Index: include/clang/Driver/Options.td
===================================================================
--- include/clang/Driver/Options.td
+++ include/clang/Driver/Options.td
@@ -2138,6 +2138,7 @@
 def nostdincxx : Flag<["-"], "nostdinc++">, Flags<[CC1Option]>,
   HelpText<"Disable standard #include directories for the C++ standard library">;
 def nostdlib : Flag<["-"], "nostdlib">;
+def nostdlibxx : Flag<["-"], "nostdlib++">;
 def object : Flag<["-"], "object">;
 def o : JoinedOrSeparate<["-"], "o">, Flags<[DriverOption, RenderAsInput, CC1Option, CC1AsOption]>,
   HelpText<"Write output to <file>">, MetaVarName<"<file>">;
Index: include/clang/Driver/ToolChain.h
===================================================================
--- include/clang/Driver/ToolChain.h
+++ include/clang/Driver/ToolChain.h
@@ -432,6 +432,10 @@
   AddClangCXXStdlibIncludeArgs(const llvm::opt::ArgList &DriverArgs,
                                llvm::opt::ArgStringList &CC1Args) const;
 
+  /// Returns if the C++ standard library should be linked in.
+  /// Note that e.g. -lm should still be linked even if this returns false.
+  bool ShouldLinkCXXStdlib(const llvm::opt::ArgList &Args) const;
+
   /// AddCXXStdlibLibArgs - Add the system specific linker arguments to use
   /// for the given C++ standard library type.
   virtual void AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args,
Index: lib/Driver/ToolChain.cpp
===================================================================
--- lib/Driver/ToolChain.cpp
+++ lib/Driver/ToolChain.cpp
@@ -648,8 +648,16 @@
   DriverArgs.AddAllArgs(CC1Args, options::OPT_stdlib_EQ);
 }
 
+bool ToolChain::ShouldLinkCXXStdlib(const llvm::opt::ArgList &Args) const {
+  return getDriver().CCCIsCXX() &&
+         !Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs,
+                      options::OPT_nostdlibxx);
+}
+
 void ToolChain::AddCXXStdlibLibArgs(const ArgList &Args,
                                     ArgStringList &CmdArgs) const {
+  assert(!Args.hasArg(options::OPT_nostdlibxx) &&
+         "should not have called this");
   CXXStdlibType Type = GetCXXStdlibType(Args);
 
   switch (Type) {
Index: lib/Driver/ToolChains/Ananas.cpp
===================================================================
--- lib/Driver/ToolChains/Ananas.cpp
+++ lib/Driver/ToolChains/Ananas.cpp
@@ -91,11 +91,10 @@
 
   AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
 
-  if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
-    if (D.CCCIsCXX())
-      ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
+  if (ToolChain.ShouldLinkCXXStdlib(Args))
+    ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
+  if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs))
     CmdArgs.push_back("-lc");
-  }
 
   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
     CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtend.o")));
Index: lib/Driver/ToolChains/BareMetal.cpp
===================================================================
--- lib/Driver/ToolChains/BareMetal.cpp
+++ lib/Driver/ToolChains/BareMetal.cpp
@@ -192,10 +192,9 @@
                             options::OPT_e, options::OPT_s, options::OPT_t,
                             options::OPT_Z_Flag, options::OPT_r});
 
+  if (TC.ShouldLinkCXXStdlib(Args))
+    TC.AddCXXStdlibLibArgs(Args, CmdArgs);
   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
-    if (C.getDriver().CCCIsCXX())
-      TC.AddCXXStdlibLibArgs(Args, CmdArgs);
-
     CmdArgs.push_back("-lc");
     CmdArgs.push_back("-lm");
 
Index: lib/Driver/ToolChains/CloudABI.cpp
===================================================================
--- lib/Driver/ToolChains/CloudABI.cpp
+++ lib/Driver/ToolChains/CloudABI.cpp
@@ -80,9 +80,9 @@
 
   AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
 
+  if (ToolChain.ShouldLinkCXXStdlib(Args))
+    ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
-    if (D.CCCIsCXX())
-      ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
     CmdArgs.push_back("-lc");
     CmdArgs.push_back("-lcompiler_rt");
   }
Index: lib/Driver/ToolChains/CommonArgs.cpp
===================================================================
--- lib/Driver/ToolChains/CommonArgs.cpp
+++ lib/Driver/ToolChains/CommonArgs.cpp
@@ -600,10 +600,12 @@
 static void addLibFuzzerRuntime(const ToolChain &TC,
                                 const ArgList &Args,
                                 ArgStringList &CmdArgs) {
-    StringRef ParentDir = llvm::sys::path::parent_path(TC.getDriver().InstalledDir);
-    SmallString<128> P(ParentDir);
-    llvm::sys::path::append(P, "lib", "libLLVMFuzzer.a");
-    CmdArgs.push_back(Args.MakeArgString(P));
+  StringRef ParentDir =
+      llvm::sys::path::parent_path(TC.getDriver().InstalledDir);
+  SmallString<128> P(ParentDir);
+  llvm::sys::path::append(P, "lib", "libLLVMFuzzer.a");
+  CmdArgs.push_back(Args.MakeArgString(P));
+  if (!Args.hasArg(clang::driver::options::OPT_nostdlibxx))
     TC.AddCXXStdlibLibArgs(Args, CmdArgs);
 }
 
Index: lib/Driver/ToolChains/CrossWindows.cpp
===================================================================
--- lib/Driver/ToolChains/CrossWindows.cpp
+++ lib/Driver/ToolChains/CrossWindows.cpp
@@ -160,8 +160,7 @@
   TC.AddFilePathLibArgs(Args, CmdArgs);
   AddLinkerInputs(TC, Inputs, Args, CmdArgs, JA);
 
-  if (D.CCCIsCXX() && !Args.hasArg(options::OPT_nostdlib) &&
-      !Args.hasArg(options::OPT_nodefaultlibs)) {
+  if (TC.ShouldLinkCXXStdlib(Args)) {
     bool StaticCXX = Args.hasArg(options::OPT_static_libstdcxx) &&
                      !Args.hasArg(options::OPT_static);
     if (StaticCXX)
Index: lib/Driver/ToolChains/Darwin.cpp
===================================================================
--- lib/Driver/ToolChains/Darwin.cpp
+++ lib/Driver/ToolChains/Darwin.cpp
@@ -549,10 +549,9 @@
         Args.MakeArgString(Twine("-threads=") + llvm::to_string(Parallelism)));
   }
 
+  if (getToolChain().ShouldLinkCXXStdlib(Args))
+    getToolChain().AddCXXStdlibLibArgs(Args, CmdArgs);
   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
-    if (getToolChain().getDriver().CCCIsCXX())
-      getToolChain().AddCXXStdlibLibArgs(Args, CmdArgs);
-
     // link_ssp spec is empty.
 
     // Let the tool chain choose which runtime library to link.
Index: lib/Driver/ToolChains/DragonFly.cpp
===================================================================
--- lib/Driver/ToolChains/DragonFly.cpp
+++ lib/Driver/ToolChains/DragonFly.cpp
@@ -127,7 +127,8 @@
     }
 
     if (D.CCCIsCXX()) {
-      getToolChain().AddCXXStdlibLibArgs(Args, CmdArgs);
+      if (getToolChain().ShouldLinkCXXStdlib(Args))
+        getToolChain().AddCXXStdlibLibArgs(Args, CmdArgs);
       CmdArgs.push_back("-lm");
     }
 
Index: lib/Driver/ToolChains/FreeBSD.cpp
===================================================================
--- lib/Driver/ToolChains/FreeBSD.cpp
+++ lib/Driver/ToolChains/FreeBSD.cpp
@@ -240,7 +240,8 @@
   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
     addOpenMPRuntime(CmdArgs, ToolChain, Args);
     if (D.CCCIsCXX()) {
-      ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
+      if (ToolChain.ShouldLinkCXXStdlib(Args))
+        ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
       if (Args.hasArg(options::OPT_pg))
         CmdArgs.push_back("-lm_p");
       else
Index: lib/Driver/ToolChains/Fuchsia.cpp
===================================================================
--- lib/Driver/ToolChains/Fuchsia.cpp
+++ lib/Driver/ToolChains/Fuchsia.cpp
@@ -107,13 +107,15 @@
       CmdArgs.push_back("-Bdynamic");
 
     if (D.CCCIsCXX()) {
-      bool OnlyLibstdcxxStatic = Args.hasArg(options::OPT_static_libstdcxx) &&
-                                 !Args.hasArg(options::OPT_static);
-      if (OnlyLibstdcxxStatic)
-        CmdArgs.push_back("-Bstatic");
-      ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
-      if (OnlyLibstdcxxStatic)
-        CmdArgs.push_back("-Bdynamic");
+      if (ToolChain.ShouldLinkCXXStdlib(Args)) {
+        bool OnlyLibstdcxxStatic = Args.hasArg(options::OPT_static_libstdcxx) &&
+                                   !Args.hasArg(options::OPT_static);
+        if (OnlyLibstdcxxStatic)
+          CmdArgs.push_back("-Bstatic");
+        ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
+        if (OnlyLibstdcxxStatic)
+          CmdArgs.push_back("-Bdynamic");
+      }
       CmdArgs.push_back("-lm");
     }
 
