc-isystem"

 // CHECK-BE-SF-32R2: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/sof"
 // CHECK-BE-SF-32R2: "-L[[TC]]/../../../../sysroot/sof/usr/lib/../lib"
 // CHECK-BE-SF-32R2: "[[TC]]/sof{{/|\\\\}}crtend.o"
 // CHECK-BE-SF-32R2: "[[TC]]/../../../../sysroot/sof/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips32r2, soft float, uclibc
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mips32r2 -msoft-float -muclibc \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-UC-SF-32R2 %s
 // CHECK-BE-UC-SF-32R2: "-internal-isystem"
 // CHECK-BE-UC-SF-32R2: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-UC-SF-32R2: "-internal-isystem"
 // CHECK-BE-UC-SF-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/uclibc/sof"
 // CHECK-BE-UC-SF-32R2: "-internal-isystem"
 // CHECK-BE-UC-SF-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-UC-SF-32R2: "-internal-externc-isystem"

 // CHECK-BE-UC-SF-32R2: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/uclibc/sof"
 // CHECK-BE-UC-SF-32R2: "-L[[TC]]/../../../../sysroot/uclibc/sof/usr/lib/../lib"
 // CHECK-BE-UC-SF-32R2: "[[TC]]/uclibc/sof{{/|\\\\}}crtend.o"
 // CHECK-BE-UC-SF-32R2: "[[TC]]/../../../../sysroot/uclibc/sof/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips32r2 / mips16, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mips32r2 -mips16 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-HF-16R2 %s
 // CHECK-BE-HF-16R2: "-internal-isystem"
 // CHECK-BE-HF-16R2: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-HF-16R2: "-internal-isystem"
 // CHECK-BE-HF-16R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips16"
 // CHECK-BE-HF-16R2: "-internal-isystem"
 // CHECK-BE-HF-16R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-HF-16R2: "-internal-externc-isystem"

 // CHECK-BE-HF-16R2: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/mips16"
 // CHECK-BE-HF-16R2: "-L[[TC]]/../../../../sysroot/mips16/usr/lib/../lib"
 // CHECK-BE-HF-16R2: "[[TC]]/mips16{{/|\\\\}}crtend.o"
 // CHECK-BE-HF-16R2: "[[TC]]/../../../../sysroot/mips16/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips32r2 / mips16, fp64, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mips32r2 -mips16 -mfp64 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-HF64-16R2 %s
 // CHECK-BE-HF64-16R2: "-internal-isystem"
 // CHECK-BE-HF64-16R2: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-HF64-16R2: "-internal-isystem"
 // CHECK-BE-HF64-16R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips16"
 // CHECK-BE-HF64-16R2: "-internal-isystem"
 // CHECK-BE-HF64-16R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-HF64-16R2: "-internal-externc-isystem"

 // CHECK-BE-HF64-16R2: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/mips16"
 // CHECK-BE-HF64-16R2: "-L[[TC]]/../../../../sysroot/mips16/usr/lib/../lib"
 // CHECK-BE-HF64-16R2: "[[TC]]/mips16{{/|\\\\}}crtend.o"
 // CHECK-BE-HF64-16R2: "[[TC]]/../../../../sysroot/mips16/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips32r2 / mips16, soft float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mips32r2 -mips16 -msoft-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-SF-16R2 %s
 // CHECK-BE-SF-16R2: "-internal-isystem"
 // CHECK-BE-SF-16R2: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-SF-16R2: "-internal-isystem"
 // CHECK-BE-SF-16R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips16/sof"
 // CHECK-BE-SF-16R2: "-internal-isystem"
 // CHECK-BE-SF-16R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-SF-16R2: "-internal-externc-isystem"

 // CHECK-BE-SF-16R2: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/mips16/sof"
 // CHECK-BE-SF-16R2: "-L[[TC]]/../../../../sysroot/mips16/sof/usr/lib/../lib"
 // CHECK-BE-SF-16R2: "[[TC]]/mips16/sof{{/|\\\\}}crtend.o"
 // CHECK-BE-SF-16R2: "[[TC]]/../../../../sysroot/mips16/sof/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips32r2 / mips16, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mips32r2 -mips16 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-NAN-16R2 %s
 // CHECK-BE-NAN-16R2: "-internal-isystem"
 // CHECK-BE-NAN-16R2: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-NAN-16R2: "-internal-isystem"
 // CHECK-BE-NAN-16R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips16/nan2008"
 // CHECK-BE-NAN-16R2: "-internal-isystem"
 // CHECK-BE-NAN-16R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-NAN-16R2: "-internal-externc-isystem"

 // CHECK-BE-NAN-16R2: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/mips16/nan2008"
 // CHECK-BE-NAN-16R2: "-L[[TC]]/../../../../sysroot/mips16/nan2008/usr/lib/../lib"
 // CHECK-BE-NAN-16R2: "[[TC]]/mips16/nan2008{{/|\\\\}}crtend.o"
 // CHECK-BE-NAN-16R2: "[[TC]]/../../../../sysroot/mips16/nan2008/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips32r2 / mips16, fp64, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mips32r2 -mips16 -mfp64 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-NAN64-16R2 %s
 // CHECK-BE-NAN64-16R2: "-internal-isystem"
 // CHECK-BE-NAN64-16R2: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-NAN64-16R2: "-internal-isystem"
 // CHECK-BE-NAN64-16R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips16/nan2008"
 // CHECK-BE-NAN64-16R2: "-internal-isystem"
 // CHECK-BE-NAN64-16R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-NAN64-16R2: "-internal-externc-isystem"

 // CHECK-BE-NAN64-16R2: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/mips16/nan2008"
 // CHECK-BE-NAN64-16R2: "-L[[TC]]/../../../../sysroot/mips16/nan2008/usr/lib/../lib"
 // CHECK-BE-NAN64-16R2: "[[TC]]/mips16/nan2008{{/|\\\\}}crtend.o"
 // CHECK-BE-NAN64-16R2: "[[TC]]/../../../../sysroot/mips16/nan2008/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips32r2, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mips32r2 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-NAN-32R2 %s
 // CHECK-BE-NAN-32R2: "-internal-isystem"
 // CHECK-BE-NAN-32R2: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-NAN-32R2: "-internal-isystem"
 // CHECK-BE-NAN-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/nan2008"
 // CHECK-BE-NAN-32R2: "-internal-isystem"
 // CHECK-BE-NAN-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-NAN-32R2: "-internal-externc-isystem"

 // CHECK-BE-NAN-32R2: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/nan2008"
 // CHECK-BE-NAN-32R2: "-L[[TC]]/../../../../sysroot/nan2008/usr/lib/../lib"
 // CHECK-BE-NAN-32R2: "[[TC]]/nan2008{{/|\\\\}}crtend.o"
 // CHECK-BE-NAN-32R2: "[[TC]]/../../../../sysroot/nan2008/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips32r2, nan2008, uclibc
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mips32r2 -mnan=2008 -muclibc \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-UC-NAN-32R2 %s
 // CHECK-BE-UC-NAN-32R2: "-internal-isystem"
 // CHECK-BE-UC-NAN-32R2: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-UC-NAN-32R2: "-internal-isystem"
 // CHECK-BE-UC-NAN-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/uclibc/nan2008"
 // CHECK-BE-UC-NAN-32R2: "-internal-isystem"
 // CHECK-BE-UC-NAN-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-UC-NAN-32R2: "-internal-externc-isystem"

 // CHECK-BE-UC-NAN-32R2: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/uclibc/nan2008"
 // CHECK-BE-UC-NAN-32R2: "-L[[TC]]/../../../../sysroot/uclibc/nan2008/usr/lib/../lib"
 // CHECK-BE-UC-NAN-32R2: "[[TC]]/uclibc/nan2008{{/|\\\\}}crtend.o"
 // CHECK-BE-UC-NAN-32R2: "[[TC]]/../../../../sysroot/uclibc/nan2008/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips32r2, fp64, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mips32r2 -mfp64 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-NAN64-32R2 %s
 // CHECK-BE-NAN64-32R2: "-internal-isystem"
 // CHECK-BE-NAN64-32R2: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-NAN64-32R2: "-internal-isystem"
 // CHECK-BE-NAN64-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/nan2008"
 // CHECK-BE-NAN64-32R2: "-internal-isystem"
 // CHECK-BE-NAN64-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-NAN64-32R2: "-internal-externc-isystem"

 // CHECK-BE-NAN64-32R2: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/nan2008"
 // CHECK-BE-NAN64-32R2: "-L[[TC]]/../../../../sysroot/nan2008/usr/lib/../lib"
 // CHECK-BE-NAN64-32R2: "[[TC]]/nan2008{{/|\\\\}}crtend.o"
 // CHECK-BE-NAN64-32R2: "[[TC]]/../../../../sysroot/nan2008/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, default (mips32r2), fp64, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mfp64 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-NAN64-32R2-DEF %s
 // CHECK-BE-NAN64-32R2-DEF: "-internal-isystem"
 // CHECK-BE-NAN64-32R2-DEF: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-NAN64-32R2-DEF: "-internal-isystem"
 // CHECK-BE-NAN64-32R2-DEF: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/nan2008"
 // CHECK-BE-NAN64-32R2-DEF: "-internal-isystem"
 // CHECK-BE-NAN64-32R2-DEF: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-NAN64-32R2-DEF: "-internal-externc-isystem"

 // CHECK-BE-NAN64-32R2-DEF: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/nan2008"
 // CHECK-BE-NAN64-32R2-DEF: "-L[[TC]]/../../../../sysroot/nan2008/usr/lib/../lib"
 // CHECK-BE-NAN64-32R2-DEF: "[[TC]]/nan2008{{/|\\\\}}crtend.o"
 // CHECK-BE-NAN64-32R2-DEF: "[[TC]]/../../../../sysroot/nan2008/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, micromips, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mmicromips -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-HF-MM %s
 // CHECK-BE-HF-MM: "-internal-isystem"
 // CHECK-BE-HF-MM: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-HF-MM: "-internal-isystem"
 // CHECK-BE-HF-MM: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/micromips"
 // CHECK-BE-HF-MM: "-internal-isystem"
 // CHECK-BE-HF-MM: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-HF-MM: "-internal-externc-isystem"

 // CHECK-BE-HF-MM: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/micromips"
 // CHECK-BE-HF-MM: "-L[[TC]]/../../../../sysroot/micromips/usr/lib/../lib"
 // CHECK-BE-HF-MM: "[[TC]]/micromips{{/|\\\\}}crtend.o"
 // CHECK-BE-HF-MM: "[[TC]]/../../../../sysroot/micromips/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, micromips, fp64, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mmicromips -mfp64 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-HF64-MM %s
 // CHECK-BE-HF64-MM: "-internal-isystem"
 // CHECK-BE-HF64-MM: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-HF64-MM: "-internal-isystem"
 // CHECK-BE-HF64-MM: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/micromips"
 // CHECK-BE-HF64-MM: "-internal-isystem"
 // CHECK-BE-HF64-MM: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-HF64-MM: "-internal-externc-isystem"

 // CHECK-BE-HF64-MM: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/micromips"
 // CHECK-BE-HF64-MM: "-L[[TC]]/../../../../sysroot/micromips/usr/lib/../lib"
 // CHECK-BE-HF64-MM: "[[TC]]/micromips{{/|\\\\}}crtend.o"
 // CHECK-BE-HF64-MM: "[[TC]]/../../../../sysroot/micromips/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, micromips, soft float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mmicromips -msoft-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-SF-MM %s
 // CHECK-BE-SF-MM: "-internal-isystem"
 // CHECK-BE-SF-MM: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-SF-MM: "-internal-isystem"
 // CHECK-BE-SF-MM: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/micromips/sof"
 // CHECK-BE-SF-MM: "-internal-isystem"
 // CHECK-BE-SF-MM: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-SF-MM: "-internal-externc-isystem"

 // CHECK-BE-SF-MM: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/micromips/sof"
 // CHECK-BE-SF-MM: "-L[[TC]]/../../../../sysroot/micromips/sof/usr/lib/../lib"
 // CHECK-BE-SF-MM: "[[TC]]/micromips/sof{{/|\\\\}}crtend.o"
 // CHECK-BE-SF-MM: "[[TC]]/../../../../sysroot/micromips/sof/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, micromips, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mmicromips -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-NAN-MM %s
 // CHECK-BE-NAN-MM: "-internal-isystem"
 // CHECK-BE-NAN-MM: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-NAN-MM: "-internal-isystem"
 // CHECK-BE-NAN-MM: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/micromips/nan2008"
 // CHECK-BE-NAN-MM: "-internal-isystem"
 // CHECK-BE-NAN-MM: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-NAN-MM: "-internal-externc-isystem"

 // CHECK-BE-NAN-MM: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/micromips/nan2008"
 // CHECK-BE-NAN-MM: "-L[[TC]]/../../../../sysroot/micromips/nan2008/usr/lib/../lib"
 // CHECK-BE-NAN-MM: "[[TC]]/micromips/nan2008{{/|\\\\}}crtend.o"
 // CHECK-BE-NAN-MM: "[[TC]]/../../../../sysroot/micromips/nan2008/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, micromips, fp64, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mmicromips -mfp64 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-NAN64-MM %s
 // CHECK-BE-NAN64-MM: "-internal-isystem"
 // CHECK-BE-NAN64-MM: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-NAN64-MM: "-internal-isystem"
 // CHECK-BE-NAN64-MM: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/micromips/nan2008"
 // CHECK-BE-NAN64-MM: "-internal-isystem"
 // CHECK-BE-NAN64-MM: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-NAN64-MM: "-internal-externc-isystem"

