BUG numpy#1100: fix svn version detection for localized environments.

setup.py

@@ -56,10 +56,23 @@
 
 # Return the svn version as a string, raise a ValueError otherwise
 def svn_version():
+    def _minimal_ext_cmd(cmd):
+        # construct minimal environment
+        env = {}
+        path = os.environ.get('PATH')
+        if path is not None:
+            env['PATH'] = path
+        # LANGUAGE is used on win32
+        env['LANGUAGE'] = 'C'
+        env['LANG'] = 'C'
+        env['LC_ALL'] = 'C'
+        out = subprocess.Popen(cmd, stdout = subprocess.PIPE, env=env).communicate()[0]
+        return out
+
     try:
-        out = subprocess.Popen(['svn', 'info'], stdout = subprocess.PIPE).communicate()[0]
+        out = _minimal_ext_cmd(['svn', 'info'])
     except OSError:
-        print " --- Could not run svn info --- "
+        print(" --- Could not run svn info --- ")
         return ""
 
     r = re.compile('Revision: ([0-9]+)')