Win-clang update script: make an auxiliary copy of the sanitizer headers

tools/clang/scripts/update.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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.
 
 """Windows can't run .sh files, so this is a Python implementation of
 update.sh. This script should replace update.sh on all platforms eventually."""
 
 import os
 import re
@@ skipping 142 matching lines @@
   if not os.path.exists(asan_rt_lib_dst_dir):
     os.makedirs(asan_rt_lib_dst_dir)
   for root, _, files in os.walk(asan_rt_lib_src_dir):
     for f in files:
       if re.match(r'^.*-i386\.lib$', f):
         CopyFile(os.path.join(root, f), asan_rt_lib_dst_dir)
 
   CopyFile(os.path.join(asan_rt_lib_src_dir, '..', '..', 'asan_blacklist.txt'),
            os.path.join(asan_rt_lib_dst_dir, '..', '..'))
 
+  # Make an extra copy of the sanitizer headers, to be put on the include path
+  # of the fallback compiler.
+  sanitizer_include_dir = os.path.join(LLVM_BUILD_DIR, 'lib', 'clang', '3.5.0',
+                                       'include', 'sanitizer')
+  aux_sanitizer_include_dir = os.path.join(LLVM_BUILD_DIR, 'lib', 'clang',
+                                           '3.5.0', 'include_sanitizer',
+                                           'sanitizer')
+  if not os.path.exists(aux_sanitizer_include_dir):
+    os.makedirs(aux_sanitizer_include_dir)
+  for _, _, files in os.walk(sanitizer_include_dir):
+    for f in files:
+      CopyFile(os.path.join(sanitizer_include_dir, f),
+               aux_sanitizer_include_dir)
+
   WriteStampFile(LLVM_WIN_REVISION)
   print 'Clang update was successful.'
   return 0
 
 
 def main():
   if not sys.platform in ['win32', 'cygwin']:
     # For non-Windows, fall back to update.sh.
     # TODO(hans): Make update.py replace update.sh completely.
 
@@ skipping 16 matching lines @@
 
   if re.search(r'\b(make_clang_dir)=', os.environ.get('GYP_DEFINES', '')):
     print 'Skipping Clang update (make_clang_dir= was set in GYP_DEFINES).'
     return 0
 
   return UpdateClang()
 
 
 if __name__ == '__main__':
   sys.exit(main())