This really seems like a boring set of fixes to our tests to make them more
independent of the underlying system. Let me know if any of these are too
aggressive.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@119345 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Preprocessor/clang_headers.c b/test/Preprocessor/clang_headers.c
index f2dec4f..41bd754 100644
--- a/test/Preprocessor/clang_headers.c
+++ b/test/Preprocessor/clang_headers.c
@@ -1,3 +1,3 @@
-// RUN: %clang_cc1 -E %s
+// RUN: %clang_cc1 -ffreestanding -E %s
 
 #include <limits.h>