Change SDK builder bot to use sysroots when compiling

tools/bots/dart_sdk.py

 #!/usr/bin/env python
 #
 # Copyright (c) 2015, 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 os
 import os.path
 import shutil
 import sys
 import subprocess
 
 import bot
 import bot_utils
 
 utils = bot_utils.GetUtils()
 
 BUILD_OS = utils.GuessOS()
 
 (bot_name, _) = bot.GetBotName()
 CHANNEL = bot_utils.GetChannelFromName(bot_name)
 
 def BuildSDK():
   with bot.BuildStep('Build SDK'):
+    sysroot_env =  dict(os.environ)
+    ia32root = os.path.join(bot_utils.DART_DIR, 'sysroots', 'build', 'linux',
+                            'debian_wheezy_i386-sysroot')
+    sysroot_env['CXXFLAGS'] = ("--sysroot=%s -I=/usr/include/c++/4.6 "
+             "-I=/usr/include/c++/4.6/i486-linux-gnu") % ia32root
+    sysroot_env['LDFLAGS'] = '--sysroot=%s' % ia32root
+    sysroot_env['CFLAGS'] = '--sysroot=%s' % ia32root
     Run([sys.executable, './tools/build.py', '--mode=release',
-         '--arch=ia32,x64', 'create_sdk'])
+         '--arch=ia32', 'create_sdk'], env=sysroot)

[Bill Hesse, 2016/08/10 15:34:06]

This should have been env=sysroot_env

+
+    x64root = os.path.join(bot_utils.DART_DIR, 'sysroots', 'build', 'linux',
+                            'debian_wheezy_amd64-sysroot')
+    sysroot_env['CXXFLAGS'] = ("--sysroot=%s -I=/usr/include/c++/4.6 "
+            "-I=/usr/include/c++/4.6/x86_64-linux-gnu") % x64root
+    sysroot_env['LDFLAGS'] = '--sysroot=%s' % x64root
+    sysroot_env['CFLAGS'] = '--sysroot=%s' % x64root
+    Run([sys.executable, './tools/build.py', '--mode=release',
+         '--arch=x64', 'create_sdk'], env=sysroot)
 
 def BuildDartdocAPIDocs(dirname):
   dart_sdk = os.path.join(bot_utils.DART_DIR,
                           utils.GetBuildRoot(BUILD_OS, 'release', 'ia32'),
                           'dart-sdk')
   dart_exe =  os.path.join(dart_sdk, 'bin', 'dart')
   dartdoc_dart = os.path.join(bot_utils.DART_DIR,
                               'third_party', 'pkg' , 'dartdoc' , 'bin' , 
                               'dartdoc.dart')
   packages_dir = os.path.join(bot_utils.DART_DIR,
@@ skipping 171 matching lines @@
     assert '/' in remote_path and not remote_path.endswith('/')
 
     mangled_filename = remote_path[remote_path.rfind('/') + 1:]
     local_md5sum = bot_utils.CreateMD5ChecksumFile(local_path,
                                                    mangled_filename)
     gsutil.upload(local_md5sum, remote_path + '.md5sum', public=True)
     local_sha256 = bot_utils.CreateSha256ChecksumFile(local_path,
                                                       mangled_filename)
     gsutil.upload(local_sha256, remote_path + '.sha256sum', public=True)
 
-def Run(command):
+def Run(command, env=None):
   print "Running %s" % ' '.join(command)
-  return bot.RunProcess(command)
+  return bot.RunProcess(command, env=env)
 
 if __name__ == '__main__':
   # We always clobber the bot, to make sure releases are build from scratch
   force = CHANNEL != bot_utils.Channel.BLEEDING_EDGE
   bot.Clobber(force=force)
 
   CreateUploadSDK()
   if BUILD_OS == 'linux':
     CreateUploadVersionFile()
     CreateUploadAPIDocs()