[Driver] Support -muclibc / -mglibc command line options

[atanasyan]

Summary

The uCLibc library supports multiple architectures. A couple of MIPS toolchains contains both uCLibc and glibc implementation so these options allow to select used C library. Initially -muclibc / -mglibc (as well as -mbionic) have been implemented in gcc.

[joerg]

Is there a good reason for not switching them via a single option with value, e.g. -mlibc=musl, -mlibc=glibc etc?

[atanasyan]

-muclibc / -mglibc come from gcc. I think we need to keep their names as-is for compatibility.

[atanasyan]

Ping?

[• rafael]

I tried the patch locally, but two tests fails:

Clang :: Driver/mips-cs.cpp
Clang :: Driver/mips-fsf.cpp

/home/espindola/llvm/clang/test/Driver/mips-cs.cpp:39:23: error: expected string not found in input
// CHECK-BE-UC-HF-32: "[[TC]]/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu/uclibc"

^

<stdin>:4:622: note: scanning from here
"/home/espindola/llvm/build/./bin/clang" "-cc1" "-triple" "mips--linux-gnu" "-S" "-disable-free" "-main-file-name" "mips-cs.cpp" "-mrelocation-model" "static" "-mdisable-fp-elim" "-fmath-errno" "-no-integrated-as" "-mconstructor-aliases" "-target-cpu" "mips32r2" "-target-feature" "-n64" "-target-feature" "+o32" "-target-abi" "o32" "-mfloat-abi" "hard" "-dwarf-column-info" "-resource-dir" "/home/espindola/llvm/build/./bin/../lib/clang/3.6.0" "-internal-isystem" "/home/espindola/llvm/clang/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/../../../../mips-linux-gnu/include/c++/4.6.3" "-internal-isystem" "/home/espindola/llvm/clang/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu" "-internal-isystem" "/home/espindola/llvm/clang/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/../../../../mips-linux-gnu/include/c++/4.6.3/backward" "-internal-isystem" "/home/espindola/llvm/clang/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/../../../../mips-linux-gnu/libc/usr/local/include" "-internal-isystem" "/home/espindola/llvm/build/./bin/../lib/clang/3.6.0/include" "-internal-externc-isystem" "/home/espindola/llvm/clang/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/../../../../mips-linux-gnu/libc/include" "-internal-externc-isystem" "/home/espindola/llvm/clang/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/../../../../mips-linux-gnu/libc/usr/include" "-fdeprecated-macro" "-fno-dwarf-directory-asm" "-fdebug-compilation-dir" "/home/espindola/llvm/build/tools/clang/test/Driver" "-ferror-limit" "19" "-fmessage-length" "0" "-mstackrealign" "-fobjc-runtime=gcc" "-fcxx-exceptions" "-fexceptions" "-fdiagnostics-show-option" "-o" "/tmp/mips-cs-00c4ac.s" "-x" "c++" "/home/espindola/llvm/clang/test/Driver/mips-cs.cpp"

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             ^

<stdin>:4:622: note: with variable "TC" equal to "/home/espindola/llvm/clang/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3"
"/home/espindola/llvm/build/./bin/clang" "-cc1" "-triple" "mips--linux-gnu" "-S" "-disable-free" "-main-file-name" "mips-cs.cpp" "-mrelocation-model" "static" "-mdisable-fp-elim" "-fmath-errno" "-no-integrated-as" "-mconstructor-aliases" "-target-cpu" "mips32r2" "-target-feature" "-n64" "-target-feature" "+o32" "-target-abi" "o32" "-mfloat-abi" "hard" "-dwarf-column-info" "-resource-dir" "/home/espindola/llvm/build/./bin/../lib/clang/3.6.0" "-internal-isystem" "/home/espindola/llvm/clang/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/../../../../mips-linux-gnu/include/c++/4.6.3" "-internal-isystem" "/home/espindola/llvm/clang/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu" "-internal-isystem" "/home/espindola/llvm/clang/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/../../../../mips-linux-gnu/include/c++/4.6.3/backward" "-internal-isystem" "/home/espindola/llvm/clang/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/../../../../mips-linux-gnu/libc/usr/local/include" "-internal-isystem" "/home/espindola/llvm/build/./bin/../lib/clang/3.6.0/include" "-internal-externc-isystem" "/home/espindola/llvm/clang/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/../../../../mips-linux-gnu/libc/include" "-internal-externc-isystem" "/home/espindola/llvm/clang/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/../../../../mips-linux-gnu/libc/usr/include" "-fdeprecated-macro" "-fno-dwarf-directory-asm" "-fdebug-compilation-dir" "/home/espindola/llvm/build/tools/clang/test/Driver" "-ferror-limit" "19" "-fmessage-length" "0" "-mstackrealign" "-fobjc-runtime=gcc" "-fcxx-exceptions" "-fexceptions" "-fdiagnostics-show-option" "-o" "/tmp/mips-cs-00c4ac.s" "-x" "c++" "/home/espindola/llvm/clang/test/Driver/mips-cs.cpp"

