clang on windows support

1) Run python bin/fetch-clang-win
2) Set clang_win = "../bin/clang_win"
3) ???
4) Profit

Most changes here are to pass the right -mfoo flags to Clang
to enable advanced instruction sets, or fixed warning-as-errors.

BUG=skia:2679

Change-Id: Ieed145d35c209131c7c16fdd3ee11a3de4a1a921
Reviewed-on: https://skia-review.googlesource.com/28740
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>

1 files changed, 40 insertions, 0 deletions

diff --git a/bin/fetch-clang-win b/bin/fetch-clang-win
new file mode 100644
index 0000000000..06ff07b12c
--- /dev/null
+++ b/bin/fetch-clang-win
@@ -0,0 +1,40 @@
+#!/usr/bin/env python
+
+# Copyright 2017 Google Inc.
+#
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+VERSION = '308728-3'
+MD5     = '8bec8c34da5d256e27638383667489e5'
+
+import hashlib
+import os
+import shutil
+import tarfile
+import urllib2
+
+os.chdir(os.path.dirname(__file__))
+
+if (not os.path.exists('clang_win/md5.txt')
+        or open('clang_win/md5.txt').read().strip() != MD5):
+
+  # Clear out everything and start fresh.
+  shutil.rmtree('clang_win', ignore_errors=True)
+  os.mkdir('clang_win')
+  os.chdir('clang_win')
+
+  # Grab the current Clang package.
+  with open(VERSION + '.tgz', 'wb') as tgz:
+    url = 'https://commondatastorage.googleapis.com/chromium-browser-clang'
+    tgz.write(urllib2.urlopen(url + '/Win/clang-' + VERSION + '.tgz').read())
+
+  # Extract it.
+  tarfile.open(VERSION + '.tgz').extractall()
+
+  # Write out its hash to md5.txt so that next time is quicker.
+  h = hashlib.md5()
+  with open(VERSION + '.tgz', 'rb') as tgz:
+    h.update(tgz.read())
+  with open('md5.txt', 'w') as md5:
+    md5.write(h.hexdigest())