--- Python-3.6.1rc1/configure.ac	2017-03-12 14:28:34.395001700 -0500
+++ Python-3.6.1rc1/configure.ac	2017-03-21 00:27:44.595584900 -0500
@@ -138,11 +138,6 @@ AC_DEFINE(_GNU_SOURCE, 1, [Define on Lin
 AC_DEFINE(_NETBSD_SOURCE, 1, [Define on NetBSD to activate all library features])
 
 # The later defininition of _XOPEN_SOURCE and _POSIX_C_SOURCE disables
-# certain features on FreeBSD, so we need __BSD_VISIBLE to re-enable
-# them.
-AC_DEFINE(__BSD_VISIBLE, 1, [Define on FreeBSD to activate all library features])
-
-# The later defininition of _XOPEN_SOURCE and _POSIX_C_SOURCE disables
 # certain features on Mac OS X, so we need _DARWIN_C_SOURCE to re-enable
 # them.
 AC_DEFINE(_DARWIN_C_SOURCE, 1, [Define on Darwin to activate all library features])