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             ^

<stdin>:4:697: note: possible intended match here
"/home/espindola/llvm/build/./bin/clang" "-cc1" "-triple" "mips--linux-gnu" "-S" "-disable-free" "-main-file-name" "mips-cs.cpp" "-mrelocation-model" "static" "-mdisable-fp-elim" "-fmath-errno" "-no-integrated-as" "-mconstructor-aliases" "-target-cpu" "mips32r2" "-target-feature" "-n64" "-target-feature" "+o32" "-target-abi" "o32" "-mfloat-abi" "hard" "-dwarf-column-info" "-resource-dir" "/home/espindola/llvm/build/./bin/../lib/clang/3.6.0" "-internal-isystem" "/home/espindola/llvm/clang/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/../../../../mips-linux-gnu/include/c++/4.6.3" "-internal-isystem" "/home/espindola/llvm/clang/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/../../../../mips-linux-gnu/include/c++/4.6.3/mips-linux-gnu" "-internal-isystem" "/home/espindola/llvm/clang/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/../../../../mips-linux-gnu/include/c++/4.6.3/backward" "-internal-isystem" "/home/espindola/llvm/clang/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/../../../../mips-linux-gnu/libc/usr/local/include" "-internal-isystem" "/home/espindola/llvm/build/./bin/../lib/clang/3.6.0/include" "-internal-externc-isystem" "/home/espindola/llvm/clang/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/../../../../mips-linux-gnu/libc/include" "-internal-externc-isystem" "/home/espindola/llvm/clang/test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/../../../../mips-linux-gnu/libc/usr/include" "-fdeprecated-macro" "-fno-dwarf-directory-asm" "-fdebug-compilation-dir" "/home/espindola/llvm/build/tools/clang/test/Driver" "-ferror-limit" "19" "-fmessage-length" "0" "-mstackrealign" "-fobjc-runtime=gcc" "-fcxx-exceptions" "-fexceptions" "-fdiagnostics-show-option" "-o" "/tmp/mips-cs-00c4ac.s" "-x" "c++" "/home/espindola/llvm/clang/test/Driver/mips-cs.cpp"

[atanasyan]

Hmm, could you check that changes (new files) in the test/Driver/Inputs/mips_cs_tree and test/Driver/Inputs/mips_fsf_tree directories applied correctly? I ran arc patch D4790 command, rebuilt the Clang, ran the Clang's test suite and did not get any errors.

[• rafael]

• D4790.diff32 KBDownload

[atanasyan]

The patch you can download from the Phabricator site using the "Download Raw Diff" link is reduced. Probably it is the Phabricator's bug. This file does not contain any new .o files. This page has paths like test/Driver/Inputs/mips_cs_tree/lib/gcc/mips-linux-gnu/4.6.3/uclibc/soft-float/crtbegin.o. The D4790.diff does not have such files.

I create another patch and attach it to this message.

D4790-with-inputs.patch53 KBDownload

[• rafael]

LGTM with a nit.

lib/Driver/ToolChains.cpp

1739

Since you are calling str() anyway, it might be cleaner to construct it with

String S = InstallDir + "/../../../../sysroot/";
if (...)
  S +=
 else
   S +=

[atanasyan]

Thanks for review.

Closed by commit rL215552.

include/clang/Driver/Options.td

 def i_Group               : OptionGroup<"<i group>">, Group<CompileOnly_Group>;
 def clang_i_Group         : OptionGroup<"<clang i group>">, Group<i_Group>;
 def m_Group               : OptionGroup<"<m group>">, Group<CompileOnly_Group>;
 def m_x86_Features_Group  : OptionGroup<"<m x86 features group>">, Group<m_Group>, Flags<[CoreOption]>;
 def m_hexagon_Features_Group  : OptionGroup<"<m hexagon features group>">, Group<m_Group>;
 def m_arm_Features_Group  : OptionGroup<"<m arm features group>">, Group<m_Group>;
 def m_aarch64_Features_Group  : OptionGroup<"<m aarch64 features group>">, Group<m_Group>;
 def m_ppc_Features_Group  : OptionGroup<"<m ppc features group>">, Group<m_Group>;
+def m_libc_Group          : OptionGroup<"<m libc group>">, Group<m_Group>;
 def u_Group               : OptionGroup<"<u group>">;
 
 def pedantic_Group        : OptionGroup<"<pedantic group>">,
   Group<CompileOnly_Group>;
 def reserved_lib_Group   : OptionGroup<"<reserved libs group>">;
 
