diff --git a/clang/lib/Headers/ppc_wrappers/mm_malloc.h b/clang/lib/Headers/ppc_wrappers/mm_malloc.h
--- a/clang/lib/Headers/ppc_wrappers/mm_malloc.h
+++ b/clang/lib/Headers/ppc_wrappers/mm_malloc.h
@@ -19,7 +19,11 @@
 #ifndef __cplusplus
 extern int posix_memalign (void **, size_t, size_t);
 #else
+#if defined(__linux__)
 extern "C" int posix_memalign (void **, size_t, size_t) throw ();
+#elif defined(__FreeBSD__)
+extern "C" int posix_memalign (void **, size_t, size_t);
+#endif
 #endif
 
 static __inline void *