Specify the SDK version when running vcvarsall.bat

build/toolchain/win/setup_toolchain.py

 # Copyright (c) 2013 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.
 #
 # Copies the given "win tool" (which the toolchain uses to wrap compiler
 # invocations) and the environment blocks for the 32-bit and 64-bit builds on
 # Windows to the build directory.
 #
 # The arguments are the visual studio install location and the location of the
 # win tool. The script assumes that the root build directory is the current dir
@@ skipping 121 matching lines @@
       # variable.
       if 'VSINSTALLDIR' in os.environ:
         del os.environ['VSINSTALLDIR']
       other_path = os.path.normpath(os.path.join(
                                         os.environ['GYP_MSVS_OVERRIDE_PATH'],
                                         'VC/Auxiliary/Build/vcvarsall.bat'))
       if not os.path.exists(other_path):
         raise Exception('%s is missing - make sure VC++ tools are installed.' %
                         script_path)
       script_path = other_path
-    args = [script_path, 'amd64_x86' if cpu == 'x86' else 'amd64']
+    # Chromium requires the 10.0.14393.0 SDK. Previous versions don't have all
+    # of the required declarations, and 10.0.15063.0 is buggy.
+    args = [script_path, 'amd64_x86' if cpu == 'x86' else 'amd64',
+            '10.0.14393.0']
     variables = _LoadEnvFromBat(args)

[scottmg, 2017/04/11 21:23:19]

I don't think this works on VS2015, there was no SDK arg then?

[brucedawson, 2017/04/11 21:40:59]

I tested it on VS 2015. It works fine. It also works on 2017, although I did not
test that as extensively.

What VS 2013 branches? I don't see any references to 2013, or 12.0 or 14.0.

   return _ExtractImportantEnvironment(variables)
 
 
 def _FormatAsEnvironmentBlock(envvar_dict):
   """Format as an 'environment block' directly suitable for CreateProcess.
   Briefly this is a list of key=value\0, terminated by an additional \0. See
   CreateProcess documentation for more details."""
   block = ''
   nul = '\0'
   for key, value in envvar_dict.iteritems():
@@ skipping 51 matching lines @@
 
   assert vc_bin_dir
   print 'vc_bin_dir = ' + gn_helpers.ToGNString(vc_bin_dir)
   assert include_I
   print 'include_flags_I = ' + gn_helpers.ToGNString(include_I)
   assert include_imsvc
   print 'include_flags_imsvc = ' + gn_helpers.ToGNString(include_imsvc)
 
 if __name__ == '__main__':
   main()