Index: llvm-3.2.src/clang/lib/Driver/ToolChains.cpp
===================================================================
--- llvm-3.2.src.orig/clang/lib/Driver/ToolChains.cpp	2012-12-16 16:59:27.000000000 +0100
+++ llvm-3.2.src/clang/lib/Driver/ToolChains.cpp	2013-01-12 15:33:39.427064577 +0100
@@ -2237,6 +2237,11 @@
     addSystemInclude(DriverArgs, CC1Args, P.str());
   }
 
+  // Under Debian, clang headers are installed into
+  // '/usr/include/clang/VERSION/include/'
+  addSystemInclude(DriverArgs, CC1Args, "/usr/include/clang/" + std::string(CLANG_VERSION_STRING) + "/include/");
+  
+
   if (DriverArgs.hasArg(options::OPT_nostdlibinc))
     return;