win: x86 targets XP subsystem

test/win/gyptest-link-subsystem.py

 #!/usr/bin/env python
 
 # Copyright (c) 2012 Google Inc. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """
 Make sure subsystem setting is extracted properly.
 """
 
 import TestGyp
 
 import sys
 
 if sys.platform == 'win32':
   test = TestGyp.TestGyp(formats=['msvs', 'ninja'])
 
   CHDIR = 'linker-flags'
   test.run_gyp('subsystem.gyp', chdir=CHDIR)
 
   test.build('subsystem.gyp', 'test_console_ok', chdir=CHDIR)
   test.build('subsystem.gyp', 'test_console_fail', chdir=CHDIR, status=1)
   test.build('subsystem.gyp', 'test_windows_ok', chdir=CHDIR)
   test.build('subsystem.gyp', 'test_windows_fail', chdir=CHDIR, status=1)
 
+  # Make sure we are targeting XP.
+  def GetHeaders(exe):
+    return test.run_dumpbin('/headers', test.built_file_path(exe, chdir=CHDIR))
+  if '5.01 subsystem version' not in GetHeaders('test_console_ok.exe'):
+    test.fail_test()
+  if '5.01 subsystem version' not in GetHeaders('test_windows_ok.exe'):
+    test.fail_test()
+
   # TODO(scottmg): There are other subsystems (WinCE, etc.) that we don't use.
 
   test.pass_test()