--- zsh-4.3.17/configure.orig Thu Aug 11 11:09:05 2011
+++ zsh-4.3.17/configure Tue Nov 12 15:47:19 2013
@@ -7520,7 +7520,6 @@
else
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
-#define _POSIX_C_SOURCE 200809L
#include <sys/types.h>
#include <signal.h>
int