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-rw-r--r--src/config.in2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/config.in b/src/config.in
index 5683e3e9849..95c9993a75f 100644
--- a/src/config.in
+++ b/src/config.in
@@ -90,7 +90,9 @@ and this notice must be preserved on all copies. */
/* Some things figured out by the configure script, grouped as they are in
configure.in. */
+#ifndef _ALL_SOURCE /* suppress warning if this is pre-defined */
#undef _ALL_SOURCE
+#endif
#undef HAVE_SYS_TIMEB_H
#undef HAVE_SYS_TIME_H
#undef HAVE_UNISTD_H