 // CHECK-BE-NAN64-MM: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/micromips/nan2008"
 // CHECK-BE-NAN64-MM: "-L[[TC]]/../../../../sysroot/micromips/nan2008/usr/lib/../lib"
 // CHECK-BE-NAN64-MM: "[[TC]]/micromips/nan2008{{/|\\\\}}crtend.o"
 // CHECK-BE-NAN64-MM: "[[TC]]/../../../../sysroot/micromips/nan2008/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips64, ABI n32, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64-linux-gnu -mips64 -mabi=n32 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-HF-64-N32 %s
 // CHECK-BE-HF-64-N32: "-internal-isystem"
 // CHECK-BE-HF-64-N32: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-HF-64-N32: "-internal-isystem"
 // CHECK-BE-HF-64-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64"
 // CHECK-BE-HF-64-N32: "-internal-isystem"
 // CHECK-BE-HF-64-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-HF-64-N32: "-internal-externc-isystem"

 // CHECK-BE-HF-64-N32: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64"
 // CHECK-BE-HF-64-N32: "-L[[TC]]/../../../../sysroot/mips64/usr/lib"
 // CHECK-BE-HF-64-N32: "[[TC]]/mips64{{/|\\\\}}crtend.o"
 // CHECK-BE-HF-64-N32: "[[TC]]/../../../../sysroot/mips64/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips64, ABI n32, fp64, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64-linux-gnu -mips64 -mabi=n32 -mfp64 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-HF64-64-N32 %s
 // CHECK-BE-HF64-64-N32: "-internal-isystem"
 // CHECK-BE-HF64-64-N32: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-HF64-64-N32: "-internal-isystem"
 // CHECK-BE-HF64-64-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64"
 // CHECK-BE-HF64-64-N32: "-internal-isystem"
 // CHECK-BE-HF64-64-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-HF64-64-N32: "-internal-externc-isystem"

 // CHECK-BE-HF64-64-N32: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64"
 // CHECK-BE-HF64-64-N32: "-L[[TC]]/../../../../sysroot/mips64/usr/lib"
 // CHECK-BE-HF64-64-N32: "[[TC]]/mips64{{/|\\\\}}crtend.o"
 // CHECK-BE-HF64-64-N32: "[[TC]]/../../../../sysroot/mips64/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips64, ABI n32, soft float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64-linux-gnu -mips64 -mabi=n32 -msoft-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-SF-64-N32 %s
 // CHECK-BE-SF-64-N32: "-internal-isystem"
 // CHECK-BE-SF-64-N32: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-SF-64-N32: "-internal-isystem"
 // CHECK-BE-SF-64-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64/sof"
 // CHECK-BE-SF-64-N32: "-internal-isystem"
 // CHECK-BE-SF-64-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-SF-64-N32: "-internal-externc-isystem"

 // CHECK-BE-SF-64-N32: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64/sof"
 // CHECK-BE-SF-64-N32: "-L[[TC]]/../../../../sysroot/mips64/sof/usr/lib"
 // CHECK-BE-SF-64-N32: "[[TC]]/mips64/sof{{/|\\\\}}crtend.o"
 // CHECK-BE-SF-64-N32: "[[TC]]/../../../../sysroot/mips64/sof/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips64, ABI n32, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64-linux-gnu -mips64 -mabi=n32 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-NAN-64-N32 %s
 // CHECK-BE-NAN-64-N32: "-internal-isystem"
 // CHECK-BE-NAN-64-N32: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-NAN-64-N32: "-internal-isystem"
 // CHECK-BE-NAN-64-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64/nan2008"
 // CHECK-BE-NAN-64-N32: "-internal-isystem"
 // CHECK-BE-NAN-64-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-NAN-64-N32: "-internal-externc-isystem"

 // CHECK-BE-NAN-64-N32: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64/nan2008"
 // CHECK-BE-NAN-64-N32: "-L[[TC]]/../../../../sysroot/mips64/nan2008/usr/lib"
 // CHECK-BE-NAN-64-N32: "[[TC]]/mips64/nan2008{{/|\\\\}}crtend.o"
 // CHECK-BE-NAN-64-N32: "[[TC]]/../../../../sysroot/mips64/nan2008/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips64, ABI n32, fp64, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64-linux-gnu -mips64 -mabi=n32 -mfp64 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-NAN64-64-N32 %s
 // CHECK-BE-NAN64-64-N32: "-internal-isystem"
 // CHECK-BE-NAN64-64-N32: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-NAN64-64-N32: "-internal-isystem"
 // CHECK-BE-NAN64-64-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64/nan2008"
 // CHECK-BE-NAN64-64-N32: "-internal-isystem"
 // CHECK-BE-NAN64-64-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-NAN64-64-N32: "-internal-externc-isystem"

 // CHECK-BE-NAN64-64-N32: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64/nan2008"
 // CHECK-BE-NAN64-64-N32: "-L[[TC]]/../../../../sysroot/mips64/nan2008/usr/lib"
 // CHECK-BE-NAN64-64-N32: "[[TC]]/mips64/nan2008{{/|\\\\}}crtend.o"
 // CHECK-BE-NAN64-64-N32: "[[TC]]/../../../../sysroot/mips64/nan2008/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips64, ABI 64, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64-linux-gnu -mips64 -mabi=64 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-HF-64-64 %s
 // CHECK-BE-HF-64-64: "-internal-isystem"
 // CHECK-BE-HF-64-64: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-HF-64-64: "-internal-isystem"
 // CHECK-BE-HF-64-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64/64"
 // CHECK-BE-HF-64-64: "-internal-isystem"
 // CHECK-BE-HF-64-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-HF-64-64: "-internal-externc-isystem"

 // CHECK-BE-HF-64-64: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64/64"
 // CHECK-BE-HF-64-64: "-L[[TC]]/../../../../sysroot/mips64/64/usr/lib"
 // CHECK-BE-HF-64-64: "[[TC]]/mips64/64{{/|\\\\}}crtend.o"
 // CHECK-BE-HF-64-64: "[[TC]]/../../../../sysroot/mips64/64/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips64, ABI 64, fp64, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64-linux-gnu -mips64 -mabi=64 -mfp64 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-HF64-64-64 %s
 // CHECK-BE-HF64-64-64: "-internal-isystem"
 // CHECK-BE-HF64-64-64: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-HF64-64-64: "-internal-isystem"
 // CHECK-BE-HF64-64-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64/64"
 // CHECK-BE-HF64-64-64: "-internal-isystem"
 // CHECK-BE-HF64-64-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-HF64-64-64: "-internal-externc-isystem"

 // CHECK-BE-HF64-64-64: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64/64"
 // CHECK-BE-HF64-64-64: "-L[[TC]]/../../../../sysroot/mips64/64/usr/lib"
 // CHECK-BE-HF64-64-64: "[[TC]]/mips64/64{{/|\\\\}}crtend.o"
 // CHECK-BE-HF64-64-64: "[[TC]]/../../../../sysroot/mips64/64/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips64, ABI 64, soft float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64-linux-gnu -mips64 -mabi=64 -msoft-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-SF-64-64 %s
 // CHECK-BE-SF-64-64: "-internal-isystem"
 // CHECK-BE-SF-64-64: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-SF-64-64: "-internal-isystem"
 // CHECK-BE-SF-64-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64/64/sof"
 // CHECK-BE-SF-64-64: "-internal-isystem"
 // CHECK-BE-SF-64-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-SF-64-64: "-internal-externc-isystem"

 // CHECK-BE-SF-64-64: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64/64/sof"
 // CHECK-BE-SF-64-64: "-L[[TC]]/../../../../sysroot/mips64/64/sof/usr/lib"
 // CHECK-BE-SF-64-64: "[[TC]]/mips64/64/sof{{/|\\\\}}crtend.o"
 // CHECK-BE-SF-64-64: "[[TC]]/../../../../sysroot/mips64/64/sof/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips64, ABI 64, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64-linux-gnu -mips64 -mabi=64 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-NAN-64-64 %s
 // CHECK-BE-NAN-64-64: "-internal-isystem"
 // CHECK-BE-NAN-64-64: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-NAN-64-64: "-internal-isystem"
 // CHECK-BE-NAN-64-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64/64/nan2008"
 // CHECK-BE-NAN-64-64: "-internal-isystem"
 // CHECK-BE-NAN-64-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-NAN-64-64: "-internal-externc-isystem"

 // CHECK-BE-NAN-64-64: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64/64/nan2008"
 // CHECK-BE-NAN-64-64: "-L[[TC]]/../../../../sysroot/mips64/64/nan2008/usr/lib"
 // CHECK-BE-NAN-64-64: "[[TC]]/mips64/64/nan2008{{/|\\\\}}crtend.o"
 // CHECK-BE-NAN-64-64: "[[TC]]/../../../../sysroot/mips64/64/nan2008/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips64, ABI 64, fp64, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64-linux-gnu -mips64 -mabi=64 -mfp64 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-NAN64-64-64 %s
 // CHECK-BE-NAN64-64-64: "-internal-isystem"
 // CHECK-BE-NAN64-64-64: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-NAN64-64-64: "-internal-isystem"
 // CHECK-BE-NAN64-64-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64/64/nan2008"
 // CHECK-BE-NAN64-64-64: "-internal-isystem"
 // CHECK-BE-NAN64-64-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-NAN64-64-64: "-internal-externc-isystem"

 // CHECK-BE-NAN64-64-64: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64/64/nan2008"
 // CHECK-BE-NAN64-64-64: "-L[[TC]]/../../../../sysroot/mips64/64/nan2008/usr/lib"
 // CHECK-BE-NAN64-64-64: "[[TC]]/mips64/64/nan2008{{/|\\\\}}crtend.o"
 // CHECK-BE-NAN64-64-64: "[[TC]]/../../../../sysroot/mips64/64/nan2008/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips64r2, ABI n32, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64-linux-gnu -mips64r2 -mabi=n32 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-HF-64R2-N32 %s
 // CHECK-BE-HF-64R2-N32: "-internal-isystem"
 // CHECK-BE-HF-64R2-N32: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-HF-64R2-N32: "-internal-isystem"
 // CHECK-BE-HF-64R2-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64r2"
 // CHECK-BE-HF-64R2-N32: "-internal-isystem"
 // CHECK-BE-HF-64R2-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-HF-64R2-N32: "-internal-externc-isystem"

 // CHECK-BE-HF-64R2-N32: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64r2"
 // CHECK-BE-HF-64R2-N32: "-L[[TC]]/../../../../sysroot/mips64r2/usr/lib"
 // CHECK-BE-HF-64R2-N32: "[[TC]]/mips64r2{{/|\\\\}}crtend.o"
 // CHECK-BE-HF-64R2-N32: "[[TC]]/../../../../sysroot/mips64r2/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips64r2, ABI n32, fp64, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64-linux-gnu -mips64r2 -mabi=n32 -mfp64 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-HF64-64R2-N32 %s
 // CHECK-BE-HF64-64R2-N32: "-internal-isystem"
 // CHECK-BE-HF64-64R2-N32: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-HF64-64R2-N32: "-internal-isystem"
 // CHECK-BE-HF64-64R2-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64r2"
 // CHECK-BE-HF64-64R2-N32: "-internal-isystem"
 // CHECK-BE-HF64-64R2-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-HF64-64R2-N32: "-internal-externc-isystem"

 // CHECK-BE-HF64-64R2-N32: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64r2"
 // CHECK-BE-HF64-64R2-N32: "-L[[TC]]/../../../../sysroot/mips64r2/usr/lib"
 // CHECK-BE-HF64-64R2-N32: "[[TC]]/mips64r2{{/|\\\\}}crtend.o"
 // CHECK-BE-HF64-64R2-N32: "[[TC]]/../../../../sysroot/mips64r2/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips64r2, ABI n32, soft float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64-linux-gnu -mips64r2 -mabi=n32 -msoft-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-SF-64R2-N32 %s
 // CHECK-BE-SF-64R2-N32: "-internal-isystem"
 // CHECK-BE-SF-64R2-N32: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-SF-64R2-N32: "-internal-isystem"
 // CHECK-BE-SF-64R2-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64r2/sof"
 // CHECK-BE-SF-64R2-N32: "-internal-isystem"
 // CHECK-BE-SF-64R2-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-SF-64R2-N32: "-internal-externc-isystem"

 // CHECK-BE-SF-64R2-N32: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64r2/sof"
 // CHECK-BE-SF-64R2-N32: "-L[[TC]]/../../../../sysroot/mips64r2/sof/usr/lib"
 // CHECK-BE-SF-64R2-N32: "[[TC]]/mips64r2/sof{{/|\\\\}}crtend.o"
 // CHECK-BE-SF-64R2-N32: "[[TC]]/../../../../sysroot/mips64r2/sof/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips64r2, ABI n32, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64-linux-gnu -mips64r2 -mabi=n32 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-NAN-64R2-N32 %s
 // CHECK-BE-NAN-64R2-N32: "-internal-isystem"
 // CHECK-BE-NAN-64R2-N32: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-NAN-64R2-N32: "-internal-isystem"
 // CHECK-BE-NAN-64R2-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64r2/nan2008"
 // CHECK-BE-NAN-64R2-N32: "-internal-isystem"
 // CHECK-BE-NAN-64R2-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-NAN-64R2-N32: "-internal-externc-isystem"

 // CHECK-BE-NAN-64R2-N32: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64r2/nan2008"
 // CHECK-BE-NAN-64R2-N32: "-L[[TC]]/../../../../sysroot/mips64r2/nan2008/usr/lib"
 // CHECK-BE-NAN-64R2-N32: "[[TC]]/mips64r2/nan2008{{/|\\\\}}crtend.o"
 // CHECK-BE-NAN-64R2-N32: "[[TC]]/../../../../sysroot/mips64r2/nan2008/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips64r2, ABI n32, fp64, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64-linux-gnu -mips64r2 -mabi=n32 -mfp64 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-NAN64-64R2-N32 %s
 // CHECK-BE-NAN64-64R2-N32: "-internal-isystem"
 // CHECK-BE-NAN64-64R2-N32: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-NAN64-64R2-N32: "-internal-isystem"
 // CHECK-BE-NAN64-64R2-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64r2/nan2008"
 // CHECK-BE-NAN64-64R2-N32: "-internal-isystem"
 // CHECK-BE-NAN64-64R2-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-NAN64-64R2-N32: "-internal-externc-isystem"

