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-rw-r--r--gcc/system.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/system.h b/gcc/system.h
index de9c5c0..4f9256e 100644
--- a/gcc/system.h
+++ b/gcc/system.h
@@ -747,6 +747,10 @@ extern int vsnprintf (char *, size_t, const char *, va_list);
# include <memory>
#endif
+#ifdef INCLUDE_MUTEX
+# include <mutex>
+#endif
+
#ifdef INCLUDE_MALLOC_H
#if defined(HAVE_MALLINFO) || defined(HAVE_MALLINFO2)
#include <malloc.h>