WIFCONTINUED/WCONTINUED needs _XOPEN_SOURCE on Linux

Vladimir Kotal · Vladimir Kotal · commit 528075dbd439 · 2020-11-06T16:35:47.000+01:00
diff --git a/wait/wait.c b/wait/wait.c
@@ -32,6 +32,9 @@
  *
  * (c) jp@devnull.cz
  */
+
+#define	_XOPEN_SOURCE	700
+
 #include <assert.h>
 #include <err.h>
 #include <errno.h>
