casa-mp-base

--- a/tools/clang/tools/libclang/CIndex.cpp.orig    2012-04-01 22:38:40.000000000 -0700

+++ b/tools/clang/tools/libclang/CIndex.cpp 2012-04-01 22:39:17.000000000 -0700

@@ -5754,7 +5754,7 @@ void SetSafetyThreadStackSize(unsigned V

 void clang::setThreadBackgroundPriority() {

   // FIXME: Move to llvm/Support and make it cross-platform.

-#ifdef __APPLE__

+#if defined(__APPLE__) && defined(PRIO_DARWIN_THREAD) && defined(PRIO_DARWIN_BG)

   setpriority(PRIO_DARWIN_THREAD, 0, PRIO_DARWIN_BG);

 #endif

 }