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-rw-r--r--contrib/gcc/cppinit.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/contrib/gcc/cppinit.c b/contrib/gcc/cppinit.c
index 3b0175f..d8b1dab 100644
--- a/contrib/gcc/cppinit.c
+++ b/contrib/gcc/cppinit.c
@@ -532,6 +532,7 @@ cpp_create_reader (lang)
CPP_OPTION (pfile, operator_names) = 1;
CPP_OPTION (pfile, warn_endif_labels) = 1;
CPP_OPTION (pfile, warn_long_long) = !CPP_OPTION (pfile, c99);
+ CPP_OPTION (pfile, warn_system_headers) = 1;
CPP_OPTION (pfile, pending) =
(struct cpp_pending *) xcalloc (1, sizeof (struct cpp_pending));
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