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-rw-r--r--source4/lib/replace/libreplace.m46
1 files changed, 6 insertions, 0 deletions
diff --git a/source4/lib/replace/libreplace.m4 b/source4/lib/replace/libreplace.m4
index 519b911de5..ef8087607e 100644
--- a/source4/lib/replace/libreplace.m4
+++ b/source4/lib/replace/libreplace.m4
@@ -18,6 +18,12 @@ AC_C_INLINE
AC_PROG_CC
AC_PROG_INSTALL
+AH_VERBATIM([_XOPEN_SOURCE_EXTENDED],
+[/* Enable XOPEN extensions on systems that have them. */
+#ifndef _XOPEN_SOURCE_EXTENDED
+# define _XOPEN_SOURCE_EXTENDED 1
+#endif])
+
LIBREPLACE_C99_STRUCT_INIT([],[])
AC_SYS_LARGEFILE