Don't define _XOPEN_SOURCE and _POSIX_C_SOURCE on FreeBSD 5.0. Fixes #636318.
diff --git a/pyconfig.h.in b/pyconfig.h.in
index e612494..19a0ab2 100644
--- a/pyconfig.h.in
+++ b/pyconfig.h.in
@@ -790,7 +790,7 @@
this defined. */
#undef _POSIX_1_SOURCE
-/* Define to activate features from IEEE Stds 1003.{123}-1995 */
+/* Define to activate features from IEEE Stds 1003.1-2001 */
#undef _POSIX_C_SOURCE
/* Define to 1 if you need to in order for `stat' and other things to work. */
@@ -802,10 +802,8 @@
/* Define to force use of thread-safe errno, h_errno, and other functions */
#undef _REENTRANT
-/* Define on UNIX to activate XPG/5 features. */
-#ifndef _XOPEN_SOURCE
-# undef _XOPEN_SOURCE
-#endif
+/* Define to the level of X/Open that your system supports */
+#undef _XOPEN_SOURCE
/* Define to activate Unix95-and-earlier features */
#undef _XOPEN_SOURCE_EXTENDED