Adding a special toolchain that will work with chromeos.

build/download_nacl_toolchains.py

 #!/usr/bin/python
 # Copyright (c) 2011 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Shim to run nacl toolchain download script only if there is a nacl dir."""
 
 import os
 import sys
 
 
 def Main():
+  # Handle chromeos=1 specially (until its building its own toolchain).

[noelallen_use_chromium, 2011/08/26 21:05:35]

Wow, that is one ugly hack.  :(

I assume the real problem here is that download_toolchains.Main does not take
argv and instead uses sys.argv?  Maybe we should change that (as well as the
main here).

+  if 'chromeos=1' in os.environ.get('GYP_DEFINES', ''):
+    sys.argv = [
+      sys.argv[0],
+      '--nacl-newlib-only',
+      '--file-hash', 'linux_x86_newlib',
+           '8337d5ec327d857a49b500723ec9b792f4973abc',
+      '--base-url', ('https://commondatastorage.googleapis.com/'
+                     'nativeclient-archive2/special_chromeos'),
+      '--x86-version', '6561',
+    ]
   script_dir = os.path.dirname(os.path.abspath(__file__))
   src_dir = os.path.dirname(script_dir)
   nacl_dir = os.path.join(src_dir, 'native_client')
   nacl_build_dir = os.path.join(nacl_dir, 'build')
   download_script = os.path.join(nacl_build_dir, 'download_toolchains.py')
   if not os.path.exists(download_script):
     print "Can't find '%s'" % download_script
     print 'Presumably you are intentionally building without NativeClient.'
     print 'Skipping NativeClient toolchain download.'
     sys.exit(0)
   sys.path.insert(0, nacl_build_dir)
   import download_toolchains
   download_toolchains.Main()
 
 
 if __name__ == '__main__':
   Main()