--- 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