Changelog and comment for #616. Fixes #616. Fixes #381.

changelog.rst

@@ -79,6 +79,9 @@ Unreleased
   (The same thing could happen under Python 2 if a ``threading.RLock``
   was held around the monkey-patching call; this is less likely but
   not impossible with import hooks.)
+- Fix configuring c-ares for a 32-bit Python when running on a 64-bit
+  platform. Reported in :issue:`381` and fixed in :pr:`616` by Chris
+  Lane.
 
 1.1a2 (Jul 8, 2015)
 ===================

setup.py

+#!/usr/bin/env python
+"""gevent build & installation script"""
 from __future__ import print_function
 import sys
 import os
@@ -67,6 +69,7 @@ libev_configure_command = ' '.join(["(cd ", _quoted_abspath('libev/'),
                                     " && mv config.h \"$OLDPWD\")",
                                     '> configure-output.txt'])
 
+# See #616, trouble building for a 32-bit python against a 64-bit platform
 _config_vars = distutils.sysconfig.get_config_var("CFLAGS")
 if _config_vars and "m32" in _config_vars:
     _m32 = 'CFLAGS="' + os.getenv('CFLAGS', '') + ' -m32"'