Unset GREP_OPTIONS when extracting processor count

runtime/tools/utils.py

 # Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 # This file contains a set of utilities functions used by other Python-based
 # scripts.
 
 import commands
 import os
 import platform
@@ skipping 36 matching lines @@
     return 'ia32'
   elif id == 'i86pc':
     return 'ia32'
   else:
     return None
 
 
 # Try to guess the number of cpus on this machine.
 def GuessCpus():
   if os.path.exists("/proc/cpuinfo"):
-    return int(commands.getoutput("grep -E '^processor' /proc/cpuinfo | wc -l"))
+    return int(commands.getoutput("GREP_OPTIONS= grep -E '^processor' /proc/cpuinfo | wc -l"))
   if os.path.exists("/usr/bin/hostinfo"):
-    return int(commands.getoutput('/usr/bin/hostinfo | grep "processors are logically available." | awk "{ print \$1 }"'))
+    return int(commands.getoutput('/usr/bin/hostinfo | GREP_OPTIONS= grep "processors are logically available." | awk "{ print \$1 }"'))
   win_cpu_count = os.getenv("NUMBER_OF_PROCESSORS")
   if win_cpu_count:
     return int(win_cpu_count)
   return int(os.getenv("DART_NUMBER_OF_CORES", 2))
 
 
 # Returns true if we're running under Windows.
 def IsWindows():
   return GuessOS() == 'win32'
 
@@ skipping 185 matching lines @@
   print "IsWindows() -> ", IsWindows()
 
 
 class Error(Exception):
   pass
 
 
 if __name__ == "__main__":
   import sys
   Main(sys.argv)