Linux: add a tool and code to make use_system_ffmpeg option more compatible

This introduces a compile-time detection of ffmpeg configuration
(which codecs are available).

See https://groups.google.com/a/chromium.org/d/msg/chromium-dev/fm5Oe_AC3Sc/qkbmC7txaSkJ
for more context.

No functional change for Google Chrome.

BUG=none

Review URL: https://codereview.chromium.org/12302029

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@183463 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 57 insertions, 0 deletions

diff --git a/tools/compile_test/compile_test.py b/tools/compile_test/compile_test.py
new file mode 100755
index 0000000..a52c072
--- /dev/null
+++ b/tools/compile_test/compile_test.py
@@ -0,0 +1,57 @@
+#!/usr/bin/env python
+# 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.
+
+"""
+Tries to compile given code, produces different output depending on success.
+
+This is similar to checks done by ./configure scripts.
+"""
+
+
+import optparse
+import os
+import shutil
+import subprocess
+import sys
+import tempfile
+
+
+def DoMain(argv):
+  parser = optparse.OptionParser()
+  parser.add_option('--code')
+  parser.add_option('--on-success', default='')
+  parser.add_option('--on-failure', default='')
+
+  options, args = parser.parse_args(argv)
+
+  if not options.code:
+    parser.error('Missing required --code switch.')
+
+  cxx = os.environ.get('CXX', 'g++')
+
+  tmpdir = tempfile.mkdtemp()
+  try:
+    cxx_path = os.path.join(tmpdir, 'test.cc')
+    with open(cxx_path, 'w') as f:
+      f.write(options.code.decode('string-escape'))
+
+    o_path = os.path.join(tmpdir, 'test.o')
+
+    cxx_popen = subprocess.Popen([cxx, cxx_path, '-o', o_path, '-c'],
+                                 stdout=subprocess.PIPE,
+                                 stderr=subprocess.PIPE)
+    cxx_stdout, cxx_stderr = cxx_popen.communicate()
+    if cxx_popen.returncode == 0:
+      print options.on_success
+    else:
+      print options.on_failure
+  finally:
+    shutil.rmtree(tmpdir)
+
+  return 0
+
+
+if __name__ == '__main__':
+  sys.exit(DoMain(sys.argv[1:]))