 // Temporary groups for clang options which we know we don't support,
 // but don't want to verbosely warn the user about.
def mfpxx : Flag<["-"], "mfpxx">, Group<m_Group>,
   HelpText<"Avoid FPU mode dependent operations when used with the O32 ABI">,
   Flags<[HelpHidden]>;
 def modd_spreg : Flag<["-"], "modd-spreg">, Group<m_Group>,
   HelpText<"Enable odd single-precision floating point registers">,
   Flags<[HelpHidden]>;
 def mno_odd_spreg : Flag<["-"], "mno-odd-spreg">, Group<m_Group>,
   HelpText<"Disable odd single-precision floating point registers">,
   Flags<[HelpHidden]>;
+def mglibc : Flag<["-"], "mglibc">, Group<m_libc_Group>, Flags<[HelpHidden]>;
+def muclibc : Flag<["-"], "muclibc">, Group<m_libc_Group>, Flags<[HelpHidden]>;
 def module_file_info : Flag<["-"], "module-file-info">, Flags<[DriverOption,CC1Option]>, Group<Action_Group>;
 def mthumb : Flag<["-"], "mthumb">, Group<m_Group>;
 def mtune_EQ : Joined<["-"], "mtune=">, Group<m_Group>;
 def multi__module : Flag<["-"], "multi_module">;
 def multiply__defined__unused : Separate<["-"], "multiply_defined_unused">;
 def multiply__defined : Separate<["-"], "multiply_defined">;
 def mwarn_nonportable_cfstrings : Flag<["-"], "mwarn-nonportable-cfstrings">, Group<m_Group>;
 def no_canonical_prefixes : Flag<["-"], "no-canonical-prefixes">, Flags<[HelpHidden]>,

lib/Driver/ToolChains.cpp

auto MArchMips64 = makeMultilib("/mips64")
       .flag("-m32").flag("+m64").flag("-march=mips64r2");
 
     auto MArchDefault = makeMultilib("")
       .flag("+m32").flag("-m64").flag("-mmicromips").flag("+march=mips32r2");
 
     auto Mips16 = makeMultilib("/mips16")
       .flag("+mips16");
 
+    auto UCLibc = makeMultilib("/uclibc")
+      .flag("+muclibc");
+
     auto MAbi64 = makeMultilib("/64")
       .flag("+mabi=n64").flag("-mabi=n32").flag("-m32");
 
     auto BigEndian = makeMultilib("")
       .flag("+EB").flag("-EL");
 
     auto LittleEndian = makeMultilib("/el")
       .flag("+EL").flag("-EB");
 
     auto SoftFloat = makeMultilib("/sof")
       .flag("+msoft-float");
 
     auto Nan2008 = makeMultilib("/nan2008")
       .flag("+mnan=2008");
 
     FSFMipsMultilibs = MultilibSet()
       .Either(MArchMips32, MArchMicroMips, 
               MArchMips64r2, MArchMips64, MArchDefault)
+      .Maybe(UCLibc)
       .Maybe(Mips16)
       .FilterOut("/mips64/mips16")
       .FilterOut("/mips64r2/mips16")
       .FilterOut("/micromips/mips16")
       .Maybe(MAbi64)
       .FilterOut("/micromips/64")
       .FilterOut("/mips32/64")
       .FilterOut("^/64")
       .FilterOut("/mips16/64")
       .Either(BigEndian, LittleEndian)
       .Maybe(SoftFloat)
       .Maybe(Nan2008)
       .FilterOut(".*sof/nan2008")
       .FilterOut(NonExistent)
       .includeDirsCallback([](
           StringRef InstallDir, StringRef TripleStr, const Multilib &M) {
         std::vector<std::string> Dirs;
         Dirs.push_back((InstallDir + "/include").str());
-        Dirs.push_back((InstallDir + "/../../../../sysroot/usr/include").str());
+        if (StringRef(M.includeSuffix()).startswith("/uclibc"))
+          Dirs.push_back(
+              (InstallDir + "/../../../../sysroot/uclibc/usr/include").str());
+        else
+          Dirs.push_back(
+              (InstallDir + "/../../../../sysroot/usr/include").str());
         return Dirs;
       });
   }
 
   // Check for Code Sourcery toolchain multilibs
   MultilibSet CSMipsMultilibs;
   {
     auto MArchMips16 = makeMultilib("/mips16")
       .flag("+m32").flag("+mips16");
 
     auto MArchMicroMips = makeMultilib("/micromips")
       .flag("+m32").flag("+mmicromips");
 
     auto MArchDefault = makeMultilib("")
       .flag("-mips16").flag("-mmicromips");
 
+    auto UCLibc = makeMultilib("/uclibc")
+      .flag("+muclibc");
+
     auto SoftFloat = makeMultilib("/soft-float")
       .flag("+msoft-float");
 
     auto Nan2008 = makeMultilib("/nan2008")
       .flag("+mnan=2008");
 
     auto DefaultFloat = makeMultilib("")
       .flag("-msoft-float").flag("-mnan=2008");
 
     auto BigEndian = makeMultilib("")
       .flag("+EB").flag("-EL");
 
     auto LittleEndian = makeMultilib("/el")
       .flag("+EL").flag("-EB");
 
     // Note that this one's osSuffix is ""
     auto MAbi64 = makeMultilib("")
       .gccSuffix("/64")
       .includeSuffix("/64")
       .flag("+mabi=n64").flag("-mabi=n32").flag("-m32");
 
