- Enable automatic cross-builds across ARM and MIPS architectures.

tools/utils.py

 # 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.
 
 # This file contains a set of utilities functions used by other Python-based
 # scripts.
 
 import commands
 import os
 import platform
@@ skipping 202 matching lines @@
     gsutil = 'e:\\\\b\\build\\scripts\\slave\\gsutil'
   return gsutil
 
 def GetBuildMode(mode):
   return BUILD_MODES[mode]
 
 def GetBuildConf(mode, arch, conf_os=None):
   if conf_os == 'android':
     return '%s%s%s' % (GetBuildMode(mode), conf_os.title(), arch.upper())
   else:
-    return '%s%s' % (GetBuildMode(mode), arch.upper())
+    # Ask for a cross build if the host and target architectures don't match.
+    host_arch = ARCH_GUESS
+    target_arch = arch
+    if target_arch == 'x64':
+      target_arch = 'ia32'
+    cross_build = ''
+    if host_arch != target_arch:
+      cross_build = 'X'
+    return '%s%s%s' % (GetBuildMode(mode), cross_build, arch.upper())
 
 ARCH_GUESS = GuessArchitecture()
 BASE_DIR = os.path.abspath(os.path.join(os.curdir, '..'))
 DART_DIR = os.path.abspath(os.path.join(__file__, '..', '..'))
 
 
 def GetBuildDir(host_os, target_os):
   return BUILD_ROOT[host_os]
 
 def GetBuildRoot(host_os, mode=None, arch=None, target_os=None):
@@ skipping 300 matching lines @@
     os.chdir(self._working_directory)
 
   def __exit__(self, *_):
     print "Enter directory = ", self._old_cwd
     os.chdir(self._old_cwd)
 
 
 if __name__ == "__main__":
   import sys
   Main(sys.argv)