Index: lib/Driver/ToolChains/Gnu.cpp
===================================================================
--- lib/Driver/ToolChains/Gnu.cpp
+++ lib/Driver/ToolChains/Gnu.cpp
@@ -560,13 +560,15 @@
 
   if (D.CCCIsCXX() &&
       !Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
-    bool OnlyLibstdcxxStatic = Args.hasArg(options::OPT_static_libstdcxx) &&
-                               !Args.hasArg(options::OPT_static);
-    if (OnlyLibstdcxxStatic)
-      CmdArgs.push_back("-Bstatic");
-    ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
-    if (OnlyLibstdcxxStatic)
-      CmdArgs.push_back("-Bdynamic");
+    if (ToolChain.ShouldLinkCXXStdlib(Args)) {
+      bool OnlyLibstdcxxStatic = Args.hasArg(options::OPT_static_libstdcxx) &&
+                                 !Args.hasArg(options::OPT_static);
+      if (OnlyLibstdcxxStatic)
+        CmdArgs.push_back("-Bstatic");
+      ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
+      if (OnlyLibstdcxxStatic)
+        CmdArgs.push_back("-Bdynamic");
+    }
     CmdArgs.push_back("-lm");
   }
   // Silence warnings when linking C code with a C++ '-stdlib' argument.
Index: lib/Driver/ToolChains/Hexagon.cpp
===================================================================
--- lib/Driver/ToolChains/Hexagon.cpp
+++ lib/Driver/ToolChains/Hexagon.cpp
@@ -248,7 +248,8 @@
   //----------------------------------------------------------------------------
   if (IncStdLib && IncDefLibs) {
     if (D.CCCIsCXX()) {
-      HTC.AddCXXStdlibLibArgs(Args, CmdArgs);
+      if (HTC.ShouldLinkCXXStdlib(Args))
+        HTC.AddCXXStdlibLibArgs(Args, CmdArgs);
       CmdArgs.push_back("-lm");
     }
 
Index: lib/Driver/ToolChains/MinGW.cpp
===================================================================
--- lib/Driver/ToolChains/MinGW.cpp
+++ lib/Driver/ToolChains/MinGW.cpp
@@ -185,8 +185,7 @@
 
   // TODO: Add profile stuff here
 
-  if (D.CCCIsCXX() &&
-      !Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
+  if (TC.ShouldLinkCXXStdlib(Args)) {
     bool OnlyLibstdcxxStatic = Args.hasArg(options::OPT_static_libstdcxx) &&
                                !Args.hasArg(options::OPT_static);
     if (OnlyLibstdcxxStatic)
Index: lib/Driver/ToolChains/Minix.cpp
===================================================================
--- lib/Driver/ToolChains/Minix.cpp
+++ lib/Driver/ToolChains/Minix.cpp
@@ -72,7 +72,8 @@
 
   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
     if (D.CCCIsCXX()) {
-      getToolChain().AddCXXStdlibLibArgs(Args, CmdArgs);
+      if (getToolChain().ShouldLinkCXXStdlib(Args))
+        getToolChain().AddCXXStdlibLibArgs(Args, CmdArgs);
       CmdArgs.push_back("-lm");
     }
   }
Index: lib/Driver/ToolChains/NaCl.cpp
===================================================================
--- lib/Driver/ToolChains/NaCl.cpp
+++ lib/Driver/ToolChains/NaCl.cpp
@@ -133,13 +133,15 @@
 
   if (D.CCCIsCXX() &&
       !Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
-    bool OnlyLibstdcxxStatic =
-        Args.hasArg(options::OPT_static_libstdcxx) && !IsStatic;
-    if (OnlyLibstdcxxStatic)
-      CmdArgs.push_back("-Bstatic");
-    ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
-    if (OnlyLibstdcxxStatic)
-      CmdArgs.push_back("-Bdynamic");
+    if (ToolChain.ShouldLinkCXXStdlib(Args)) {
+      bool OnlyLibstdcxxStatic =
+          Args.hasArg(options::OPT_static_libstdcxx) && !IsStatic;
+      if (OnlyLibstdcxxStatic)
+        CmdArgs.push_back("-Bstatic");
+      ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
+      if (OnlyLibstdcxxStatic)
+        CmdArgs.push_back("-Bdynamic");
+    }
     CmdArgs.push_back("-lm");
   }
 