 // CHECK-BE-NAN64-64R2-N32: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64r2/nan2008"
 // CHECK-BE-NAN64-64R2-N32: "-L[[TC]]/../../../../sysroot/mips64r2/nan2008/usr/lib"
 // CHECK-BE-NAN64-64R2-N32: "[[TC]]/mips64r2/nan2008{{/|\\\\}}crtend.o"
 // CHECK-BE-NAN64-64R2-N32: "[[TC]]/../../../../sysroot/mips64r2/nan2008/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips64r2, ABI 64, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64-linux-gnu -mips64r2 -mabi=64 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-HF-64R2-64 %s
 // CHECK-BE-HF-64R2-64: "-internal-isystem"
 // CHECK-BE-HF-64R2-64: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-HF-64R2-64: "-internal-isystem"
 // CHECK-BE-HF-64R2-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64r2/64"
 // CHECK-BE-HF-64R2-64: "-internal-isystem"
 // CHECK-BE-HF-64R2-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-HF-64R2-64: "-internal-externc-isystem"

 // CHECK-BE-HF-64R2-64: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64r2/64"
 // CHECK-BE-HF-64R2-64: "-L[[TC]]/../../../../sysroot/mips64r2/64/usr/lib"
 // CHECK-BE-HF-64R2-64: "[[TC]]/mips64r2/64{{/|\\\\}}crtend.o"
 // CHECK-BE-HF-64R2-64: "[[TC]]/../../../../sysroot/mips64r2/64/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips64r2, ABI 64, fp64, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64-linux-gnu -mips64r2 -mabi=64 -mfp64 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-HF64-64R2-64 %s
 // CHECK-BE-HF64-64R2-64: "-internal-isystem"
 // CHECK-BE-HF64-64R2-64: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-HF64-64R2-64: "-internal-isystem"
 // CHECK-BE-HF64-64R2-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64r2/64"
 // CHECK-BE-HF64-64R2-64: "-internal-isystem"
 // CHECK-BE-HF64-64R2-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-HF64-64R2-64: "-internal-externc-isystem"

 // CHECK-BE-HF64-64R2-64: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64r2/64"
 // CHECK-BE-HF64-64R2-64: "-L[[TC]]/../../../../sysroot/mips64r2/64/usr/lib"
 // CHECK-BE-HF64-64R2-64: "[[TC]]/mips64r2/64{{/|\\\\}}crtend.o"
 // CHECK-BE-HF64-64R2-64: "[[TC]]/../../../../sysroot/mips64r2/64/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips64r2, ABI 64, soft float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64-linux-gnu -mips64r2 -mabi=64 -msoft-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-SF-64R2-64 %s
 // CHECK-BE-SF-64R2-64: "-internal-isystem"
 // CHECK-BE-SF-64R2-64: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-SF-64R2-64: "-internal-isystem"
 // CHECK-BE-SF-64R2-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64r2/64/sof"
 // CHECK-BE-SF-64R2-64: "-internal-isystem"
 // CHECK-BE-SF-64R2-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-SF-64R2-64: "-internal-externc-isystem"

 // CHECK-BE-SF-64R2-64: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64r2/64/sof"
 // CHECK-BE-SF-64R2-64: "-L[[TC]]/../../../../sysroot/mips64r2/64/sof/usr/lib"
 // CHECK-BE-SF-64R2-64: "[[TC]]/mips64r2/64/sof{{/|\\\\}}crtend.o"
 // CHECK-BE-SF-64R2-64: "[[TC]]/../../../../sysroot/mips64r2/64/sof/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips64r2, ABI 64, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64-linux-gnu -mips64r2 -mabi=64 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-NAN-64R2-64 %s
 // CHECK-BE-NAN-64R2-64: "-internal-isystem"
 // CHECK-BE-NAN-64R2-64: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-NAN-64R2-64: "-internal-isystem"
 // CHECK-BE-NAN-64R2-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64r2/64/nan2008"
 // CHECK-BE-NAN-64R2-64: "-internal-isystem"
 // CHECK-BE-NAN-64R2-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-NAN-64R2-64: "-internal-externc-isystem"

 // CHECK-BE-NAN-64R2-64: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64r2/64/nan2008"
 // CHECK-BE-NAN-64R2-64: "-L[[TC]]/../../../../sysroot/mips64r2/64/nan2008/usr/lib"
 // CHECK-BE-NAN-64R2-64: "[[TC]]/mips64r2/64/nan2008{{/|\\\\}}crtend.o"
 // CHECK-BE-NAN-64R2-64: "[[TC]]/../../../../sysroot/mips64r2/64/nan2008/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips64r2, ABI 64, fp64, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64-linux-gnu -mips64r2 -mabi=64 -mfp64 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-NAN64-64R2-64 %s
 // CHECK-BE-NAN64-64R2-64: "-internal-isystem"
 // CHECK-BE-NAN64-64R2-64: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-NAN64-64R2-64: "-internal-isystem"
 // CHECK-BE-NAN64-64R2-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64r2/64/nan2008"
 // CHECK-BE-NAN64-64R2-64: "-internal-isystem"
 // CHECK-BE-NAN64-64R2-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-NAN64-64R2-64: "-internal-externc-isystem"

 // CHECK-BE-NAN64-64R2-64: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64r2/64/nan2008"
 // CHECK-BE-NAN64-64R2-64: "-L[[TC]]/../../../../sysroot/mips64r2/64/nan2008/usr/lib"
 // CHECK-BE-NAN64-64R2-64: "[[TC]]/mips64r2/64/nan2008{{/|\\\\}}crtend.o"
 // CHECK-BE-NAN64-64R2-64: "[[TC]]/../../../../sysroot/mips64r2/64/nan2008/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, default (mips64r2), ABI 64, fp64, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64-linux-gnu -mabi=64 -mfp64 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-NAN64-64R2-64-DEF %s
 // CHECK-BE-NAN64-64R2-64-DEF: "-internal-isystem"
 // CHECK-BE-NAN64-64R2-64-DEF: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-NAN64-64R2-64-DEF: "-internal-isystem"
 // CHECK-BE-NAN64-64R2-64-DEF: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64r2/64/nan2008"
 // CHECK-BE-NAN64-64R2-64-DEF: "-internal-isystem"
 // CHECK-BE-NAN64-64R2-64-DEF: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-NAN64-64R2-64-DEF: "-internal-externc-isystem"

 // CHECK-BE-NAN64-64R2-64-DEF: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64r2/64/nan2008"
 // CHECK-BE-NAN64-64R2-64-DEF: "-L[[TC]]/../../../../sysroot/mips64r2/64/nan2008/usr/lib"
 // CHECK-BE-NAN64-64R2-64-DEF: "[[TC]]/mips64r2/64/nan2008{{/|\\\\}}crtend.o"
 // CHECK-BE-NAN64-64R2-64-DEF: "[[TC]]/../../../../sysroot/mips64r2/64/nan2008/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips32, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mips32 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-HF-32 %s
 // CHECK-EL-HF-32: "-internal-isystem"
 // CHECK-EL-HF-32: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-HF-32: "-internal-isystem"
 // CHECK-EL-HF-32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips32/el"
 // CHECK-EL-HF-32: "-internal-isystem"
 // CHECK-EL-HF-32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-HF-32: "-internal-externc-isystem"

 // CHECK-EL-HF-32: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/mips32/el"
 // CHECK-EL-HF-32: "-L[[TC]]/../../../../sysroot/mips32/el/usr/lib/../lib"
 // CHECK-EL-HF-32: "[[TC]]/mips32/el{{/|\\\\}}crtend.o"
 // CHECK-EL-HF-32: "[[TC]]/../../../../sysroot/mips32/el/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips32, fp64, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mips32 -mfp64 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-HF64-32 %s
 // CHECK-EL-HF64-32: "-internal-isystem"
 // CHECK-EL-HF64-32: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-HF64-32: "-internal-isystem"
 // CHECK-EL-HF64-32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips32/el"
 // CHECK-EL-HF64-32: "-internal-isystem"
 // CHECK-EL-HF64-32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-HF64-32: "-internal-externc-isystem"

 // CHECK-EL-HF64-32: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/mips32/el"
 // CHECK-EL-HF64-32: "-L[[TC]]/../../../../sysroot/mips32/el/usr/lib/../lib"
 // CHECK-EL-HF64-32: "[[TC]]/mips32/el{{/|\\\\}}crtend.o"
 // CHECK-EL-HF64-32: "[[TC]]/../../../../sysroot/mips32/el/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips32, soft float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mips32 -msoft-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-SF-32 %s
 // CHECK-EL-SF-32: "-internal-isystem"
 // CHECK-EL-SF-32: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-SF-32: "-internal-isystem"
 // CHECK-EL-SF-32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips32/el/sof"
 // CHECK-EL-SF-32: "-internal-isystem"
 // CHECK-EL-SF-32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-SF-32: "-internal-externc-isystem"

 // CHECK-EL-SF-32: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/mips32/el/sof"
 // CHECK-EL-SF-32: "-L[[TC]]/../../../../sysroot/mips32/el/sof/usr/lib/../lib"
 // CHECK-EL-SF-32: "[[TC]]/mips32/el/sof{{/|\\\\}}crtend.o"
 // CHECK-EL-SF-32: "[[TC]]/../../../../sysroot/mips32/el/sof/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips32 / mips16, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mips32 -mips16 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-HF-16 %s
 // CHECK-EL-HF-16: "-internal-isystem"
 // CHECK-EL-HF-16: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-HF-16: "-internal-isystem"
 // CHECK-EL-HF-16: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips32/mips16/el"
 // CHECK-EL-HF-16: "-internal-isystem"
 // CHECK-EL-HF-16: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-HF-16: "-internal-externc-isystem"

 // CHECK-EL-HF-16: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/mips32/mips16/el"
 // CHECK-EL-HF-16: "-L[[TC]]/../../../../sysroot/mips32/mips16/el/usr/lib/../lib"
 // CHECK-EL-HF-16: "[[TC]]/mips32/mips16/el{{/|\\\\}}crtend.o"
 // CHECK-EL-HF-16: "[[TC]]/../../../../sysroot/mips32/mips16/el/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips32 / mips16, fp64, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mips32 -mips16 -mfp64 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-HF64-16 %s
 // CHECK-EL-HF64-16: "-internal-isystem"
 // CHECK-EL-HF64-16: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-HF64-16: "-internal-isystem"
 // CHECK-EL-HF64-16: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips32/mips16/el"
 // CHECK-EL-HF64-16: "-internal-isystem"
 // CHECK-EL-HF64-16: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-HF64-16: "-internal-externc-isystem"

 // CHECK-EL-HF64-16: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/mips32/mips16/el"
 // CHECK-EL-HF64-16: "-L[[TC]]/../../../../sysroot/mips32/mips16/el/usr/lib/../lib"
 // CHECK-EL-HF64-16: "[[TC]]/mips32/mips16/el{{/|\\\\}}crtend.o"
 // CHECK-EL-HF64-16: "[[TC]]/../../../../sysroot/mips32/mips16/el/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips32 / mips16, soft float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mips32 -mips16 -msoft-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-SF-16 %s
 // CHECK-EL-SF-16: "-internal-isystem"
 // CHECK-EL-SF-16: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-SF-16: "-internal-isystem"
 // CHECK-EL-SF-16: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips32/mips16/el/sof"
 // CHECK-EL-SF-16: "-internal-isystem"
 // CHECK-EL-SF-16: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-SF-16: "-internal-externc-isystem"

 // CHECK-EL-SF-16: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/mips32/mips16/el/sof"
 // CHECK-EL-SF-16: "-L[[TC]]/../../../../sysroot/mips32/mips16/el/sof/usr/lib/../lib"
 // CHECK-EL-SF-16: "[[TC]]/mips32/mips16/el/sof{{/|\\\\}}crtend.o"
 // CHECK-EL-SF-16: "[[TC]]/../../../../sysroot/mips32/mips16/el/sof/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips32 / mips16, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mips32 -mips16 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-NAN-16 %s
 // CHECK-EL-NAN-16: "-internal-isystem"
 // CHECK-EL-NAN-16: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-NAN-16: "-internal-isystem"
 // CHECK-EL-NAN-16: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips32/mips16/el/nan2008"
 // CHECK-EL-NAN-16: "-internal-isystem"
 // CHECK-EL-NAN-16: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-NAN-16: "-internal-externc-isystem"

 // CHECK-EL-NAN-16: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/mips32/mips16/el/nan2008"
 // CHECK-EL-NAN-16: "-L[[TC]]/../../../../sysroot/mips32/mips16/el/nan2008/usr/lib/../lib"
 // CHECK-EL-NAN-16: "[[TC]]/mips32/mips16/el/nan2008{{/|\\\\}}crtend.o"
 // CHECK-EL-NAN-16: "[[TC]]/../../../../sysroot/mips32/mips16/el/nan2008/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips32 / mips16, fp64, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mips32 -mips16 -mfp64 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-NAN64-16 %s
 // CHECK-EL-NAN64-16: "-internal-isystem"
 // CHECK-EL-NAN64-16: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-NAN64-16: "-internal-isystem"
 // CHECK-EL-NAN64-16: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips32/mips16/el/nan2008"
 // CHECK-EL-NAN64-16: "-internal-isystem"
 // CHECK-EL-NAN64-16: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-NAN64-16: "-internal-externc-isystem"

 // CHECK-EL-NAN64-16: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/mips32/mips16/el/nan2008"
 // CHECK-EL-NAN64-16: "-L[[TC]]/../../../../sysroot/mips32/mips16/el/nan2008/usr/lib/../lib"
 // CHECK-EL-NAN64-16: "[[TC]]/mips32/mips16/el/nan2008{{/|\\\\}}crtend.o"
 // CHECK-EL-NAN64-16: "[[TC]]/../../../../sysroot/mips32/mips16/el/nan2008/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips32, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mips32 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-NAN-32 %s
 // CHECK-EL-NAN-32: "-internal-isystem"
 // CHECK-EL-NAN-32: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-NAN-32: "-internal-isystem"
 // CHECK-EL-NAN-32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips32/el/nan2008"
 // CHECK-EL-NAN-32: "-internal-isystem"
 // CHECK-EL-NAN-32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-NAN-32: "-internal-externc-isystem"

