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-rw-r--r--contrib/gcclibs/libgomp/config/posix/lock.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/contrib/gcclibs/libgomp/config/posix/lock.c b/contrib/gcclibs/libgomp/config/posix/lock.c
index 062174d..59459bb 100644
--- a/contrib/gcclibs/libgomp/config/posix/lock.c
+++ b/contrib/gcclibs/libgomp/config/posix/lock.c
@@ -33,8 +33,12 @@
to do better and streamline the locking as well as reduce the size
of the types exported. */
-/* We need Unix98 extensions to get recursive locks. */
+/* We need Unix98 extensions to get recursive locks. On Tru64 UNIX V4.0F,
+ the declarations are available without _XOPEN_SOURCE, which actually
+ breaks compilation. */
+#ifndef __osf__
#define _XOPEN_SOURCE 500
+#endif
#include "libgomp.h"
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