     CSMipsMultilibs = MultilibSet()
       .Either(MArchMips16, MArchMicroMips, MArchDefault)
+      .Maybe(UCLibc)
       .Either(SoftFloat, Nan2008, DefaultFloat)
       .FilterOut("/micromips/nan2008")
       .FilterOut("/mips16/nan2008")
       .Either(BigEndian, LittleEndian)
       .Maybe(MAbi64)
       .FilterOut("/mips16.*/64")
       .FilterOut("/micromips.*/64")
       .FilterOut(NonExistent)
       .includeDirsCallback([](
           StringRef InstallDir, StringRef TripleStr, const Multilib &M) {
         std::vector<std::string> Dirs;
         Dirs.push_back((InstallDir + "/include").str());
+        if (StringRef(M.includeSuffix()).startswith("/uclibc"))
+          Dirs.push_back((InstallDir + "/../../../../" + TripleStr +
+                          "/libc/uclibc/usr/include").str());
+        else
           Dirs.push_back((InstallDir + "/../../../../" + TripleStr +
                           "/libc/usr/include").str());
         return Dirs;
       });
   }
 
   MultilibSet AndroidMipsMultilibs = MultilibSet()
     .Maybe(Multilib("/mips-r2").flag("+march=mips32r2"))
     .FilterOut(NonExistent);
 
static bool findMIPSMultilibs(const llvm::Triple &TargetTriple, StringRef Path,
   addMultilibFlag(isMips64(TargetArch), "m64", Flags);
   addMultilibFlag(isMips16(Args), "mips16", Flags);
   addMultilibFlag(CPUName == "mips32", "march=mips32", Flags);
   addMultilibFlag(CPUName == "mips32r2", "march=mips32r2", Flags);
   addMultilibFlag(CPUName == "mips64", "march=mips64", Flags);
   addMultilibFlag(CPUName == "mips64r2" || CPUName == "octeon",
                   "march=mips64r2", Flags);
   addMultilibFlag(isMicroMips(Args), "mmicromips", Flags);
+  addMultilibFlag(tools::mips::isUCLibc(Args), "muclibc", Flags);
   addMultilibFlag(tools::mips::isNaN2008(Args, TargetTriple), "mnan=2008",
                   Flags);
   addMultilibFlag(ABIName == "n32", "mabi=n32", Flags);
   addMultilibFlag(ABIName == "n64", "mabi=n64", Flags);
   addMultilibFlag(isSoftFloatABI(Args), "msoft-float", Flags);
   addMultilibFlag(!isSoftFloatABI(Args), "mhard-float", Flags);
   addMultilibFlag(isMipsEL(TargetArch), "EL", Flags);
   addMultilibFlag(!isMipsEL(TargetArch), "EB", Flags);

lib/Driver/Tools.h

namespace arm {
   const char* getLLVMArchSuffixForARM(StringRef CPU);
 }
 
 namespace mips {
   void getMipsCPUAndABI(const llvm::opt::ArgList &Args,
                         const llvm::Triple &Triple, StringRef &CPUName,
                         StringRef &ABIName);
   bool hasMipsAbiArg(const llvm::opt::ArgList &Args, const char *Value);
+  bool isUCLibc(const llvm::opt::ArgList &Args);
   bool isNaN2008(const llvm::opt::ArgList &Args, const llvm::Triple &Triple);
   bool isFPXXDefault(const llvm::Triple &Triple, StringRef CPUName,
                      StringRef ABIName);
 }
 
 namespace ppc {
   bool hasPPCAbiArg(const llvm::opt::ArgList &Args, const char *Value);
 }

lib/Driver/Tools.cpp

return llvm::StringSwitch<const char *>(CPU)
     .Default("");
 }
 
 bool mips::hasMipsAbiArg(const ArgList &Args, const char *Value) {
   Arg *A = Args.getLastArg(options::OPT_mabi_EQ);
   return A && (A->getValue() == StringRef(Value));
 }
 
+bool mips::isUCLibc(const ArgList &Args) {
+  Arg *A = Args.getLastArg(options::OPT_m_libc_Group);
+  return A && A->getOption().matches(options::OPT_muclibc);
+}
+
 bool mips::isNaN2008(const ArgList &Args, const llvm::Triple &Triple) {
   if (Arg *NaNArg = Args.getLastArg(options::OPT_mnan_EQ))
     return llvm::StringSwitch<bool>(NaNArg->getValue())
                .Case("2008", true)
                .Case("legacy", false)
                .Default(false);
 
   // NaN2008 is the default for MIPS32r6/MIPS64r6.
else if (ToolChain.getArch() == llvm::Triple::arm ||
     mips::getMipsCPUAndABI(Args, ToolChain.getTriple(), CPUName, ABIName);
     bool IsNaN2008 = mips::isNaN2008(Args, ToolChain.getTriple());
 
     StringRef LibDir = llvm::StringSwitch<llvm::StringRef>(ABIName)
                            .Case("o32", "/lib")
                            .Case("n32", "/lib32")
                            .Case("n64", "/lib64")
                            .Default("/lib");
-    StringRef LibName = IsNaN2008 ? "ld-linux-mipsn8.so.1" : "ld.so.1";
+    StringRef LibName;
+    if (mips::isUCLibc(Args))
+      LibName = IsNaN2008 ? "ld-uClibc-mipsn8.so.0" : "ld-uClibc.so.0";
+    else
+      LibName = IsNaN2008 ? "ld-linux-mipsn8.so.1" : "ld.so.1";
 
