Allow the libc++ C header wrappers to be included when compiling C.

C99 at least. C89 still fails due to the use of block comments.

NOTE: Having libc++ on the include path when compiling C is not
recommended or ever really supported. However it happens often
enough that this change is warrented.

llvm-svn: 305539

1 files changed, 37 insertions, 0 deletions

diff --git a/libcxx/test/libcxx/include_as_c.sh.cpp b/libcxx/test/libcxx/include_as_c.sh.cpp
new file mode 100644
index 00000000000..db50d835ec1
--- /dev/null
+++ b/libcxx/test/libcxx/include_as_c.sh.cpp
@@ -0,0 +1,37 @@
+// -*- C++ -*-
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// Test that the C wrapper headers can be included when compiling them as C.
+
+// NOTE: It's not common or recommended to have libc++ in the header search
+// path when compiling C files, but it does happen often enough.
+
+// RUN: %cxx -c -xc %s -fsyntax-only %flags %compile_flags -std=c99
+
+#include <complex.h>
+#include <ctype.h>
+#include <errno.h>
+#include <float.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <locale.h>
+#include <math.h>
+#include <setjmp.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <tgmath.h>
+#include <wchar.h>
+#include <wctype.h>
+
+int main() {}