1 files changed, 76 insertions, 0 deletions
diff --git a/media/webrtc/trunk/build/compiler_version.py b/media/webrtc/trunk/build/compiler_version.py
new file mode 100755
index 000000000..eae7b176d
--- /dev/null
+++ b/media/webrtc/trunk/build/compiler_version.py
@@ -0,0 +1,76 @@
+#!/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.
+
+"""Compiler version checking tool for gcc
+
+Print gcc version as XY if you are running gcc X.Y.*.
+This is used to tweak build flags for gcc 4.4.
+"""
+
+import os
+import re
+import subprocess
+import sys
+
+def GetVersion(compiler):
+  try:
+    # Note that compiler could be something tricky like "distcc g++".
+    compiler = compiler + " -dumpversion"
+    pipe = subprocess.Popen(compiler, shell=True,
+                            stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    gcc_output, gcc_error = pipe.communicate()
+    if pipe.returncode:
+      raise subprocess.CalledProcessError(pipe.returncode, compiler)
+
+    result = re.match(r"(\d+)\.(\d+)", gcc_output)
+    return result.group(1) + result.group(2)
+  except Exception, e:
+    if gcc_error:
+      sys.stderr.write(gcc_error)
+    print >> sys.stderr, "compiler_version.py failed to execute:", compiler
+    print >> sys.stderr, e
+    return ""
+
+def GetVersionFromEnvironment(compiler_env):
+  """ Returns the version of compiler
+
+  If the compiler was set by the given environment variable and exists,
+  return its version, otherwise None is returned.
+  """
+  cxx = os.getenv(compiler_env, None)
+  if cxx:
+    cxx_version = GetVersion(cxx)
+    if cxx_version != "":
+      return cxx_version
+  return None
+
+def main():
+  # Check if CXX_target or CXX environment variable exists an if it does use
+  # that compiler.
+  # TODO: Fix ninja (see http://crbug.com/140900) instead and remove this code
+  # In ninja's cross compile mode, the CXX_target is target compiler, while
+  # the CXX is host. The CXX_target needs be checked first, though the target
+  # and host compiler have different version, there seems no issue to use the
+  # target compiler's version number as gcc_version in Android.
+  cxx_version = GetVersionFromEnvironment("CXX_target")
+  if cxx_version:
+    print cxx_version
+    return 0
+
+  cxx_version = GetVersionFromEnvironment("CXX")
+  if cxx_version:
+    print cxx_version
+    return 0
+
+  # Otherwise we check the g++ version.
+  gccversion = GetVersion("g++")
+  if gccversion != "":
+    print gccversion
+    return 0
+
+  return 1
+
+if __name__ == "__main__":
+  sys.exit(main())