Index: llvm-toolchain-3.4-3.4~+rc2/clang/lib/Driver/ToolChains.h
===================================================================
--- llvm-toolchain-3.4-3.4~+rc2.orig/clang/lib/Driver/ToolChains.h	2013-11-17 23:36:07.000000000 +0100
+++ llvm-toolchain-3.4-3.4~+rc2/clang/lib/Driver/ToolChains.h	2013-12-05 09:07:45.000000000 +0100
@@ -164,6 +164,8 @@
   virtual bool isPICDefault() const;
   virtual bool isPIEDefault() const;
   virtual bool isPICDefaultForced() const;
+  virtual void AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs,
+                                        llvm::opt::ArgStringList &CC1Args) const;
 
 protected:
   virtual Tool *getTool(Action::ActionClass AC) const;
Index: llvm-toolchain-3.4-3.4~+rc2/clang/lib/Driver/ToolChains.cpp
===================================================================
--- llvm-toolchain-3.4-3.4~+rc2.orig/clang/lib/Driver/ToolChains.cpp	2013-12-02 11:00:07.000000000 +0100
+++ llvm-toolchain-3.4-3.4~+rc2/clang/lib/Driver/ToolChains.cpp	2013-12-05 09:08:49.000000000 +0100
@@ -973,6 +973,13 @@
   return GoodVersion;
 }
 
+void Generic_GCC::AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs,
+                                      llvm::opt::ArgStringList &CC1Args) const {
+  // Under Debian, clang headers are installed into
+  // '/usr/include/clang/VERSION/include/'
+  addSystemInclude(DriverArgs, CC1Args, "/usr/include/clang/" + std::string(CLANG_VERSION_STRING) + "/include/");
+}
+
 /// \brief Less-than for GCCVersion, implementing a Strict Weak Ordering.
 bool Generic_GCC::GCCVersion::isOlderThan(int RHSMajor, int RHSMinor,
                                           int RHSPatch,
Index: llvm-toolchain-3.4-3.4~+rc2/lldb/source/Host/common/Host.cpp
===================================================================
--- llvm-toolchain-3.4-3.4~+rc2.orig/lldb/source/Host/common/Host.cpp	2013-12-05 09:08:49.000000000 +0100
+++ llvm-toolchain-3.4-3.4~+rc2/lldb/source/Host/common/Host.cpp	2013-12-05 09:09:17.294953434 +0100
@@ -1546,7 +1546,7 @@
     return error;
 }
 
-#if defined(__linux__) or defined(__FreeBSD__)
+#if defined(__linux__) || defined(__FreeBSD__) || defined(__GLIBC__)
 // The functions below implement process launching via posix_spawn() for Linux
 // and FreeBSD.