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-rw-r--r--winsup/cygwin/include/sys/cdefs.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/winsup/cygwin/include/sys/cdefs.h b/winsup/cygwin/include/sys/cdefs.h
index 57bf89bef..75b30b218 100644
--- a/winsup/cygwin/include/sys/cdefs.h
+++ b/winsup/cygwin/include/sys/cdefs.h
@@ -18,5 +18,7 @@ details. */
#define __END_DECLS
#endif
#define __P(protos) protos /* full-blown ANSI C */
+#define __CONCAT(__x,__y) __x##__y
+#define __CONCAT(__x,__y) __x##__y
#endif