Merge branch '32bit_build' of https://github.com/lanstin/gevent

setup.py

-#!/usr/bin/env python
-"""gevent build & installation script"""
 from __future__ import print_function
 import sys
 import os
@@ -10,6 +8,10 @@ from os.path import join, abspath, basename, dirname
 from subprocess import check_call
 from glob import glob
 
+import distutils
+import distutils.sysconfig  # to get CFLAGS to pass into c-ares configure script
+
+
 PYPY = hasattr(sys, 'pypy_version_info')
 
 try:
@@ -64,9 +66,16 @@ libev_configure_command = ' '.join(["(cd ", _quoted_abspath('libev/'),
                                     " && /bin/sh ./configure ",
                                     " && mv config.h \"$OLDPWD\")",
                                     '> configure-output.txt'])
+
+_config_vars = distutils.sysconfig.get_config_var("CFLAGS")
+if _config_vars and "m32" in _config_vars:
+    _m32 = 'CFLAGS="' + os.getenv('CFLAGS', '') + ' -m32"'
+else:
+    _m32 = ''
+
 ares_configure_command = ' '.join(["(cd ", _quoted_abspath('c-ares/'),
                                    " && if [ -e ares_build.h ]; then cp ares_build.h ares_build.h.orig; fi ",
-                                   " && /bin/sh ./configure CONFIG_COMMANDS= CONFIG_FILES= ",
+                                   " && /bin/sh ./configure " + _m32 + "CONFIG_COMMANDS= CONFIG_FILES= ",
                                    " && cp ares_config.h ares_build.h \"$OLDPWD\" ",
                                    " && mv ares_build.h.orig ares_build.h)",
                                    "> configure-output.txt"])