     return (LibDir + "/" + LibName).str();
   } else if (ToolChain.getArch() == llvm::Triple::ppc)
     return "/lib/ld.so.1";
   else if (ToolChain.getArch() == llvm::Triple::ppc64) {
     if (ppc::hasPPCAbiArg(Args, "elfv2"))
       return "/lib64/ld64.so.2";
     return "/lib64/ld64.so.1";

test/Driver/mips-cs.cpp

 // CHECK-BE-HF-32: "[[TC]]{{/|\\\\}}crtbegin.o"
 // CHECK-BE-HF-32: "-L[[TC]]"
 // CHECK-BE-HF-32: "-L[[TC]]/../../../../mips-linux-gnu/lib/../lib"
 // 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:   | 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: "[[TC]]/include"
+// CHECK-BE-UC-HF-32: "-internal-externc-isystem"
+// CHECK-BE-UC-HF-32: "[[TC]]/../../../../mips-linux-gnu/libc/uclibc/usr/include"
+// CHECK-BE-UC-HF-32: "{{.*}}ld{{(.exe)?}}"
+// CHECK-BE-UC-HF-32: "--sysroot=[[TC]]/../../../../mips-linux-gnu/libc/uclibc"
+// CHECK-BE-UC-HF-32: "-dynamic-linker" "/lib/ld-uClibc.so.0"
+// CHECK-BE-UC-HF-32: "[[TC]]/../../../../mips-linux-gnu/libc/uclibc/usr/lib/../lib{{/|\\\\}}crt1.o"
+// CHECK-BE-UC-HF-32: "[[TC]]/../../../../mips-linux-gnu/libc/uclibc/usr/lib/../lib{{/|\\\\}}crti.o"
+// CHECK-BE-UC-HF-32: "[[TC]]/uclibc{{/|\\\\}}crtbegin.o"
+// CHECK-BE-UC-HF-32: "-L[[TC]]/uclibc"
+// CHECK-BE-UC-HF-32: "-L[[TC]]/../../../../mips-linux-gnu/lib/../lib/uclibc"
+// CHECK-BE-UC-HF-32-NOT: "-L[[TC]]"
+// 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:   | 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-NAN: "-L[[TC]]/nan2008"
 // CHECK-BE-HF-NAN: "-L[[TC]]/../../../../mips-linux-gnu/lib/../lib/nan2008"
 // CHECK-BE-HF-NAN-NOT: "-L[[TC]]"
 // 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:   | 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: "[[TC]]/include"
+// CHECK-BE-UC-HF-NAN: "-internal-externc-isystem"
+// CHECK-BE-UC-HF-NAN: "[[TC]]/../../../../mips-linux-gnu/libc/uclibc/usr/include"
+// CHECK-BE-UC-HF-NAN: "{{.*}}ld{{(.exe)?}}"
+// CHECK-BE-UC-HF-NAN: "--sysroot=[[TC]]/../../../../mips-linux-gnu/libc/uclibc/nan2008"
+// CHECK-BE-UC-HF-NAN: "-dynamic-linker" "/lib/ld-uClibc-mipsn8.so.0"
+// CHECK-BE-UC-HF-NAN: "[[TC]]/../../../../mips-linux-gnu/libc/uclibc/nan2008/usr/lib/../lib{{/|\\\\}}crt1.o"
+// CHECK-BE-UC-HF-NAN: "[[TC]]/../../../../mips-linux-gnu/libc/uclibc/nan2008/usr/lib/../lib{{/|\\\\}}crti.o"
+// CHECK-BE-UC-HF-NAN: "[[TC]]/uclibc/nan2008{{/|\\\\}}crtbegin.o"
+// CHECK-BE-UC-HF-NAN: "-L[[TC]]/uclibc/nan2008"
+// CHECK-BE-UC-HF-NAN: "-L[[TC]]/../../../../mips-linux-gnu/lib/../lib/uclibc/nan2008"
+// CHECK-BE-UC-HF-NAN-NOT: "-L[[TC]]"
+// 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:   | 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: "-L[[TC]]/soft-float"
 // CHECK-BE-SF-32: "-L[[TC]]/../../../../mips-linux-gnu/lib/../lib/soft-float"
 // CHECK-BE-SF-32-NOT: "-L[[TC]]"
 // 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:   | 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: "[[TC]]/include"
+// CHECK-BE-UC-SF-32: "-internal-externc-isystem"
+// CHECK-BE-UC-SF-32: "[[TC]]/../../../../mips-linux-gnu/libc/uclibc/usr/include"
+// CHECK-BE-UC-SF-32: "{{.*}}ld{{(.exe)?}}"
+// CHECK-BE-UC-SF-32: "--sysroot=[[TC]]/../../../../mips-linux-gnu/libc/uclibc/soft-float"
+// CHECK-BE-UC-SF-32: "-dynamic-linker" "/lib/ld-uClibc.so.0"
+// CHECK-BE-UC-SF-32: "[[TC]]/../../../../mips-linux-gnu/libc/uclibc/soft-float/usr/lib/../lib{{/|\\\\}}crt1.o"
+// CHECK-BE-UC-SF-32: "[[TC]]/../../../../mips-linux-gnu/libc/uclibc/soft-float/usr/lib/../lib{{/|\\\\}}crti.o"
+// CHECK-BE-UC-SF-32: "[[TC]]/uclibc/soft-float{{/|\\\\}}crtbegin.o"
+// CHECK-BE-UC-SF-32: "-L[[TC]]/uclibc/soft-float"
+// CHECK-BE-UC-SF-32: "-L[[TC]]/../../../../mips-linux-gnu/lib/../lib/uclibc/soft-float"
+// CHECK-BE-UC-SF-32-NOT: "-L[[TC]]"
