Merging r143916:

chandlerc · chandlerc · commit de9c697e1a6f · 2011-11-07T10:44:38.000Z
------------------------------------------------------------------------
r143916 | chandlerc | 2011-11-07 01:01:17 -0800 (Mon, 07 Nov 2011) | 4 lines

Fix Linux libc++ usage. Somehow this slipped through during the port.

Test cases for this and all the rest of the port are still in the works,
but will wait for a fixed computer and post 3.0 merging...
------------------------------------------------------------------------

llvm-svn: 143955
diff --git a/clang/lib/Driver/ToolChains.cpp b/clang/lib/Driver/ToolChains.cpp
@@ -2017,6 +2017,14 @@ void Linux::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs,
       DriverArgs.hasArg(options::OPT_nostdincxx))
     return;
 
+  // Check if libc++ has been enabled and provide its include paths if so.
+  if (GetCXXStdlibType(DriverArgs) == ToolChain::CST_Libcxx) {
+    // libc++ is always installed at a fixed path on Linux currently.
+    addSystemInclude(DriverArgs, CC1Args,
+                     getDriver().SysRoot + "/usr/include/c++/v1");
+    return;
+  }
+
   const llvm::Triple &TargetTriple = getTriple();
   const llvm::Triple::ArchType TargetArch = TargetTriple.getArch();
   bool IsTarget64Bit = (TargetArch == llvm::Triple::x86_64 ||
