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-rw-r--r--gcc/ada/socket.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/gcc/ada/socket.c b/gcc/ada/socket.c
index 94538d4..6ca9d50 100644
--- a/gcc/ada/socket.c
+++ b/gcc/ada/socket.c
@@ -34,7 +34,9 @@
#define ATTRIBUTE_UNUSED __attribute__((unused))
/* Ensure access to errno is thread safe. */
+#ifndef _REENTRANT
#define _REENTRANT
+#endif
#define _THREAD_SAFE
#include "gsocket.h"