+// 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:   | 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-EL-HF-32: "-L[[TC]]/el"
 // CHECK-EL-HF-32: "-L[[TC]]/../../../../mips-linux-gnu/lib/../lib/el"
 // CHECK-EL-HF-32-NOT: "-L[[TC]]"
 // 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:   | 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: "[[TC]]/include"
+// CHECK-EL-UC-HF-32: "-internal-externc-isystem"
+// CHECK-EL-UC-HF-32: "[[TC]]/../../../../mips-linux-gnu/libc/uclibc/usr/include"
+// CHECK-EL-UC-HF-32: "{{.*}}ld{{(.exe)?}}"
+// CHECK-EL-UC-HF-32: "--sysroot=[[TC]]/../../../../mips-linux-gnu/libc/uclibc/el"
+// CHECK-EL-UC-HF-32: "-dynamic-linker" "/lib/ld-uClibc.so.0"
+// CHECK-EL-UC-HF-32: "[[TC]]/../../../../mips-linux-gnu/libc/uclibc/el/usr/lib/../lib{{/|\\\\}}crt1.o"
+// CHECK-EL-UC-HF-32: "[[TC]]/../../../../mips-linux-gnu/libc/uclibc/el/usr/lib/../lib{{/|\\\\}}crti.o"
+// CHECK-EL-UC-HF-32: "[[TC]]/uclibc/el{{/|\\\\}}crtbegin.o"
+// CHECK-EL-UC-HF-32: "-L[[TC]]/uclibc/el"
+// CHECK-EL-UC-HF-32: "-L[[TC]]/../../../../mips-linux-gnu/lib/../lib/uclibc/el"
+// CHECK-EL-UC-HF-32-NOT: "-L[[TC]]"
+// 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:   | 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-NAN: "-L[[TC]]/nan2008/el"
 // CHECK-EL-HF-NAN: "-L[[TC]]/../../../../mips-linux-gnu/lib/../lib/nan2008/el"
 // CHECK-EL-HF-NAN-NOT: "-L[[TC]]"
 // 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:   | 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: "[[TC]]/include"
+// CHECK-EL-UC-HF-NAN: "-internal-externc-isystem"
+// CHECK-EL-UC-HF-NAN: "[[TC]]/../../../../mips-linux-gnu/libc/uclibc/usr/include"
+// CHECK-EL-UC-HF-NAN: "{{.*}}ld{{(.exe)?}}"
+// CHECK-EL-UC-HF-NAN: "--sysroot=[[TC]]/../../../../mips-linux-gnu/libc/uclibc/nan2008/el"
+// CHECK-EL-UC-HF-NAN: "-dynamic-linker" "/lib/ld-uClibc-mipsn8.so.0"
+// CHECK-EL-UC-HF-NAN: "[[TC]]/../../../../mips-linux-gnu/libc/uclibc/nan2008/el/usr/lib/../lib{{/|\\\\}}crt1.o"
+// CHECK-EL-UC-HF-NAN: "[[TC]]/../../../../mips-linux-gnu/libc/uclibc/nan2008/el/usr/lib/../lib{{/|\\\\}}crti.o"
+// CHECK-EL-UC-HF-NAN: "[[TC]]/uclibc/nan2008/el{{/|\\\\}}crtbegin.o"
+// CHECK-EL-UC-HF-NAN: "-L[[TC]]/uclibc/nan2008/el"
+// CHECK-EL-UC-HF-NAN: "-L[[TC]]/../../../../mips-linux-gnu/lib/../lib/uclibc/nan2008/el"
+// CHECK-EL-UC-HF-NAN-NOT: "-L[[TC]]"
+// 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:   | 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: "-L[[TC]]/soft-float/el"
 // CHECK-EL-SF-32: "-L[[TC]]/../../../../mips-linux-gnu/lib/../lib/soft-float/el"
 // CHECK-EL-SF-32-NOT: "-L[[TC]]"
 // 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:   | 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: "[[TC]]/include"
+// CHECK-EL-UC-SF-32: "-internal-externc-isystem"
+// CHECK-EL-UC-SF-32: "[[TC]]/../../../../mips-linux-gnu/libc/uclibc/usr/include"
+// CHECK-EL-UC-SF-32: "{{.*}}ld{{(.exe)?}}"
+// CHECK-EL-UC-SF-32: "--sysroot=[[TC]]/../../../../mips-linux-gnu/libc/uclibc/soft-float/el"
+// CHECK-EL-UC-SF-32: "-dynamic-linker" "/lib/ld-uClibc.so.0"
+// CHECK-EL-UC-SF-32: "[[TC]]/../../../../mips-linux-gnu/libc/uclibc/soft-float/el/usr/lib/../lib{{/|\\\\}}crt1.o"
+// CHECK-EL-UC-SF-32: "[[TC]]/../../../../mips-linux-gnu/libc/uclibc/soft-float/el/usr/lib/../lib{{/|\\\\}}crti.o"
+// CHECK-EL-UC-SF-32: "[[TC]]/uclibc/soft-float/el{{/|\\\\}}crtbegin.o"
+// CHECK-EL-UC-SF-32: "-L[[TC]]/uclibc/soft-float/el"
+// CHECK-EL-UC-SF-32: "-L[[TC]]/../../../../mips-linux-gnu/lib/../lib/uclibc/soft-float/el"
+// CHECK-EL-UC-SF-32-NOT: "-L[[TC]]"
+// 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:   | 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"