 // CHECK-EL-NAN-32: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/mips32/el/nan2008"
 // CHECK-EL-NAN-32: "-L[[TC]]/../../../../sysroot/mips32/el/nan2008/usr/lib/../lib"
 // CHECK-EL-NAN-32: "[[TC]]/mips32/el/nan2008{{/|\\\\}}crtend.o"
 // CHECK-EL-NAN-32: "[[TC]]/../../../../sysroot/mips32/el/nan2008/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips32, fp64, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mips32 -mfp64 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-NAN64-32 %s
 // CHECK-EL-NAN64-32: "-internal-isystem"
 // CHECK-EL-NAN64-32: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-NAN64-32: "-internal-isystem"
 // CHECK-EL-NAN64-32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips32/el/nan2008"
 // CHECK-EL-NAN64-32: "-internal-isystem"
 // CHECK-EL-NAN64-32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-NAN64-32: "-internal-externc-isystem"

 // CHECK-EL-NAN64-32: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/mips32/el/nan2008"
 // CHECK-EL-NAN64-32: "-L[[TC]]/../../../../sysroot/mips32/el/nan2008/usr/lib/../lib"
 // CHECK-EL-NAN64-32: "[[TC]]/mips32/el/nan2008{{/|\\\\}}crtend.o"
 // CHECK-EL-NAN64-32: "[[TC]]/../../../../sysroot/mips32/el/nan2008/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips32r2, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mips32r2 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-HF-32R2 %s
 // CHECK-EL-HF-32R2: "-internal-isystem"
 // CHECK-EL-HF-32R2: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-HF-32R2: "-internal-isystem"
 // CHECK-EL-HF-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/el"
 // CHECK-EL-HF-32R2: "-internal-isystem"
 // CHECK-EL-HF-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-HF-32R2: "-internal-externc-isystem"

 // CHECK-EL-HF-32R2: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/el"
 // CHECK-EL-HF-32R2: "-L[[TC]]/../../../../sysroot/el/usr/lib/../lib"
 // CHECK-EL-HF-32R2: "[[TC]]/el{{/|\\\\}}crtend.o"
 // CHECK-EL-HF-32R2: "[[TC]]/../../../../sysroot/el/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips32r2, hard float, uclibc
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mips32r2 -mhard-float -muclibc \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-UC-HF-32R2 %s
 // CHECK-EL-UC-HF-32R2: "-internal-isystem"
 // CHECK-EL-UC-HF-32R2: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-UC-HF-32R2: "-internal-isystem"
 // CHECK-EL-UC-HF-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/uclibc/el"
 // CHECK-EL-UC-HF-32R2: "-internal-isystem"
 // CHECK-EL-UC-HF-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-UC-HF-32R2: "-internal-externc-isystem"

 // CHECK-EL-UC-HF-32R2: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/uclibc/el"
 // CHECK-EL-UC-HF-32R2: "-L[[TC]]/../../../../sysroot/uclibc/el/usr/lib/../lib"
 // CHECK-EL-UC-HF-32R2: "[[TC]]/uclibc/el{{/|\\\\}}crtend.o"
 // CHECK-EL-UC-HF-32R2: "[[TC]]/../../../../sysroot/uclibc/el/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips32r2, fp64, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mips32r2 -mfp64 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-HF64-32R2 %s
 // CHECK-EL-HF64-32R2: "-internal-isystem"
 // CHECK-EL-HF64-32R2: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-HF64-32R2: "-internal-isystem"
 // CHECK-EL-HF64-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/el"
 // CHECK-EL-HF64-32R2: "-internal-isystem"
 // CHECK-EL-HF64-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-HF64-32R2: "-internal-externc-isystem"

 // CHECK-EL-HF64-32R2: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/el"
 // CHECK-EL-HF64-32R2: "-L[[TC]]/../../../../sysroot/el/usr/lib/../lib"
 // CHECK-EL-HF64-32R2: "[[TC]]/el{{/|\\\\}}crtend.o"
 // CHECK-EL-HF64-32R2: "[[TC]]/../../../../sysroot/el/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips32r2, soft float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mips32r2 -msoft-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-SF-32R2 %s
 // CHECK-EL-SF-32R2: "-internal-isystem"
 // CHECK-EL-SF-32R2: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-SF-32R2: "-internal-isystem"
 // CHECK-EL-SF-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/el/sof"
 // CHECK-EL-SF-32R2: "-internal-isystem"
 // CHECK-EL-SF-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-SF-32R2: "-internal-externc-isystem"

 // CHECK-EL-SF-32R2: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/el/sof"
 // CHECK-EL-SF-32R2: "-L[[TC]]/../../../../sysroot/el/sof/usr/lib/../lib"
 // CHECK-EL-SF-32R2: "[[TC]]/el/sof{{/|\\\\}}crtend.o"
 // CHECK-EL-SF-32R2: "[[TC]]/../../../../sysroot/el/sof/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips32r2, soft float, uclibc
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mips32r2 -msoft-float -muclibc \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-UC-SF-32R2 %s
 // CHECK-EL-UC-SF-32R2: "-internal-isystem"
 // CHECK-EL-UC-SF-32R2: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-UC-SF-32R2: "-internal-isystem"
 // CHECK-EL-UC-SF-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/uclibc/el/sof"
 // CHECK-EL-UC-SF-32R2: "-internal-isystem"
 // CHECK-EL-UC-SF-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-UC-SF-32R2: "-internal-externc-isystem"

 // CHECK-EL-UC-SF-32R2: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/uclibc/el/sof"
 // CHECK-EL-UC-SF-32R2: "-L[[TC]]/../../../../sysroot/uclibc/el/sof/usr/lib/../lib"
 // CHECK-EL-UC-SF-32R2: "[[TC]]/uclibc/el/sof{{/|\\\\}}crtend.o"
 // CHECK-EL-UC-SF-32R2: "[[TC]]/../../../../sysroot/uclibc/el/sof/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips32r2 / mips16, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mips32r2 -mips16 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-HF-16R2 %s
 // CHECK-EL-HF-16R2: "-internal-isystem"
 // CHECK-EL-HF-16R2: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-HF-16R2: "-internal-isystem"
 // CHECK-EL-HF-16R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips16/el"
 // CHECK-EL-HF-16R2: "-internal-isystem"
 // CHECK-EL-HF-16R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-HF-16R2: "-internal-externc-isystem"

 // CHECK-EL-HF-16R2: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/mips16/el"
 // CHECK-EL-HF-16R2: "-L[[TC]]/../../../../sysroot/mips16/el/usr/lib/../lib"
 // CHECK-EL-HF-16R2: "[[TC]]/mips16/el{{/|\\\\}}crtend.o"
 // CHECK-EL-HF-16R2: "[[TC]]/../../../../sysroot/mips16/el/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips32r2 / mips16, fp64, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mips32r2 -mips16 -mfp64 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-HF64-16R2 %s
 // CHECK-EL-HF64-16R2: "-internal-isystem"
 // CHECK-EL-HF64-16R2: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-HF64-16R2: "-internal-isystem"
 // CHECK-EL-HF64-16R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips16/el"
 // CHECK-EL-HF64-16R2: "-internal-isystem"
 // CHECK-EL-HF64-16R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-HF64-16R2: "-internal-externc-isystem"

 // CHECK-EL-HF64-16R2: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/mips16/el"
 // CHECK-EL-HF64-16R2: "-L[[TC]]/../../../../sysroot/mips16/el/usr/lib/../lib"
 // CHECK-EL-HF64-16R2: "[[TC]]/mips16/el{{/|\\\\}}crtend.o"
 // CHECK-EL-HF64-16R2: "[[TC]]/../../../../sysroot/mips16/el/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips32r2 / mips16, soft float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mips32r2 -mips16 -msoft-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-SF-16R2 %s
 // CHECK-EL-SF-16R2: "-internal-isystem"
 // CHECK-EL-SF-16R2: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-SF-16R2: "-internal-isystem"
 // CHECK-EL-SF-16R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips16/el/sof"
 // CHECK-EL-SF-16R2: "-internal-isystem"
 // CHECK-EL-SF-16R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-SF-16R2: "-internal-externc-isystem"

 // CHECK-EL-SF-16R2: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/mips16/el/sof"
 // CHECK-EL-SF-16R2: "-L[[TC]]/../../../../sysroot/mips16/el/sof/usr/lib/../lib"
 // CHECK-EL-SF-16R2: "[[TC]]/mips16/el/sof{{/|\\\\}}crtend.o"
 // CHECK-EL-SF-16R2: "[[TC]]/../../../../sysroot/mips16/el/sof/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips32r2 / mips16, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mips32r2 -mips16 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-NAN-16R2 %s
 // CHECK-EL-NAN-16R2: "-internal-isystem"
 // CHECK-EL-NAN-16R2: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-NAN-16R2: "-internal-isystem"
 // CHECK-EL-NAN-16R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips16/el/nan2008"
 // CHECK-EL-NAN-16R2: "-internal-isystem"
 // CHECK-EL-NAN-16R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-NAN-16R2: "-internal-externc-isystem"

 // CHECK-EL-NAN-16R2: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/mips16/el/nan2008"
 // CHECK-EL-NAN-16R2: "-L[[TC]]/../../../../sysroot/mips16/el/nan2008/usr/lib/../lib"
 // CHECK-EL-NAN-16R2: "[[TC]]/mips16/el/nan2008{{/|\\\\}}crtend.o"
 // CHECK-EL-NAN-16R2: "[[TC]]/../../../../sysroot/mips16/el/nan2008/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips32r2 / mips16, fp64, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mips32r2 -mips16 -mfp64 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-NAN64-16R2 %s
 // CHECK-EL-NAN64-16R2: "-internal-isystem"
 // CHECK-EL-NAN64-16R2: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-NAN64-16R2: "-internal-isystem"
 // CHECK-EL-NAN64-16R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips16/el/nan2008"
 // CHECK-EL-NAN64-16R2: "-internal-isystem"
 // CHECK-EL-NAN64-16R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-NAN64-16R2: "-internal-externc-isystem"

 // CHECK-EL-NAN64-16R2: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/mips16/el/nan2008"
 // CHECK-EL-NAN64-16R2: "-L[[TC]]/../../../../sysroot/mips16/el/nan2008/usr/lib/../lib"
 // CHECK-EL-NAN64-16R2: "[[TC]]/mips16/el/nan2008{{/|\\\\}}crtend.o"
 // CHECK-EL-NAN64-16R2: "[[TC]]/../../../../sysroot/mips16/el/nan2008/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips32r2, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mips32r2 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-NAN-32R2 %s
 // CHECK-EL-NAN-32R2: "-internal-isystem"
 // CHECK-EL-NAN-32R2: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-NAN-32R2: "-internal-isystem"
 // CHECK-EL-NAN-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/el/nan2008"
 // CHECK-EL-NAN-32R2: "-internal-isystem"
 // CHECK-EL-NAN-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-NAN-32R2: "-internal-externc-isystem"

 // CHECK-EL-NAN-32R2: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/el/nan2008"
 // CHECK-EL-NAN-32R2: "-L[[TC]]/../../../../sysroot/el/nan2008/usr/lib/../lib"
 // CHECK-EL-NAN-32R2: "[[TC]]/el/nan2008{{/|\\\\}}crtend.o"
 // CHECK-EL-NAN-32R2: "[[TC]]/../../../../sysroot/el/nan2008/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips32r2, nan2008, uclibc
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mips32r2 -mnan=2008 -muclibc \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-UC-NAN-32R2 %s
 // CHECK-EL-UC-NAN-32R2: "-internal-isystem"
 // CHECK-EL-UC-NAN-32R2: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-UC-NAN-32R2: "-internal-isystem"
 // CHECK-EL-UC-NAN-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/uclibc/el/nan2008"
 // CHECK-EL-UC-NAN-32R2: "-internal-isystem"
 // CHECK-EL-UC-NAN-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-UC-NAN-32R2: "-internal-externc-isystem"

 // CHECK-EL-UC-NAN-32R2: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/uclibc/el/nan2008"
 // CHECK-EL-UC-NAN-32R2: "-L[[TC]]/../../../../sysroot/uclibc/el/nan2008/usr/lib/../lib"
 // CHECK-EL-UC-NAN-32R2: "[[TC]]/uclibc/el/nan2008{{/|\\\\}}crtend.o"
 // CHECK-EL-UC-NAN-32R2: "[[TC]]/../../../../sysroot/uclibc/el/nan2008/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips32r2, fp64, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mips32r2 -mfp64 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-NAN64-32R2 %s
 // CHECK-EL-NAN64-32R2: "-internal-isystem"
 // CHECK-EL-NAN64-32R2: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-NAN64-32R2: "-internal-isystem"
 // CHECK-EL-NAN64-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/el/nan2008"
 // CHECK-EL-NAN64-32R2: "-internal-isystem"
 // CHECK-EL-NAN64-32R2: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-NAN64-32R2: "-internal-externc-isystem"

 // CHECK-EL-NAN64-32R2: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/el/nan2008"
 // CHECK-EL-NAN64-32R2: "-L[[TC]]/../../../../sysroot/el/nan2008/usr/lib/../lib"
 // CHECK-EL-NAN64-32R2: "[[TC]]/el/nan2008{{/|\\\\}}crtend.o"
 // CHECK-EL-NAN64-32R2: "[[TC]]/../../../../sysroot/el/nan2008/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, default (mips32r2), fp64, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mfp64 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-NAN64-32R2-DEF %s
 // CHECK-EL-NAN64-32R2-DEF: "-internal-isystem"
 // CHECK-EL-NAN64-32R2-DEF: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-NAN64-32R2-DEF: "-internal-isystem"
 // CHECK-EL-NAN64-32R2-DEF: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/el/nan2008"
 // CHECK-EL-NAN64-32R2-DEF: "-internal-isystem"
 // CHECK-EL-NAN64-32R2-DEF: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-NAN64-32R2-DEF: "-internal-externc-isystem"

