Fix interaction of max_align_t and modules.
When building with modules enabled, we were defining max_align_t as a typedef
for a different anonymous struct type each time it was included, resulting in
an error if <stddef.h> is not covered by a module map and is included more than
once in the same modules-enabled compilation of C11 or C++11 code.
llvm-svn: 218931
diff --git a/clang/test/Modules/system_headers.m b/clang/test/Modules/system_headers.m
index 39b13ca..8adc7e8 100644
--- a/clang/test/Modules/system_headers.m
+++ b/clang/test/Modules/system_headers.m
@@ -1,8 +1,13 @@
// Test that system-headerness works for building modules.
// RUN: rm -rf %t
-// RUN: %clang_cc1 -fmodules -fmodules-cache-path=%t/cache -isystem %S/Inputs -pedantic -Werror %s -verify
+// RUN: %clang_cc1 -fmodules -fmodules-cache-path=%t/cache -isystem %S/Inputs -pedantic -Werror %s -verify -std=c11
// expected-no-diagnostics
@import warning;
int i = bigger_than_int;
+
+#include <stddef.h>
+
+#define __need_size_t
+#include <stddef.h>