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-rw-r--r--gcc/gensupport.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/gensupport.c b/gcc/gensupport.c
index dbf0aab6922..8c65a3e7a14 100644
--- a/gcc/gensupport.c
+++ b/gcc/gensupport.c
@@ -906,6 +906,11 @@ init_md_reader_args_cb (int argc, char **argv, bool (*parse_opt)(const char *))
char *lastsl;
rtx desc;
+ /* Unlock the stdio streams. */
+ unlock_stream (stdin);
+ unlock_stream (stdout);
+ unlock_stream (stderr);
+
for (i = 1; i < argc; i++)
{
if (argv[i][0] != '-')