 // CHECK-EL-NAN64-32R2-DEF: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/el/nan2008"
 // CHECK-EL-NAN64-32R2-DEF: "-L[[TC]]/../../../../sysroot/el/nan2008/usr/lib/../lib"
 // CHECK-EL-NAN64-32R2-DEF: "[[TC]]/el/nan2008{{/|\\\\}}crtend.o"
 // CHECK-EL-NAN64-32R2-DEF: "[[TC]]/../../../../sysroot/el/nan2008/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, micromips, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mmicromips -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-HF-MM %s
 // CHECK-EL-HF-MM: "-internal-isystem"
 // CHECK-EL-HF-MM: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-HF-MM: "-internal-isystem"
 // CHECK-EL-HF-MM: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/micromips/el"
 // CHECK-EL-HF-MM: "-internal-isystem"
 // CHECK-EL-HF-MM: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-HF-MM: "-internal-externc-isystem"

 // CHECK-EL-HF-MM: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/micromips/el"
 // CHECK-EL-HF-MM: "-L[[TC]]/../../../../sysroot/micromips/el/usr/lib/../lib"
 // CHECK-EL-HF-MM: "[[TC]]/micromips/el{{/|\\\\}}crtend.o"
 // CHECK-EL-HF-MM: "[[TC]]/../../../../sysroot/micromips/el/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, micromips, fp64, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mmicromips -mfp64 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-HF64-MM %s
 // CHECK-EL-HF64-MM: "-internal-isystem"
 // CHECK-EL-HF64-MM: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-HF64-MM: "-internal-isystem"
 // CHECK-EL-HF64-MM: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/micromips/el"
 // CHECK-EL-HF64-MM: "-internal-isystem"
 // CHECK-EL-HF64-MM: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-HF64-MM: "-internal-externc-isystem"

 // CHECK-EL-HF64-MM: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/micromips/el"
 // CHECK-EL-HF64-MM: "-L[[TC]]/../../../../sysroot/micromips/el/usr/lib/../lib"
 // CHECK-EL-HF64-MM: "[[TC]]/micromips/el{{/|\\\\}}crtend.o"
 // CHECK-EL-HF64-MM: "[[TC]]/../../../../sysroot/micromips/el/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, micromips, soft float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mmicromips -msoft-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-SF-MM %s
 // CHECK-EL-SF-MM: "-internal-isystem"
 // CHECK-EL-SF-MM: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-SF-MM: "-internal-isystem"
 // CHECK-EL-SF-MM: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/micromips/el/sof"
 // CHECK-EL-SF-MM: "-internal-isystem"
 // CHECK-EL-SF-MM: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-SF-MM: "-internal-externc-isystem"

 // CHECK-EL-SF-MM: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/micromips/el/sof"
 // CHECK-EL-SF-MM: "-L[[TC]]/../../../../sysroot/micromips/el/sof/usr/lib/../lib"
 // CHECK-EL-SF-MM: "[[TC]]/micromips/el/sof{{/|\\\\}}crtend.o"
 // CHECK-EL-SF-MM: "[[TC]]/../../../../sysroot/micromips/el/sof/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, micromips, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mmicromips -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-NAN-MM %s
 // CHECK-EL-NAN-MM: "-internal-isystem"
 // CHECK-EL-NAN-MM: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-NAN-MM: "-internal-isystem"
 // CHECK-EL-NAN-MM: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/micromips/el/nan2008"
 // CHECK-EL-NAN-MM: "-internal-isystem"
 // CHECK-EL-NAN-MM: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-NAN-MM: "-internal-externc-isystem"

 // CHECK-EL-NAN-MM: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/micromips/el/nan2008"
 // CHECK-EL-NAN-MM: "-L[[TC]]/../../../../sysroot/micromips/el/nan2008/usr/lib/../lib"
 // CHECK-EL-NAN-MM: "[[TC]]/micromips/el/nan2008{{/|\\\\}}crtend.o"
 // CHECK-EL-NAN-MM: "[[TC]]/../../../../sysroot/micromips/el/nan2008/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, micromips, fp64, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mipsel-linux-gnu -mmicromips -mfp64 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-NAN64-MM %s
 // CHECK-EL-NAN64-MM: "-internal-isystem"
 // CHECK-EL-NAN64-MM: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-NAN64-MM: "-internal-isystem"
 // CHECK-EL-NAN64-MM: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/micromips/el/nan2008"
 // CHECK-EL-NAN64-MM: "-internal-isystem"
 // CHECK-EL-NAN64-MM: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-NAN64-MM: "-internal-externc-isystem"

 // CHECK-EL-NAN64-MM: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib/micromips/el/nan2008"
 // CHECK-EL-NAN64-MM: "-L[[TC]]/../../../../sysroot/micromips/el/nan2008/usr/lib/../lib"
 // CHECK-EL-NAN64-MM: "[[TC]]/micromips/el/nan2008{{/|\\\\}}crtend.o"
 // CHECK-EL-NAN64-MM: "[[TC]]/../../../../sysroot/micromips/el/nan2008/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips64, ABI n32, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64el-linux-gnu -mips64 -mabi=n32 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-HF-64-N32 %s
 // CHECK-EL-HF-64-N32: "-internal-isystem"
 // CHECK-EL-HF-64-N32: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-HF-64-N32: "-internal-isystem"
 // CHECK-EL-HF-64-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64/el"
 // CHECK-EL-HF-64-N32: "-internal-isystem"
 // CHECK-EL-HF-64-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-HF-64-N32: "-internal-externc-isystem"

 // CHECK-EL-HF-64-N32: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64/el"
 // CHECK-EL-HF-64-N32: "-L[[TC]]/../../../../sysroot/mips64/el/usr/lib"
 // CHECK-EL-HF-64-N32: "[[TC]]/mips64/el{{/|\\\\}}crtend.o"
 // CHECK-EL-HF-64-N32: "[[TC]]/../../../../sysroot/mips64/el/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips64, ABI n32, fp64, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64el-linux-gnu -mips64 -mabi=n32 -mfp64 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-HF64-64-N32 %s
 // CHECK-EL-HF64-64-N32: "-internal-isystem"
 // CHECK-EL-HF64-64-N32: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-HF64-64-N32: "-internal-isystem"
 // CHECK-EL-HF64-64-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64/el"
 // CHECK-EL-HF64-64-N32: "-internal-isystem"
 // CHECK-EL-HF64-64-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-HF64-64-N32: "-internal-externc-isystem"

 // CHECK-EL-HF64-64-N32: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64/el"
 // CHECK-EL-HF64-64-N32: "-L[[TC]]/../../../../sysroot/mips64/el/usr/lib"
 // CHECK-EL-HF64-64-N32: "[[TC]]/mips64/el{{/|\\\\}}crtend.o"
 // CHECK-EL-HF64-64-N32: "[[TC]]/../../../../sysroot/mips64/el/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips64, ABI n32, soft float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64el-linux-gnu -mips64 -mabi=n32 -msoft-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-SF-64-N32 %s
 // CHECK-EL-SF-64-N32: "-internal-isystem"
 // CHECK-EL-SF-64-N32: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-SF-64-N32: "-internal-isystem"
 // CHECK-EL-SF-64-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64/el/sof"
 // CHECK-EL-SF-64-N32: "-internal-isystem"
 // CHECK-EL-SF-64-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-SF-64-N32: "-internal-externc-isystem"

 // CHECK-EL-SF-64-N32: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64/el/sof"
 // CHECK-EL-SF-64-N32: "-L[[TC]]/../../../../sysroot/mips64/el/sof/usr/lib"
 // CHECK-EL-SF-64-N32: "[[TC]]/mips64/el/sof{{/|\\\\}}crtend.o"
 // CHECK-EL-SF-64-N32: "[[TC]]/../../../../sysroot/mips64/el/sof/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips64, ABI n32, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64el-linux-gnu -mips64 -mabi=n32 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-NAN-64-N32 %s
 // CHECK-EL-NAN-64-N32: "-internal-isystem"
 // CHECK-EL-NAN-64-N32: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-NAN-64-N32: "-internal-isystem"
 // CHECK-EL-NAN-64-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64/el/nan2008"
 // CHECK-EL-NAN-64-N32: "-internal-isystem"
 // CHECK-EL-NAN-64-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-NAN-64-N32: "-internal-externc-isystem"

 // CHECK-EL-NAN-64-N32: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64/el/nan2008"
 // CHECK-EL-NAN-64-N32: "-L[[TC]]/../../../../sysroot/mips64/el/nan2008/usr/lib"
 // CHECK-EL-NAN-64-N32: "[[TC]]/mips64/el/nan2008{{/|\\\\}}crtend.o"
 // CHECK-EL-NAN-64-N32: "[[TC]]/../../../../sysroot/mips64/el/nan2008/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips64, ABI n32, fp64, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64el-linux-gnu -mips64 -mabi=n32 -mfp64 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-NAN64-64-N32 %s
 // CHECK-EL-NAN64-64-N32: "-internal-isystem"
 // CHECK-EL-NAN64-64-N32: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-NAN64-64-N32: "-internal-isystem"
 // CHECK-EL-NAN64-64-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64/el/nan2008"
 // CHECK-EL-NAN64-64-N32: "-internal-isystem"
 // CHECK-EL-NAN64-64-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-NAN64-64-N32: "-internal-externc-isystem"

 // CHECK-EL-NAN64-64-N32: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64/el/nan2008"
 // CHECK-EL-NAN64-64-N32: "-L[[TC]]/../../../../sysroot/mips64/el/nan2008/usr/lib"
 // CHECK-EL-NAN64-64-N32: "[[TC]]/mips64/el/nan2008{{/|\\\\}}crtend.o"
 // CHECK-EL-NAN64-64-N32: "[[TC]]/../../../../sysroot/mips64/el/nan2008/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips64, ABI 64, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64el-linux-gnu -mips64 -mabi=64 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-HF-64-64 %s
 // CHECK-EL-HF-64-64: "-internal-isystem"
 // CHECK-EL-HF-64-64: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-HF-64-64: "-internal-isystem"
 // CHECK-EL-HF-64-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64/64/el"
 // CHECK-EL-HF-64-64: "-internal-isystem"
 // CHECK-EL-HF-64-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-HF-64-64: "-internal-externc-isystem"

 // CHECK-EL-HF-64-64: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64/64/el"
 // CHECK-EL-HF-64-64: "-L[[TC]]/../../../../sysroot/mips64/64/el/usr/lib"
 // CHECK-EL-HF-64-64: "[[TC]]/mips64/64/el{{/|\\\\}}crtend.o"
 // CHECK-EL-HF-64-64: "[[TC]]/../../../../sysroot/mips64/64/el/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips64, ABI 64, fp64, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64el-linux-gnu -mips64 -mabi=64 -mfp64 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-HF64-64-64 %s
 // CHECK-EL-HF64-64-64: "-internal-isystem"
 // CHECK-EL-HF64-64-64: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-HF64-64-64: "-internal-isystem"
 // CHECK-EL-HF64-64-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64/64/el"
 // CHECK-EL-HF64-64-64: "-internal-isystem"
 // CHECK-EL-HF64-64-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-HF64-64-64: "-internal-externc-isystem"

 // CHECK-EL-HF64-64-64: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64/64/el"
 // CHECK-EL-HF64-64-64: "-L[[TC]]/../../../../sysroot/mips64/64/el/usr/lib"
 // CHECK-EL-HF64-64-64: "[[TC]]/mips64/64/el{{/|\\\\}}crtend.o"
 // CHECK-EL-HF64-64-64: "[[TC]]/../../../../sysroot/mips64/64/el/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips64, ABI 64, soft float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64el-linux-gnu -mips64 -mabi=64 -msoft-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-SF-64-64 %s
 // CHECK-EL-SF-64-64: "-internal-isystem"
 // CHECK-EL-SF-64-64: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-SF-64-64: "-internal-isystem"
 // CHECK-EL-SF-64-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64/64/el/sof"
 // CHECK-EL-SF-64-64: "-internal-isystem"
 // CHECK-EL-SF-64-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-SF-64-64: "-internal-externc-isystem"

 // CHECK-EL-SF-64-64: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64/64/el/sof"
 // CHECK-EL-SF-64-64: "-L[[TC]]/../../../../sysroot/mips64/64/el/sof/usr/lib"
 // CHECK-EL-SF-64-64: "[[TC]]/mips64/64/el/sof{{/|\\\\}}crtend.o"
 // CHECK-EL-SF-64-64: "[[TC]]/../../../../sysroot/mips64/64/el/sof/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips64, ABI 64, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64el-linux-gnu -mips64 -mabi=64 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-NAN-64-64 %s
 // CHECK-EL-NAN-64-64: "-internal-isystem"
 // CHECK-EL-NAN-64-64: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-NAN-64-64: "-internal-isystem"
 // CHECK-EL-NAN-64-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64/64/el/nan2008"
 // CHECK-EL-NAN-64-64: "-internal-isystem"
 // CHECK-EL-NAN-64-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-NAN-64-64: "-internal-externc-isystem"

 // CHECK-EL-NAN-64-64: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64/64/el/nan2008"
 // CHECK-EL-NAN-64-64: "-L[[TC]]/../../../../sysroot/mips64/64/el/nan2008/usr/lib"
 // CHECK-EL-NAN-64-64: "[[TC]]/mips64/64/el/nan2008{{/|\\\\}}crtend.o"
 // CHECK-EL-NAN-64-64: "[[TC]]/../../../../sysroot/mips64/64/el/nan2008/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips64, ABI 64, fp64, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64el-linux-gnu -mips64 -mabi=64 -mfp64 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-NAN64-64-64 %s
 // CHECK-EL-NAN64-64-64: "-internal-isystem"
 // CHECK-EL-NAN64-64-64: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-NAN64-64-64: "-internal-isystem"
 // CHECK-EL-NAN64-64-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64/64/el/nan2008"
 // CHECK-EL-NAN64-64-64: "-internal-isystem"
 // CHECK-EL-NAN64-64-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-NAN64-64-64: "-internal-externc-isystem"

