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-rw-r--r--gcc/toplev.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/gcc/toplev.c b/gcc/toplev.c
index 287e26b..bb8e48c 100644
--- a/gcc/toplev.c
+++ b/gcc/toplev.c
@@ -742,6 +742,8 @@ char *lang_options[] =
"-Wno-traditional",
"-Wtrigraphs",
"-Wno-trigraphs",
+ "-Wundef",
+ "-Wno-undef",
"-Wwrite-strings",
"-Wno-write-strings",