diff -Naur clang-3.0.src-orig/lib/Driver/ToolChains.cpp clang-3.0.src/lib/Driver/ToolChains.cpp
--- clang-3.0.src-orig/lib/Driver/ToolChains.cpp	2011-11-17 02:40:32.000000000 -0500
+++ clang-3.0.src/lib/Driver/ToolChains.cpp	2011-12-19 06:29:27.562428830 -0500
@@ -1926,14 +1926,17 @@
   if (DriverArgs.hasArg(options::OPT_nostdinc))
     return;
 
+#if 0
   if (!DriverArgs.hasArg(options::OPT_nostdlibinc))
     addSystemInclude(DriverArgs, CC1Args, D.SysRoot + "/usr/local/include");
 
+#endif
   if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
     llvm::sys::Path P(D.ResourceDir);
     P.appendComponent("include");
     addSystemInclude(DriverArgs, CC1Args, P.str());
   }
+#if 0
 
   if (DriverArgs.hasArg(options::OPT_nostdlibinc))
     return;
@@ -1998,6 +2001,8 @@
     return;
 
   addExternCSystemInclude(DriverArgs, CC1Args, D.SysRoot + "/usr/include");
+#endif
+  addExternCSystemInclude(DriverArgs, CC1Args, D.SysRoot + C_INCLUDE_PATH);
 }
 
 static bool addLibStdCXXIncludePaths(Twine Base, Twine TargetArchDir,
@@ -2030,6 +2035,7 @@
   bool IsTarget64Bit = (TargetArch == llvm::Triple::x86_64 ||
                         TargetArch == llvm::Triple::ppc64);
 
+#if 0
   StringRef CxxIncludeRoot(CXX_INCLUDE_ROOT);
   if (!CxxIncludeRoot.empty()) {
     StringRef CxxIncludeArch(CXX_INCLUDE_ARCH);
@@ -2072,6 +2078,10 @@
                              GCCInstallation.getTriple() + Suffix,
                              DriverArgs, CC1Args);
   }
+#endif
+    addLibStdCXXIncludePaths(CPP_INCLUDE_PATH,
+                             CPP_HOST,
+                             DriverArgs, CC1Args);
 }
 
 /// DragonFly - DragonFly tool chain which can call as(1) and ld(1) directly.