 // CHECK-EL-NAN64-64-64: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64/64/el/nan2008"
 // CHECK-EL-NAN64-64-64: "-L[[TC]]/../../../../sysroot/mips64/64/el/nan2008/usr/lib"
 // CHECK-EL-NAN64-64-64: "[[TC]]/mips64/64/el/nan2008{{/|\\\\}}crtend.o"
 // CHECK-EL-NAN64-64-64: "[[TC]]/../../../../sysroot/mips64/64/el/nan2008/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips64r2, ABI n32, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64el-linux-gnu -mips64r2 -mabi=n32 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-HF-64R2-N32 %s
 // CHECK-EL-HF-64R2-N32: "-internal-isystem"
 // CHECK-EL-HF-64R2-N32: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-HF-64R2-N32: "-internal-isystem"
 // CHECK-EL-HF-64R2-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64r2/el"
 // CHECK-EL-HF-64R2-N32: "-internal-isystem"
 // CHECK-EL-HF-64R2-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-HF-64R2-N32: "-internal-externc-isystem"

 // CHECK-EL-HF-64R2-N32: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64r2/el"
 // CHECK-EL-HF-64R2-N32: "-L[[TC]]/../../../../sysroot/mips64r2/el/usr/lib"
 // CHECK-EL-HF-64R2-N32: "[[TC]]/mips64r2/el{{/|\\\\}}crtend.o"
 // CHECK-EL-HF-64R2-N32: "[[TC]]/../../../../sysroot/mips64r2/el/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips64r2, ABI n32, fp64, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64el-linux-gnu -mips64r2 -mabi=n32 -mfp64 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-HF64-64R2-N32 %s
 // CHECK-EL-HF64-64R2-N32: "-internal-isystem"
 // CHECK-EL-HF64-64R2-N32: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-HF64-64R2-N32: "-internal-isystem"
 // CHECK-EL-HF64-64R2-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64r2/el"
 // CHECK-EL-HF64-64R2-N32: "-internal-isystem"
 // CHECK-EL-HF64-64R2-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-HF64-64R2-N32: "-internal-externc-isystem"

 // CHECK-EL-HF64-64R2-N32: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64r2/el"
 // CHECK-EL-HF64-64R2-N32: "-L[[TC]]/../../../../sysroot/mips64r2/el/usr/lib"
 // CHECK-EL-HF64-64R2-N32: "[[TC]]/mips64r2/el{{/|\\\\}}crtend.o"
 // CHECK-EL-HF64-64R2-N32: "[[TC]]/../../../../sysroot/mips64r2/el/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips64r2, ABI n32, soft float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64el-linux-gnu -mips64r2 -mabi=n32 -msoft-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-SF-64R2-N32 %s
 // CHECK-EL-SF-64R2-N32: "-internal-isystem"
 // CHECK-EL-SF-64R2-N32: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-SF-64R2-N32: "-internal-isystem"
 // CHECK-EL-SF-64R2-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64r2/el/sof"
 // CHECK-EL-SF-64R2-N32: "-internal-isystem"
 // CHECK-EL-SF-64R2-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-SF-64R2-N32: "-internal-externc-isystem"

 // CHECK-EL-SF-64R2-N32: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64r2/el/sof"
 // CHECK-EL-SF-64R2-N32: "-L[[TC]]/../../../../sysroot/mips64r2/el/sof/usr/lib"
 // CHECK-EL-SF-64R2-N32: "[[TC]]/mips64r2/el/sof{{/|\\\\}}crtend.o"
 // CHECK-EL-SF-64R2-N32: "[[TC]]/../../../../sysroot/mips64r2/el/sof/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips64r2, ABI n32, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64el-linux-gnu -mips64r2 -mabi=n32 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-NAN-64R2-N32 %s
 // CHECK-EL-NAN-64R2-N32: "-internal-isystem"
 // CHECK-EL-NAN-64R2-N32: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-NAN-64R2-N32: "-internal-isystem"
 // CHECK-EL-NAN-64R2-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64r2/el/nan2008"
 // CHECK-EL-NAN-64R2-N32: "-internal-isystem"
 // CHECK-EL-NAN-64R2-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-NAN-64R2-N32: "-internal-externc-isystem"

 // CHECK-EL-NAN-64R2-N32: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64r2/el/nan2008"
 // CHECK-EL-NAN-64R2-N32: "-L[[TC]]/../../../../sysroot/mips64r2/el/nan2008/usr/lib"
 // CHECK-EL-NAN-64R2-N32: "[[TC]]/mips64r2/el/nan2008{{/|\\\\}}crtend.o"
 // CHECK-EL-NAN-64R2-N32: "[[TC]]/../../../../sysroot/mips64r2/el/nan2008/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips64r2, ABI n32, fp64, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64el-linux-gnu -mips64r2 -mabi=n32 -mfp64 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-NAN64-64R2-N32 %s
 // CHECK-EL-NAN64-64R2-N32: "-internal-isystem"
 // CHECK-EL-NAN64-64R2-N32: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-NAN64-64R2-N32: "-internal-isystem"
 // CHECK-EL-NAN64-64R2-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64r2/el/nan2008"
 // CHECK-EL-NAN64-64R2-N32: "-internal-isystem"
 // CHECK-EL-NAN64-64R2-N32: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-NAN64-64R2-N32: "-internal-externc-isystem"

 // CHECK-EL-NAN64-64R2-N32: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64r2/el/nan2008"
 // CHECK-EL-NAN64-64R2-N32: "-L[[TC]]/../../../../sysroot/mips64r2/el/nan2008/usr/lib"
 // CHECK-EL-NAN64-64R2-N32: "[[TC]]/mips64r2/el/nan2008{{/|\\\\}}crtend.o"
 // CHECK-EL-NAN64-64R2-N32: "[[TC]]/../../../../sysroot/mips64r2/el/nan2008/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips64r2, ABI 64, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64el-linux-gnu -mips64r2 -mabi=64 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-HF-64R2-64 %s
 // CHECK-EL-HF-64R2-64: "-internal-isystem"
 // CHECK-EL-HF-64R2-64: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-HF-64R2-64: "-internal-isystem"
 // CHECK-EL-HF-64R2-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64r2/64/el"
 // CHECK-EL-HF-64R2-64: "-internal-isystem"
 // CHECK-EL-HF-64R2-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-HF-64R2-64: "-internal-externc-isystem"

 // CHECK-EL-HF-64R2-64: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64r2/64/el"
 // CHECK-EL-HF-64R2-64: "-L[[TC]]/../../../../sysroot/mips64r2/64/el/usr/lib"
 // CHECK-EL-HF-64R2-64: "[[TC]]/mips64r2/64/el{{/|\\\\}}crtend.o"
 // CHECK-EL-HF-64R2-64: "[[TC]]/../../../../sysroot/mips64r2/64/el/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips64r2, ABI 64, fp64, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64el-linux-gnu -mips64r2 -mabi=64 -mfp64 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-HF64-64R2-64 %s
 // CHECK-EL-HF64-64R2-64: "-internal-isystem"
 // CHECK-EL-HF64-64R2-64: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-HF64-64R2-64: "-internal-isystem"
 // CHECK-EL-HF64-64R2-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64r2/64/el"
 // CHECK-EL-HF64-64R2-64: "-internal-isystem"
 // CHECK-EL-HF64-64R2-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-HF64-64R2-64: "-internal-externc-isystem"

 // CHECK-EL-HF64-64R2-64: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64r2/64/el"
 // CHECK-EL-HF64-64R2-64: "-L[[TC]]/../../../../sysroot/mips64r2/64/el/usr/lib"
 // CHECK-EL-HF64-64R2-64: "[[TC]]/mips64r2/64/el{{/|\\\\}}crtend.o"
 // CHECK-EL-HF64-64R2-64: "[[TC]]/../../../../sysroot/mips64r2/64/el/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips64r2, ABI 64, soft float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64el-linux-gnu -mips64r2 -mabi=64 -msoft-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-SF-64R2-64 %s
 // CHECK-EL-SF-64R2-64: "-internal-isystem"
 // CHECK-EL-SF-64R2-64: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-SF-64R2-64: "-internal-isystem"
 // CHECK-EL-SF-64R2-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64r2/64/el/sof"
 // CHECK-EL-SF-64R2-64: "-internal-isystem"
 // CHECK-EL-SF-64R2-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-SF-64R2-64: "-internal-externc-isystem"

 // CHECK-EL-SF-64R2-64: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64r2/64/el/sof"
 // CHECK-EL-SF-64R2-64: "-L[[TC]]/../../../../sysroot/mips64r2/64/el/sof/usr/lib"
 // CHECK-EL-SF-64R2-64: "[[TC]]/mips64r2/64/el/sof{{/|\\\\}}crtend.o"
 // CHECK-EL-SF-64R2-64: "[[TC]]/../../../../sysroot/mips64r2/64/el/sof/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips64r2, ABI 64, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64el-linux-gnu -mips64r2 -mabi=64 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-NAN-64R2-64 %s
 // CHECK-EL-NAN-64R2-64: "-internal-isystem"
 // CHECK-EL-NAN-64R2-64: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-NAN-64R2-64: "-internal-isystem"
 // CHECK-EL-NAN-64R2-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64r2/64/el/nan2008"
 // CHECK-EL-NAN-64R2-64: "-internal-isystem"
 // CHECK-EL-NAN-64R2-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-NAN-64R2-64: "-internal-externc-isystem"

 // CHECK-EL-NAN-64R2-64: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64r2/64/el/nan2008"
 // CHECK-EL-NAN-64R2-64: "-L[[TC]]/../../../../sysroot/mips64r2/64/el/nan2008/usr/lib"
 // CHECK-EL-NAN-64R2-64: "[[TC]]/mips64r2/64/el/nan2008{{/|\\\\}}crtend.o"
 // CHECK-EL-NAN-64R2-64: "[[TC]]/../../../../sysroot/mips64r2/64/el/nan2008/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips64r2, ABI 64, fp64, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64el-linux-gnu -mips64r2 -mabi=64 -mfp64 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-NAN64-64R2-64 %s
 // CHECK-EL-NAN64-64R2-64: "-internal-isystem"
 // CHECK-EL-NAN64-64R2-64: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-NAN64-64R2-64: "-internal-isystem"
 // CHECK-EL-NAN64-64R2-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64r2/64/el/nan2008"
 // CHECK-EL-NAN64-64R2-64: "-internal-isystem"
 // CHECK-EL-NAN64-64R2-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-NAN64-64R2-64: "-internal-externc-isystem"

 // CHECK-EL-NAN64-64R2-64: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64r2/64/el/nan2008"
 // CHECK-EL-NAN64-64R2-64: "-L[[TC]]/../../../../sysroot/mips64r2/64/el/nan2008/usr/lib"
 // CHECK-EL-NAN64-64R2-64: "[[TC]]/mips64r2/64/el/nan2008{{/|\\\\}}crtend.o"
 // CHECK-EL-NAN64-64R2-64: "[[TC]]/../../../../sysroot/mips64r2/64/el/nan2008/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, default (mips64r2), ABI 64, fp64, nan2008
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64el-linux-gnu -mabi=64 -mfp64 -mnan=2008 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-EL-NAN64-64R2-64-DEF %s
 // CHECK-EL-NAN64-64R2-64-DEF: "-internal-isystem"
 // CHECK-EL-NAN64-64R2-64-DEF: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-EL-NAN64-64R2-64-DEF: "-internal-isystem"
 // CHECK-EL-NAN64-64R2-64-DEF: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64r2/64/el/nan2008"
 // CHECK-EL-NAN64-64R2-64-DEF: "-internal-isystem"
 // CHECK-EL-NAN64-64R2-64-DEF: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-EL-NAN64-64R2-64-DEF: "-internal-externc-isystem"

 // CHECK-EL-NAN64-64R2-64-DEF: "[[TC]]/mips64r2/64/el/nan2008{{/|\\\\}}crtend.o"
 // CHECK-EL-NAN64-64R2-64-DEF: "[[TC]]/../../../../sysroot/mips64r2/64/el/nan2008/usr/lib{{/|\\\\}}crtn.o"
 //
 // Check that mips32r3 and mips32r5 are equal to mips32r2
 //
 // = Big-endian, mips32r3, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mips32r3 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-HF-32R3 %s
 // CHECK-BE-HF-32R3: "-internal-isystem"
 // CHECK-BE-HF-32R3: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-HF-32R3: "-internal-isystem"
 // CHECK-BE-HF-32R3: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu"
 // CHECK-BE-HF-32R3: "-internal-isystem"
 // CHECK-BE-HF-32R3: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-HF-32R3: "-internal-externc-isystem"

 // CHECK-BE-HF-32R3: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib"
 // CHECK-BE-HF-32R3: "-L[[TC]]/../../../../sysroot/usr/lib/../lib"
 // CHECK-BE-HF-32R3: "[[TC]]{{/|\\\\}}crtend.o"
 // CHECK-BE-HF-32R3: "[[TC]]/../../../../sysroot/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips32r5, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-linux-gnu -mips32r5 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-HF-32R5 %s
 // CHECK-BE-HF-32R5: "-internal-isystem"
 // CHECK-BE-HF-32R5: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-HF-32R5: "-internal-isystem"
 // CHECK-BE-HF-32R5: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu"
 // CHECK-BE-HF-32R5: "-internal-isystem"
 // CHECK-BE-HF-32R5: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-HF-32R5: "-internal-externc-isystem"

