Fix limits.h for linux, as glibc does a #include_next unless
_GCC_LIMITS_H_ is defined, when __GNUC__ is defined.
Also, we need to stay away from possible conflicts with header guards.
We should use CLANG_ to prefix all header guards.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64408 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Preprocessor/clang_headers.c b/test/Preprocessor/clang_headers.c
new file mode 100644
index 0000000..4fa6153
--- /dev/null
+++ b/test/Preprocessor/clang_headers.c
@@ -0,0 +1,3 @@
+// RUN: clang -E %s
+
+#include <limits.h>