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-rw-r--r--test/Modules/system_headers.m7
1 files changed, 6 insertions, 1 deletions
diff --git a/test/Modules/system_headers.m b/test/Modules/system_headers.m
index 39b13ca..8adc7e8 100644
--- a/test/Modules/system_headers.m
+++ b/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>
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