 // CHECK-BE-HF-32R5: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/../lib"
 // CHECK-BE-HF-32R5: "-L[[TC]]/../../../../sysroot/usr/lib/../lib"
 // CHECK-BE-HF-32R5: "[[TC]]{{/|\\\\}}crtend.o"
 // CHECK-BE-HF-32R5: "[[TC]]/../../../../sysroot/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips64r3, ABI 64, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64-linux-gnu -mips64r3 -mabi=64 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-HF-64R3-64 %s
 // CHECK-BE-HF-64R3-64: "-internal-isystem"
 // CHECK-BE-HF-64R3-64: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-HF-64R3-64: "-internal-isystem"
 // CHECK-BE-HF-64R3-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64r2/64"
 // CHECK-BE-HF-64R3-64: "-internal-isystem"
 // CHECK-BE-HF-64R3-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-HF-64R3-64: "-internal-externc-isystem"

 // CHECK-BE-HF-64R3-64: "-L[[TC]]/../../../../mips-mti-linux-gnu/lib/mips64r2/64"
 // CHECK-BE-HF-64R3-64: "-L[[TC]]/../../../../sysroot/mips64r2/64/usr/lib"
 // CHECK-BE-HF-64R3-64: "[[TC]]/mips64r2/64{{/|\\\\}}crtend.o"
 // CHECK-BE-HF-64R3-64: "[[TC]]/../../../../sysroot/mips64r2/64/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips64r5, ABI 64, hard float
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64-linux-gnu -mips64r5 -mabi=64 -mhard-float \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_fsf_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_fsf_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-HF-64R5-64 %s
 // CHECK-BE-HF-64R5-64: "-internal-isystem"
 // CHECK-BE-HF-64R5-64: "[[TC:[^"]+/lib/gcc/mips-mti-linux-gnu/4.9.0]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-HF-64R5-64: "-internal-isystem"
 // CHECK-BE-HF-64R5-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/mips-mti-linux-gnu/mips64r2/64"
 // CHECK-BE-HF-64R5-64: "-internal-isystem"
 // CHECK-BE-HF-64R5-64: "[[TC]]/../../../../mips-mti-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-HF-64R5-64: "-internal-externc-isystem"

test/Driver/mips-img.cpp

 // Check frontend and linker invocations on the IMG MIPS toolchain.
 //
 // = Big-endian, mips32r6
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-img-linux-gnu -mips32r6 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_img_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_img_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-32R6 %s
 // CHECK-BE-32R6: "-internal-isystem"
 // CHECK-BE-32R6: "[[TC:[^"]+/lib/gcc/mips-img-linux-gnu/4.9.0]]/../../../../mips-img-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-32R6: "-internal-isystem"
 // CHECK-BE-32R6: "[[TC]]/../../../../mips-img-linux-gnu/include/c++/4.9.0/mips-img-linux-gnu"
 // CHECK-BE-32R6: "-internal-isystem"
 // CHECK-BE-32R6: "[[TC]]/../../../../mips-img-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-32R6: "-internal-externc-isystem"

 // CHECK-BE-32R6: "-L[[TC]]/../../../../mips-img-linux-gnu/lib/../lib"
 // CHECK-BE-32R6: "-L[[TC]]/../../../../sysroot/usr/lib/../lib"
 // CHECK-BE-32R6: "[[TC]]{{/|\\\\}}crtend.o"
 // CHECK-BE-32R6: "[[TC]]/../../../../sysroot/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips32r6
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips-img-linux-gnu -mips32r6 -EL \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_img_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_img_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-LE-32R6 %s
 // CHECK-LE-32R6: "-internal-isystem"
 // CHECK-LE-32R6: "[[TC:[^"]+/lib/gcc/mips-img-linux-gnu/4.9.0]]/../../../../mips-img-linux-gnu/include/c++/4.9.0"
 // CHECK-LE-32R6: "-internal-isystem"
 // CHECK-LE-32R6: "[[TC]]/../../../../mips-img-linux-gnu/include/c++/4.9.0/mips-img-linux-gnu/el"
 // CHECK-LE-32R6: "-internal-isystem"
 // CHECK-LE-32R6: "[[TC]]/../../../../mips-img-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-LE-32R6: "-internal-externc-isystem"

 // CHECK-LE-32R6: "-L[[TC]]/../../../../mips-img-linux-gnu/lib/../lib/el"
 // CHECK-LE-32R6: "-L[[TC]]/../../../../sysroot/el/usr/lib/../lib"
 // CHECK-LE-32R6: "[[TC]]/el{{/|\\\\}}crtend.o"
 // CHECK-LE-32R6: "[[TC]]/../../../../sysroot/el/usr/lib/../lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips64r6, N32
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64-img-linux-gnu -mips64r6 -mabi=n32 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_img_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_img_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-64R6-N32 %s
 // CHECK-BE-64R6-N32: "-internal-isystem"
 // CHECK-BE-64R6-N32: "[[TC:[^"]+/lib/gcc/mips-img-linux-gnu/4.9.0]]/../../../../mips-img-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-64R6-N32: "-internal-isystem"
 // CHECK-BE-64R6-N32: "[[TC]]/../../../../mips-img-linux-gnu/include/c++/4.9.0/mips-img-linux-gnu/mips64r6"
 // CHECK-BE-64R6-N32: "-internal-isystem"
 // CHECK-BE-64R6-N32: "[[TC]]/../../../../mips-img-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-64R6-N32: "-internal-externc-isystem"

 // CHECK-BE-64R6-N32: "-L[[TC]]/../../../../mips-img-linux-gnu/lib/mips64r6"
 // CHECK-BE-64R6-N32: "-L[[TC]]/../../../../sysroot/mips64r6/usr/lib"
 // CHECK-BE-64R6-N32: "[[TC]]/mips64r6{{/|\\\\}}crtend.o"
 // CHECK-BE-64R6-N32: "[[TC]]/../../../../sysroot/mips64r6/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips64r6, N32
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64-img-linux-gnu -mips64r6 -EL -mabi=n32 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_img_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_img_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-LE-64R6-N32 %s
 // CHECK-LE-64R6-N32: "-internal-isystem"
 // CHECK-LE-64R6-N32: "[[TC:[^"]+/lib/gcc/mips-img-linux-gnu/4.9.0]]/../../../../mips-img-linux-gnu/include/c++/4.9.0"
 // CHECK-LE-64R6-N32: "-internal-isystem"
 // CHECK-LE-64R6-N32: "[[TC]]/../../../../mips-img-linux-gnu/include/c++/4.9.0/mips-img-linux-gnu/mips64r6/el"
 // CHECK-LE-64R6-N32: "-internal-isystem"
 // CHECK-LE-64R6-N32: "[[TC]]/../../../../mips-img-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-LE-64R6-N32: "-internal-externc-isystem"

 // CHECK-LE-64R6-N32: "-L[[TC]]/../../../../mips-img-linux-gnu/lib/mips64r6/el"
 // CHECK-LE-64R6-N32: "-L[[TC]]/../../../../sysroot/mips64r6/el/usr/lib"
 // CHECK-LE-64R6-N32: "[[TC]]/mips64r6/el{{/|\\\\}}crtend.o"
 // CHECK-LE-64R6-N32: "[[TC]]/../../../../sysroot/mips64r6/el/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Big-endian, mips64r6, N64
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64-img-linux-gnu -mips64r6 -mabi=64 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_img_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_img_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-BE-64R6-N64 %s
 // CHECK-BE-64R6-N64: "-internal-isystem"
 // CHECK-BE-64R6-N64: "[[TC:[^"]+/lib/gcc/mips-img-linux-gnu/4.9.0]]/../../../../mips-img-linux-gnu/include/c++/4.9.0"
 // CHECK-BE-64R6-N64: "-internal-isystem"
 // CHECK-BE-64R6-N64: "[[TC]]/../../../../mips-img-linux-gnu/include/c++/4.9.0/mips-img-linux-gnu/mips64r6/64"
 // CHECK-BE-64R6-N64: "-internal-isystem"
 // CHECK-BE-64R6-N64: "[[TC]]/../../../../mips-img-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-BE-64R6-N64: "-internal-externc-isystem"

 // CHECK-BE-64R6-N64: "-L[[TC]]/../../../../mips-img-linux-gnu/lib/mips64r6/64"
 // CHECK-BE-64R6-N64: "-L[[TC]]/../../../../sysroot/mips64r6/64/usr/lib"
 // CHECK-BE-64R6-N64: "[[TC]]/mips64r6/64{{/|\\\\}}crtend.o"
 // CHECK-BE-64R6-N64: "[[TC]]/../../../../sysroot/mips64r6/64/usr/lib{{/|\\\\}}crtn.o"
 //
 // = Little-endian, mips64r6, N64
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     --target=mips64-img-linux-gnu -mips64r6 -EL -mabi=64 \
-// RUN:     --gcc-toolchain=%S/Inputs/mips_img_tree \
+// RUN:     -stdlib=libstdc++ --gcc-toolchain=%S/Inputs/mips_img_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-LE-64R6-N64 %s
 // CHECK-LE-64R6-N64: "-internal-isystem"
 // CHECK-LE-64R6-N64: "[[TC:[^"]+/lib/gcc/mips-img-linux-gnu/4.9.0]]/../../../../mips-img-linux-gnu/include/c++/4.9.0"
 // CHECK-LE-64R6-N64: "-internal-isystem"
 // CHECK-LE-64R6-N64: "[[TC]]/../../../../mips-img-linux-gnu/include/c++/4.9.0/mips-img-linux-gnu/mips64r6/64/el"
 // CHECK-LE-64R6-N64: "-internal-isystem"
 // CHECK-LE-64R6-N64: "[[TC]]/../../../../mips-img-linux-gnu/include/c++/4.9.0/backward"
 // CHECK-LE-64R6-N64: "-internal-externc-isystem"

test/Driver/sanitizer-ld.c

 // RUN:     -resource-dir=%S/Inputs/resource_dir \
 // RUN:     --sysroot=%S/Inputs/basic_freebsd_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-ASAN-FREEBSD-LDL %s
 //
 // CHECK-ASAN-FREEBSD-LDL: "{{(.*[^-.0-9A-Z_a-z])?}}ld{{(.exe)?}}"
 // CHECK-ASAN-FREEBSD-LDL-NOT: "-ldl"
 
 // RUN: %clangxx -no-canonical-prefixes %s -### -o %t.o 2>&1 \
-// RUN:     -target i386-unknown-linux -fsanitize=address \
+// RUN:     -target i386-unknown-linux -stdlib=libstdc++ -fsanitize=address \
 // RUN:     -resource-dir=%S/Inputs/empty_resource_dir \
 // RUN:     --sysroot=%S/Inputs/basic_linux_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-ASAN-LINUX-CXX %s
 //
 // CHECK-ASAN-LINUX-CXX: "{{(.*[^-.0-9A-Z_a-z])?}}ld{{(.exe)?}}"
 // CHECK-ASAN-LINUX-CXX-NOT: "-lc"
 // CHECK-ASAN-LINUX-CXX: "-whole-archive" "{{.*}}libclang_rt.asan-i386.a" "-no-whole-archive"
 // CHECK-ASAN-LINUX-CXX: "-whole-archive" "{{.*}}libclang_rt.asan_cxx-i386.a" "-no-whole-archive"
 // CHECK-ASAN-LINUX-CXX-NOT: "--dynamic-list"
 // CHECK-ASAN-LINUX-CXX: "-export-dynamic"
 // CHECK-ASAN-LINUX-CXX: stdc++
 // CHECK-ASAN-LINUX-CXX: "-lpthread"
 // CHECK-ASAN-LINUX-CXX: "-lrt"
 // CHECK-ASAN-LINUX-CXX: "-ldl"
 
 // RUN: %clang -no-canonical-prefixes %s -### -o /dev/null -fsanitize=address \
-// RUN:     -target i386-unknown-linux --sysroot=%S/Inputs/basic_linux_tree \
-// RUN:     -lstdc++ -static 2>&1 \
+// RUN:     -target i386-unknown-linux -stdlib=libstdc++ \
+// RUN:     --sysroot=%S/Inputs/basic_linux_tree -lstdc++ -static 2>&1 \
 // RUN:   | FileCheck --check-prefix=CHECK-ASAN-LINUX-CXX-STATIC %s
 //
 // CHECK-ASAN-LINUX-CXX-STATIC: "{{(.*[^-.0-9A-Z_a-z])?}}ld{{(.exe)?}}"
 // CHECK-ASAN-LINUX-CXX-STATIC-NOT: stdc++
 // CHECK-ASAN-LINUX-CXX-STATIC: "-whole-archive" "{{.*}}libclang_rt.asan-i386.a" "-no-whole-archive"
 // CHECK-ASAN-LINUX-CXX-STATIC: stdc++
 
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \

 // RUN:   | FileCheck --check-prefix=CHECK-ASAN-ANDROID-SHARED %s
 //
 // CHECK-ASAN-ANDROID-SHARED: "{{(.*[^.0-9A-Z_a-z])?}}ld{{(.exe)?}}"
 // CHECK-ASAN-ANDROID-SHARED-NOT: "-lc"
 // CHECK-ASAN-ANDROID-SHARED: libclang_rt.asan-arm-android.so"
 // CHECK-ASAN-ANDROID-SHARED-NOT: "-lpthread"
 
 // RUN: %clangxx -no-canonical-prefixes %s -### -o %t.o 2>&1 \
-// RUN:     -target x86_64-unknown-linux -lstdc++ -fsanitize=thread \
+// RUN:     -target x86_64-unknown-linux -stdlib=libstdc++ -lstdc++ \
+// RUN:     -fsanitize=thread \
 // RUN:     -resource-dir=%S/Inputs/resource_dir \
 // RUN:     --sysroot=%S/Inputs/basic_linux_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-TSAN-LINUX-CXX %s
 //
 // CHECK-TSAN-LINUX-CXX: "{{(.*[^-.0-9A-Z_a-z])?}}ld{{(.exe)?}}"
 // CHECK-TSAN-LINUX-CXX-NOT: stdc++
 // CHECK-TSAN-LINUX-CXX: "-whole-archive" "{{.*}}libclang_rt.tsan-x86_64.a" "-no-whole-archive"
 // CHECK-TSAN-LINUX-CXX: "--dynamic-list={{.*}}libclang_rt.tsan-x86_64.a.syms"
 // CHECK-TSAN-LINUX-CXX: "-whole-archive" "{{.*}}libclang_rt.tsan_cxx-x86_64.a" "-no-whole-archive"
 // CHECK-TSAN-LINUX-CXX: "--dynamic-list={{.*}}libclang_rt.tsan_cxx-x86_64.a.syms"
 // CHECK-TSAN-LINUX-CXX-NOT: "-export-dynamic"
 // CHECK-TSAN-LINUX-CXX: stdc++
 // CHECK-TSAN-LINUX-CXX: "-lpthread"
 // CHECK-TSAN-LINUX-CXX: "-lrt"
 // CHECK-TSAN-LINUX-CXX: "-ldl"
 