test/Driver/mips-fsf.cpp

 // CHECK-BE-HF-32R2: "[[TC]]/../../../../sysroot/usr/lib/../lib{{/|\\\\}}crti.o"
 // CHECK-BE-HF-32R2: "[[TC]]{{/|\\\\}}crtbegin.o"
 // CHECK-BE-HF-32R2: "-L[[TC]]"
 // 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:   | 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: "[[TC]]/include"
+// CHECK-BE-UC-HF-32R2: "-internal-externc-isystem"
+// CHECK-BE-UC-HF-32R2: "[[TC]]/../../../../sysroot/uclibc/usr/include"
+// CHECK-BE-UC-HF-32R2: "{{.*}}ld{{(.exe)?}}"
+// CHECK-BE-UC-HF-32R2: "--sysroot=[[TC]]/../../../../sysroot/uclibc"
+// CHECK-BE-UC-HF-32R2: "-dynamic-linker" "/lib/ld-uClibc.so.0"
+// CHECK-BE-UC-HF-32R2: "[[TC]]/../../../../sysroot/uclibc/usr/lib/../lib{{/|\\\\}}crt1.o"
+// CHECK-BE-UC-HF-32R2: "[[TC]]/../../../../sysroot/uclibc/usr/lib/../lib{{/|\\\\}}crti.o"
+// CHECK-BE-UC-HF-32R2: "[[TC]]/uclibc{{/|\\\\}}crtbegin.o"
+// CHECK-BE-UC-HF-32R2: "-L[[TC]]/uclibc"
+// 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:   | 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-SF-32R2: "[[TC]]/../../../../sysroot/sof/usr/lib/../lib{{/|\\\\}}crti.o"
 // CHECK-BE-SF-32R2: "[[TC]]/sof{{/|\\\\}}crtbegin.o"
 // CHECK-BE-SF-32R2: "-L[[TC]]/sof"
 // 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:   | 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: "[[TC]]/include"
+// CHECK-BE-UC-SF-32R2: "-internal-externc-isystem"
+// CHECK-BE-UC-SF-32R2: "[[TC]]/../../../../sysroot/uclibc/usr/include"
+// CHECK-BE-UC-SF-32R2: "{{.*}}ld{{(.exe)?}}"
+// CHECK-BE-UC-SF-32R2: "--sysroot=[[TC]]/../../../../sysroot/uclibc/sof"
+// CHECK-BE-UC-SF-32R2: "-dynamic-linker" "/lib/ld-uClibc.so.0"
+// CHECK-BE-UC-SF-32R2: "[[TC]]/../../../../sysroot/uclibc/sof/usr/lib/../lib{{/|\\\\}}crt1.o"
+// CHECK-BE-UC-SF-32R2: "[[TC]]/../../../../sysroot/uclibc/sof/usr/lib/../lib{{/|\\\\}}crti.o"
+// CHECK-BE-UC-SF-32R2: "[[TC]]/uclibc/sof{{/|\\\\}}crtbegin.o"
+// CHECK-BE-UC-SF-32R2: "-L[[TC]]/uclibc/sof"
+// 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:   | 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-NAN-32R2: "[[TC]]/../../../../sysroot/nan2008/usr/lib/../lib{{/|\\\\}}crti.o"
 // CHECK-BE-NAN-32R2: "[[TC]]/nan2008{{/|\\\\}}crtbegin.o"
 // CHECK-BE-NAN-32R2: "-L[[TC]]/nan2008"
 // 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:   | 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: "[[TC]]/include"
+// CHECK-BE-UC-NAN-32R2: "-internal-externc-isystem"
+// CHECK-BE-UC-NAN-32R2: "[[TC]]/../../../../sysroot/uclibc/usr/include"
+// CHECK-BE-UC-NAN-32R2: "{{.*}}ld{{(.exe)?}}"
+// CHECK-BE-UC-NAN-32R2: "--sysroot=[[TC]]/../../../../sysroot/uclibc/nan2008"
+// CHECK-BE-UC-NAN-32R2: "-dynamic-linker" "/lib/ld-uClibc-mipsn8.so.0"
+// CHECK-BE-UC-NAN-32R2: "[[TC]]/../../../../sysroot/uclibc/nan2008/usr/lib/../lib{{/|\\\\}}crt1.o"
+// CHECK-BE-UC-NAN-32R2: "[[TC]]/../../../../sysroot/uclibc/nan2008/usr/lib/../lib{{/|\\\\}}crti.o"
+// CHECK-BE-UC-NAN-32R2: "[[TC]]/uclibc/nan2008{{/|\\\\}}crtbegin.o"
+// CHECK-BE-UC-NAN-32R2: "-L[[TC]]/uclibc/nan2008"
+// 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:   | 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-EL-HF-32R2: "[[TC]]/../../../../sysroot/el/usr/lib/../lib{{/|\\\\}}crti.o"
