Description: Fix defaults to use correct CPU and FPU on armhf
  Clang was defaulting to a rediculously low CPU on armhf, furthermore when
  The correct CPU is selected it defaults to incorrect FPU options for 
  debian. This patch sets the defaults to appropriate values.
Author: Peter Michael Green <plugwash@raspbian.org>
Bug-Debian: http://bugs.debian.org/704111

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Index: llvm-toolchain-snapshot_3.4~svn183420/clang/lib/Driver/Tools.cpp
===================================================================
--- llvm-toolchain-snapshot_3.4~svn183420.orig/clang/lib/Driver/Tools.cpp	2013-06-06 18:37:04.000000000 +0200
+++ llvm-toolchain-snapshot_3.4~svn183420/clang/lib/Driver/Tools.cpp	2013-06-06 18:37:15.000000000 +0200
@@ -490,6 +490,9 @@
   if (Arg *A = Args.getLastArg(options::OPT_march_EQ)) {
     // Otherwise, if we have -march= choose the base CPU for that arch.
     MArch = A->getValue();
+  } else if (Triple.getEnvironment() == llvm::Triple::GNUEABIHF) {
+    // Use armv6 for armhf (raspbian version of patch)
+    MArch = "armv7-a";
   } else {
     // Otherwise, use the Arch from the triple.
     MArch = Triple.getArchName();
@@ -783,8 +786,19 @@
   }
 
   // Honor -mfpu=.
-  if (const Arg *A = Args.getLastArg(options::OPT_mfpu_EQ))
+  if (const Arg *A = Args.getLastArg(options::OPT_mfpu_EQ)) {
     addFPUArgs(D, A, Args, CmdArgs);
+  } else {
+    if (StringRef(CPUName).startswith("cortex-a")) {
+      //Debian armhf uses vfpv3-d16 
+      CmdArgs.push_back("-target-feature");
+      CmdArgs.push_back("+vfp3");
+      CmdArgs.push_back("-target-feature");
+      CmdArgs.push_back("+d16");
+      CmdArgs.push_back("-target-feature");
+      CmdArgs.push_back("-neon");
+    }
+  }
 
   // Honor -mfpmath=.
   if (const Arg *A = Args.getLastArg(options::OPT_mfpmath_EQ))