Various hacks for running a clang tool on Windows.

tools/clang/scripts/update.py

Index: tools/clang/scripts/update.py
diff --git a/tools/clang/scripts/update.py b/tools/clang/scripts/update.py
index 5ee7c309d3478ec858b006e278652750b59b9fcb..5e8f568e390538f95cf862f72dfafbe41b99d513 100755
--- a/tools/clang/scripts/update.py
+++ b/tools/clang/scripts/update.py
@@ -23,6 +23,7 @@ LLVM_WIN_REVISION = 'HEAD'
 if (re.search(r'\b(asan)=1', os.environ.get('GYP_DEFINES', '')) and
     not 'LLVM_FORCE_HEAD_REVISION' in os.environ):
   LLVM_WIN_REVISION = '217738'
+LLVM_WIN_REVISION = '217738'

[dcheng, 2014/11/11 23:36:10]

I temporarily pinned the revision when I was building locally.

 
 # Path constants. (All of these should be absolute paths.)
 THIS_DIR = os.path.abspath(os.path.dirname(__file__))
@@ -71,6 +72,7 @@ def DeleteFiles(dir, pattern):
 
 def ClobberChromiumBuildFiles():
   """Clobber Chomium build files."""
+  return

[dcheng, 2014/11/11 23:36:10]

Rebuilds were getting really long =(

   print 'Clobbering Chromium build files...'
   out_dir = os.path.join(CHROMIUM_DIR, 'out')
   if os.path.isdir(out_dir):
@@ -169,7 +171,7 @@ def UpdateClang():
   print 'Updating Clang to %s...' % (LLVM_WIN_REVISION)
   if LLVM_WIN_REVISION != 'HEAD' and ReadStampFile() == LLVM_WIN_REVISION:
     print 'Already up to date.'
-    return 0
+    # return 0
 
   AddCMakeToPath()
   ClobberChromiumBuildFiles()
@@ -187,9 +189,15 @@ def UpdateClang():
 
   RunCommand(GetVSVersion().SetupScript('x64') +
              ['&&', 'cmake', '-GNinja', '-DCMAKE_BUILD_TYPE=Release',
+              '-DCHROMIUM_TOOLS_SRC=%s' % os.path.join(CHROMIUM_DIR, 'tools', 'clang'),
+              '-DCHROMIUM_TOOLS=rewrite_scoped_refptr',
               '-DLLVM_ENABLE_ASSERTIONS=ON', SubversionCmakeArg(), LLVM_DIR])
   RunCommand(GetVSVersion().SetupScript('x64') + ['&&', 'ninja', 'all'])
 
+  WriteStampFile(LLVM_WIN_REVISION)

[dcheng, 2014/11/11 23:36:10]

The small CMakeLists.txt shim in third_party/llvm/tools made the ASan build
pretty unhappy, so I had to return before.

+  print 'Clang update was successful.'
+  return 0
+
   # Do an x86 build of compiler-rt to get the 32-bit ASan run-time.
   # TODO(hans): Remove once the regular build above produces this.
   if not os.path.exists(COMPILER_RT_BUILD_DIR):