 // RUN: %clangxx -no-canonical-prefixes %s -### -o %t.o 2>&1 \
-// RUN:     -target x86_64-unknown-linux -lstdc++ -fsanitize=memory \
+// RUN:     -target x86_64-unknown-linux -stdlib=libstdc++ -lstdc++ \
+// RUN:     -fsanitize=memory \
 // RUN:     -resource-dir=%S/Inputs/resource_dir \
 // RUN:     --sysroot=%S/Inputs/basic_linux_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-MSAN-LINUX-CXX %s
 //
 // CHECK-MSAN-LINUX-CXX: "{{(.*[^-.0-9A-Z_a-z])?}}ld{{(.exe)?}}"
 // CHECK-MSAN-LINUX-CXX-NOT: stdc++
 // CHECK-MSAN-LINUX-CXX: "-whole-archive" "{{.*}}libclang_rt.msan-x86_64.a" "-no-whole-archive"
 // CHECK-MSAN-LINUX-CXX: "--dynamic-list={{.*}}libclang_rt.msan-x86_64.a.syms"

 // RUN:     -target i386-unknown-linux \
 // RUN:     --sysroot=%S/Inputs/basic_linux_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-UBSAN-LINUX-LINK-CXX %s
 // CHECK-UBSAN-LINUX-LINK-CXX-NOT: "-lstdc++"
 // CHECK-UBSAN-LINUX-LINK-CXX: "-whole-archive" "{{.*}}libclang_rt.ubsan_standalone_cxx-i386.a" "-no-whole-archive"
 // CHECK-UBSAN-LINUX-LINK-CXX-NOT: "-lstdc++"
 
 // RUN: %clangxx -fsanitize=undefined %s -### -o %t.o 2>&1 \
-// RUN:     -target i386-unknown-linux \
+// RUN:     -target i386-unknown-linux -stdlib=libstdc++ \
 // RUN:     -resource-dir=%S/Inputs/resource_dir \
 // RUN:     --sysroot=%S/Inputs/basic_linux_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-UBSAN-LINUX-CXX %s
 // CHECK-UBSAN-LINUX-CXX: "{{.*}}ld{{(.exe)?}}"
 // CHECK-UBSAN-LINUX-CXX-NOT: libclang_rt.asan
 // CHECK-UBSAN-LINUX-CXX: "-whole-archive" "{{.*}}libclang_rt.ubsan_standalone-i386.a" "-no-whole-archive"
 // CHECK-UBSAN-LINUX-CXX-NOT: libclang_rt.asan
 // CHECK-UBSAN-LINUX-CXX: "-whole-archive" "{{.*}}libclang_rt.ubsan_standalone_cxx-i386.a" "-no-whole-archive"
 // CHECK-UBSAN-LINUX-CXX-NOT: libclang_rt.asan
 // CHECK-UBSAN-LINUX-CXX: "-lstdc++"
 // CHECK-UBSAN-LINUX-CXX-NOT: libclang_rt.asan
 // CHECK-UBSAN-LINUX-CXX: "-lpthread"
 
 // RUN: %clang -fsanitize=address,undefined %s -### -o %t.o 2>&1 \
 // RUN:     -target i386-unknown-linux \
 // RUN:     --sysroot=%S/Inputs/basic_linux_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-ASAN-UBSAN-LINUX %s
 // CHECK-ASAN-UBSAN-LINUX: "{{.*}}ld{{(.exe)?}}"
 // CHECK-ASAN-UBSAN-LINUX: "-whole-archive" "{{.*}}libclang_rt.asan-i386.a" "-no-whole-archive"
 // CHECK-ASAN-UBSAN-LINUX-NOT: libclang_rt.ubsan
 // CHECK-ASAN-UBSAN-LINUX-NOT: "-lstdc++"
 // CHECK-ASAN-UBSAN-LINUX: "-lpthread"
 
 // RUN: %clangxx -fsanitize=address,undefined %s -### -o %t.o 2>&1 \
-// RUN:     -target i386-unknown-linux \
+// RUN:     -target i386-unknown-linux -stdlib=libstdc++ \
 // RUN:     --sysroot=%S/Inputs/basic_linux_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-ASAN-UBSAN-LINUX-CXX %s
 // CHECK-ASAN-UBSAN-LINUX-CXX: "{{.*}}ld{{(.exe)?}}"
 // CHECK-ASAN-UBSAN-LINUX-CXX: "-whole-archive" "{{.*}}libclang_rt.asan-i386.a" "-no-whole-archive"
 // CHECK-ASAN-UBSAN-LINUX-CXX: "-whole-archive" "{{.*}}libclang_rt.asan_cxx-i386.a" "-no-whole-archive"
 // CHECK-ASAN-UBSAN-LINUX-CXX-NOT: libclang_rt.ubsan
 // CHECK-ASAN-UBSAN-LINUX-CXX: "-lstdc++"
 // CHECK-ASAN-UBSAN-LINUX-CXX: "-lpthread"

 // RUN:     -target x86_64-unknown-linux \
 // RUN:     --sysroot=%S/Inputs/basic_linux_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-CFI-CROSS-DSO-DIAG-LINUX %s
 // CHECK-CFI-CROSS-DSO-DIAG-LINUX: "{{.*}}ld{{(.exe)?}}"
 // CHECK-CFI-CROSS-DSO-DIAG-LINUX: "-whole-archive" "{{[^"]*}}libclang_rt.cfi_diag-x86_64.a" "-no-whole-archive"
 
 // RUN: %clangxx -fsanitize=address %s -### -o %t.o 2>&1 \
 // RUN:     -mmacosx-version-min=10.6 \
-// RUN:     -target x86_64-apple-darwin13.4.0 \
+// RUN:     -target x86_64-apple-darwin13.4.0 -stdlib=libstdc++ \
 // RUN:     --sysroot=%S/Inputs/basic_linux_tree \
 // RUN:   | FileCheck --check-prefix=CHECK-ASAN-DARWIN106-CXX %s
 // CHECK-ASAN-DARWIN106-CXX: "{{.*}}ld{{(.exe)?}}"
 // CHECK-ASAN-DARWIN106-CXX: libclang_rt.asan_osx_dynamic.dylib
 // CHECK-ASAN-DARWIN106-CXX-NOT: -lc++abi
 
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     -target x86_64-unknown-linux -fsanitize=safe-stack \

test/Driver/windows-cross.c

-// RUN: %clang -### -target armv7-windows-itanium --sysroot %S/Inputs/Windows/ARM/8.1 -B %S/Inputs/Windows/ARM/8.1/usr/bin -o /dev/null %s 2>&1 \
+// RUN: %clang -### -target armv7-windows-itanium --sysroot %S/Inputs/Windows/ARM/8.1 -B %S/Inputs/Windows/ARM/8.1/usr/bin -stdlib=libstdc++ -o /dev/null %s 2>&1 \
 // RUN:   | FileCheck %s --check-prefix CHECK-BASIC
 
 // CHECK-BASIC: armv7-windows-itanium-ld" "--sysroot={{.*}}/Inputs/Windows/ARM/8.1" "-m" "thumb2pe" "-Bdynamic" "--entry" "mainCRTStartup" "--allow-multiple-definition" "-o" "{{[^"]*}}" "{{.*}}/Inputs/Windows/ARM/8.1/usr/lib/crtbegin.obj" "-L{{.*}}/Inputs/Windows/ARM/8.1/usr/lib" "-L{{.*}}/Inputs/Windows/ARM/8.1/usr/lib/gcc" "{{.*}}.o" "-lmsvcrt" "-lgcc" "--as-needed" "-lgcc_s" "--no-as-needed"
 
-// RUN: %clang -### -target armv7-windows-itanium --sysroot %s/Inputs/Windows/ARM/8.1 -B %S/Inputs/Windows/ARM/8.1/usr/bin -rtlib=compiler-rt -o /dev/null %s 2>&1 \
+// RUN: %clang -### -target armv7-windows-itanium --sysroot %s/Inputs/Windows/ARM/8.1 -B %S/Inputs/Windows/ARM/8.1/usr/bin -rtlib=compiler-rt -stdlib=libstdc++ -o /dev/null %s 2>&1 \
 // RUN:   | FileCheck %s --check-prefix CHECK-RTLIB
 
 // CHECK-RTLIB: armv7-windows-itanium-ld" "--sysroot={{.*}}/Inputs/Windows/ARM/8.1" "-m" "thumb2pe" "-Bdynamic" "--entry" "mainCRTStartup" "--allow-multiple-definition" "-o" "{{[^"]*}}" "{{.*}}/Inputs/Windows/ARM/8.1/usr/lib/crtbegin.obj" "-L{{.*}}/Inputs/Windows/ARM/8.1/usr/lib" "-L{{.*}}/Inputs/Windows/ARM/8.1/usr/lib/gcc" "{{.*}}.o" "-lmsvcrt" "{{.*[\\/]}}clang_rt.builtins-arm.lib"
 
 // RUN: %clang -### -target armv7-windows-itanium --sysroot %S/Inputs/Windows/ARM/8.1 -B %S/Inputs/Windows/ARM/8.1/usr/bin -rtlib=compiler-rt -stdlib=libc++ -o /dev/null %s 2>&1 \
 // RUN:   | FileCheck %s --check-prefix CHECK-C-LIBCXX
 
 // CHECK-C-LIBCXX: armv7-windows-itanium-ld" "--sysroot={{.*}}/Inputs/Windows/ARM/8.1" "-m" "thumb2pe" "-Bdynamic" "--entry" "mainCRTStartup" "--allow-multiple-definition" "-o" "{{[^"]*}}" "{{.*}}/Inputs/Windows/ARM/8.1/usr/lib/crtbegin.obj" "{{.*}}.o" "-lmsvcrt" "{{.*[\\/]}}clang_rt.builtins-arm.lib"

 
 // CHECK-NOSTARTFILES: armv7-windows-itanium-ld" "--sysroot={{.*}}/Inputs/Windows/ARM/8.1" "-m" "thumb2pe" "-shared" "-Bdynamic" "--enable-auto-image-base" "--entry" "_DllMainCRTStartup" "--allow-multiple-definition" "-o" "shared.dll" "--out-implib" "shared.lib" "{{.*}}.o" "-lmsvcrt" "{{.*[\\/]}}clang_rt.builtins-arm.lib"
 
 // RUN: %clang -### -target armv7-windows-itanium --sysroot %S/Inputs/Windows/ARM/8.1 -B %S/Inputs/Windows/ARM/8.1/usr/bin -shared -rtlib=compiler-rt -stdlib=libc++ -nostartfiles -nodefaultlibs -o shared.dll %s 2>&1 \
 // RUN:   | FileCheck %s --check-prefix CHECK-STANDALONE
 
 // CHECK-STANDALONE: armv7-windows-itanium-ld" "--sysroot={{.*}}/Inputs/Windows/ARM/8.1" "-m" "thumb2pe" "-shared" "-Bdynamic" "--enable-auto-image-base" "--entry" "_DllMainCRTStartup" "--allow-multiple-definition" "-o" "shared.dll" "--out-implib" "shared.lib" "{{.*}}.o"
 
-// RUN: %clang -### -target armv7-windows-itanium --sysroot %S/Inputs/Windows/ARM/8.1 -B %/Inputs/Windows/ARM/8.1/usr/bin -shared -o shared.dll -x c++ %s 2>&1 \
+// RUN: %clang -### -target armv7-windows-itanium --sysroot %S/Inputs/Windows/ARM/8.1 -B %/Inputs/Windows/ARM/8.1/usr/bin -stdlib=libstdc++ -shared -o shared.dll -x c++ %s 2>&1 \
 // RUN:    | FileCheck %s --check-prefix CHECK-LIBSTDCXX
 
 // CHECK-LIBSTDCXX:  "-internal-isystem" "{{.*}}/usr/include/c++" "-internal-isystem" "{{.*}}/usr/include/c++/armv7--windows-itanium" "-internal-isystem" "{{.*}}/usr/include/c++/backwards"
 
 // RUN: %clang -### -target armv7-windows-itanium --sysroot %S/Inputs/Windows/ARM/8.1 -B %S/Inputs/Windows/ARM/8.1/usr/bin -fuse-ld=lld-link2 -shared -o shared.dll -x c++ %s 2>&1 \
 // RUN:    | FileCheck %s --check-prefix CHECK-FUSE-LD
 
 // CHECK-FUSE-LD: "{{.*}}lld-link2"

unittests/libclang/LibclangTest.cpp

TEST_F(LibclangReparseTest, clang_parseTranslationUnit2FullArgv) {
 
   std::string Filename = "test.cc";
   WriteFile(Filename, "#include <vector>\n");
 
   std::string Clang = "bin/clang";
   WriteFile(Clang, "");
 
   const char *Argv[] = {Clang.c_str(), "-target", "arm-linux-gnueabi",
-                        "--gcc-toolchain="};
+                        "-stdlib=libstdc++", "--gcc-toolchain="};
 
   EXPECT_EQ(CXError_Success,
             clang_parseTranslationUnit2FullArgv(Index, Filename.c_str(), Argv,
                                                 sizeof(Argv) / sizeof(Argv[0]),
                                                 nullptr, 0, TUFlags, &ClangTU));
   EXPECT_EQ(0U, clang_getNumDiagnostics(ClangTU));
   DisplayDiagnostics();
 }