Give better error messages for users when trying to run the 64 bit editor on a 32 bit JVM

editor/build/build.py

 #!/usr/bin/env python
 #
 # Copyright (c) 2012, 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.
 
 import glob
 import gsutil
 import imp
 import optparse
@@ skipping 896 matching lines @@
       subprocess.call(['zip', '-q', zipFile, infofile], env=os.environ)
       os.remove(infofile)
 
 
 def Modify64BitDartEditorIni(iniFilePath):
   f = open(iniFilePath, 'r')
   lines = f.readlines()
   f.close()
   lines[lines.index('-Xms40m\n')] = '-Xms256m\n'
   lines[lines.index('-Xmx1000m\n')] = '-Xmx2000m\n'
+  # Add -d64 to give better error messages to user in 64 bit mode.
+  lines[lines.index('-vmargs\n')] = '-vmargs\n-d64\n'
   f = open(iniFilePath, 'w')
   f.writelines(lines);
   f.close()
 
 
 def RunEditorTests(buildout, buildos):
   StartBuildStep('run_tests')
 
   for editorArchive in _GetTestableRcpArchives(buildout):
     with utils.TempDir('editor_') as tempDir:
@@ skipping 334 matching lines @@
   """delete the given file - do not re-throw any exceptions that occur"""
   if os.path.exists(f):
     try:
       os.remove(f)
     except OSError:
       print 'error deleting %s' % f
 
 
 if __name__ == '__main__':
   sys.exit(main())