 // CHECK-EL-HF-32R2: "[[TC]]/el{{/|\\\\}}crtbegin.o"
 // CHECK-EL-HF-32R2: "-L[[TC]]/el"
 // 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:   | 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: "[[TC]]/include"
+// CHECK-EL-UC-HF-32R2: "-internal-externc-isystem"
+// CHECK-EL-UC-HF-32R2: "[[TC]]/../../../../sysroot/uclibc/usr/include"
+// CHECK-EL-UC-HF-32R2: "{{.*}}ld{{(.exe)?}}"
+// CHECK-EL-UC-HF-32R2: "--sysroot=[[TC]]/../../../../sysroot/uclibc/el"
+// CHECK-EL-UC-HF-32R2: "-dynamic-linker" "/lib/ld-uClibc.so.0"
+// CHECK-EL-UC-HF-32R2: "[[TC]]/../../../../sysroot/uclibc/el/usr/lib/../lib{{/|\\\\}}crt1.o"
+// CHECK-EL-UC-HF-32R2: "[[TC]]/../../../../sysroot/uclibc/el/usr/lib/../lib{{/|\\\\}}crti.o"
+// CHECK-EL-UC-HF-32R2: "[[TC]]/uclibc/el{{/|\\\\}}crtbegin.o"
+// CHECK-EL-UC-HF-32R2: "-L[[TC]]/uclibc/el"
+// 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:   | 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-SF-32R2: "[[TC]]/../../../../sysroot/el/sof/usr/lib/../lib{{/|\\\\}}crti.o"
 // CHECK-EL-SF-32R2: "[[TC]]/el/sof{{/|\\\\}}crtbegin.o"
 // CHECK-EL-SF-32R2: "-L[[TC]]/el/sof"
 // 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:   | 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: "[[TC]]/include"
+// CHECK-EL-UC-SF-32R2: "-internal-externc-isystem"
+// CHECK-EL-UC-SF-32R2: "[[TC]]/../../../../sysroot/uclibc/usr/include"
+// CHECK-EL-UC-SF-32R2: "{{.*}}ld{{(.exe)?}}"
+// CHECK-EL-UC-SF-32R2: "--sysroot=[[TC]]/../../../../sysroot/uclibc/el/sof"
+// CHECK-EL-UC-SF-32R2: "-dynamic-linker" "/lib/ld-uClibc.so.0"
+// CHECK-EL-UC-SF-32R2: "[[TC]]/../../../../sysroot/uclibc/el/sof/usr/lib/../lib{{/|\\\\}}crt1.o"
+// CHECK-EL-UC-SF-32R2: "[[TC]]/../../../../sysroot/uclibc/el/sof/usr/lib/../lib{{/|\\\\}}crti.o"
+// CHECK-EL-UC-SF-32R2: "[[TC]]/uclibc/el/sof{{/|\\\\}}crtbegin.o"
+// CHECK-EL-UC-SF-32R2: "-L[[TC]]/uclibc/el/sof"
+// 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:   | 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-NAN-32R2: "[[TC]]/../../../../sysroot/el/nan2008/usr/lib/../lib{{/|\\\\}}crti.o"
 // CHECK-EL-NAN-32R2: "[[TC]]/el/nan2008{{/|\\\\}}crtbegin.o"
 // CHECK-EL-NAN-32R2: "-L[[TC]]/el/nan2008"
 // 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:   | 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: "[[TC]]/include"
+// CHECK-EL-UC-NAN-32R2: "-internal-externc-isystem"
+// CHECK-EL-UC-NAN-32R2: "[[TC]]/../../../../sysroot/uclibc/usr/include"
+// CHECK-EL-UC-NAN-32R2: "{{.*}}ld{{(.exe)?}}"
+// CHECK-EL-UC-NAN-32R2: "--sysroot=[[TC]]/../../../../sysroot/uclibc/el/nan2008"
+// CHECK-EL-UC-NAN-32R2: "-dynamic-linker" "/lib/ld-uClibc-mipsn8.so.0"
+// CHECK-EL-UC-NAN-32R2: "[[TC]]/../../../../sysroot/uclibc/el/nan2008/usr/lib/../lib{{/|\\\\}}crt1.o"
+// CHECK-EL-UC-NAN-32R2: "[[TC]]/../../../../sysroot/uclibc/el/nan2008/usr/lib/../lib{{/|\\\\}}crti.o"
+// CHECK-EL-UC-NAN-32R2: "[[TC]]/uclibc/el/nan2008{{/|\\\\}}crtbegin.o"
+// CHECK-EL-UC-NAN-32R2: "-L[[TC]]/uclibc/el/nan2008"
+// 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:   | 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"