Index: lib/Driver/ToolChains/NetBSD.cpp
===================================================================
--- lib/Driver/ToolChains/NetBSD.cpp
+++ lib/Driver/ToolChains/NetBSD.cpp
@@ -278,7 +278,8 @@
   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
     addOpenMPRuntime(CmdArgs, getToolChain(), Args);
     if (D.CCCIsCXX()) {
-      getToolChain().AddCXXStdlibLibArgs(Args, CmdArgs);
+      if (getToolChain().ShouldLinkCXXStdlib(Args))
+        getToolChain().AddCXXStdlibLibArgs(Args, CmdArgs);
       CmdArgs.push_back("-lm");
     }
     if (NeedsSanitizerDeps)
Index: lib/Driver/ToolChains/OpenBSD.cpp
===================================================================
--- lib/Driver/ToolChains/OpenBSD.cpp
+++ lib/Driver/ToolChains/OpenBSD.cpp
@@ -177,7 +177,8 @@
 
   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
     if (D.CCCIsCXX()) {
-      getToolChain().AddCXXStdlibLibArgs(Args, CmdArgs);
+      if (getToolChain().ShouldLinkCXXStdlib(Args))
+        getToolChain().AddCXXStdlibLibArgs(Args, CmdArgs);
       if (Args.hasArg(options::OPT_pg))
         CmdArgs.push_back("-lm_p");
       else
Index: lib/Driver/ToolChains/PS4CPU.cpp
===================================================================
--- lib/Driver/ToolChains/PS4CPU.cpp
+++ lib/Driver/ToolChains/PS4CPU.cpp
@@ -227,7 +227,8 @@
     // libraries for both C and C++ compilations.
     CmdArgs.push_back("-lkernel");
     if (D.CCCIsCXX()) {
-      ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
+      if (ToolChain.ShouldLinkCXXStdlib(Args))
+        ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
       if (Args.hasArg(options::OPT_pg))
         CmdArgs.push_back("-lm_p");
       else
Index: lib/Driver/ToolChains/Solaris.cpp
===================================================================
--- lib/Driver/ToolChains/Solaris.cpp
+++ lib/Driver/ToolChains/Solaris.cpp
@@ -100,7 +100,7 @@
   AddLinkerInputs(getToolChain(), Inputs, Args, CmdArgs, JA);
 
   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
-    if (getToolChain().getDriver().CCCIsCXX())
+    if (getToolChain().ShouldLinkCXXStdlib(Args))
       getToolChain().AddCXXStdlibLibArgs(Args, CmdArgs);
     CmdArgs.push_back("-lgcc_s");
     CmdArgs.push_back("-lc");
Index: lib/Driver/ToolChains/WebAssembly.cpp
===================================================================
--- lib/Driver/ToolChains/WebAssembly.cpp
+++ lib/Driver/ToolChains/WebAssembly.cpp
@@ -38,7 +38,6 @@
                                 const char *LinkingOutput) const {
 
   const ToolChain &ToolChain = getToolChain();
-  const Driver &D = ToolChain.getDriver();
   const char *Linker = Args.MakeArgString(ToolChain.GetLinkerPath());
   ArgStringList CmdArgs;
   CmdArgs.push_back("-flavor");
@@ -77,7 +76,7 @@
   AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
 
   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
-    if (D.CCCIsCXX())
+    if (ToolChain.ShouldLinkCXXStdlib(Args))
       ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
 
     if (Args.hasArg(options::OPT_pthread))
Index: test/Driver/nostdlibxx.cpp
===================================================================
--- test/Driver/nostdlibxx.cpp
+++ test/Driver/nostdlibxx.cpp
@@ -0,0 +1,8 @@
+// RUN: %clangxx -target i686-pc-linux-gnu -### -nostdlib++ %s 2> %t
+// RUN: FileCheck < %t %s
+
+// We should still have -lm and the C standard libraries, but not -lstdc++.
+
+// CHECK-NOT: -lstdc++
+// CHECK-NOT: -lc++
+// CHECK: -lm