The Tor Browser: media/webrtc/trunk/build/compiler

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 #!/usr/bin/env python

     2 # Copyright (c) 2012 The Chromium Authors. All rights reserved.

     3 # Use of this source code is governed by a BSD-style license that can be

     4 # found in the LICENSE file.

     6 """Compiler version checking tool for gcc

     8 Print gcc version as XY if you are running gcc X.Y.*.

     9 This is used to tweak build flags for gcc 4.4.

    10 """

    12 import os

    13 import re

    14 import subprocess

    15 import sys

    17 def GetVersion(compiler):

    18   try:

    19     # Note that compiler could be something tricky like "distcc g++".

    20     compiler = compiler + " -dumpversion"

    21     pipe = subprocess.Popen(compiler, shell=True,

    22                             stdout=subprocess.PIPE, stderr=subprocess.PIPE)

    23     gcc_output, gcc_error = pipe.communicate()

    24     if pipe.returncode:

    25       raise subprocess.CalledProcessError(pipe.returncode, compiler)

    27     result = re.match(r"(\d+)\.(\d+)", gcc_output)

    28     return result.group(1) + result.group(2)

    29   except Exception, e:

    30     if gcc_error:

    31       sys.stderr.write(gcc_error)

    32     print >> sys.stderr, "compiler_version.py failed to execute:", compiler

    33     print >> sys.stderr, e

    34     return ""

    36 def GetVersionFromEnvironment(compiler_env):

    37   """ Returns the version of compiler

    39   If the compiler was set by the given environment variable and exists,

    40   return its version, otherwise None is returned.

    41   """

    42   cxx = os.getenv(compiler_env, None)

    43   if cxx:

    44     cxx_version = GetVersion(cxx)

    45     if cxx_version != "":

    46       return cxx_version

    47   return None

    49 def main():

    50   # Check if CXX_target or CXX environment variable exists an if it does use

    51   # that compiler.

    52   # TODO: Fix ninja (see http://crbug.com/140900) instead and remove this code

    53   # In ninja's cross compile mode, the CXX_target is target compiler, while

    54   # the CXX is host. The CXX_target needs be checked first, though the target

    55   # and host compiler have different version, there seems no issue to use the

    56   # target compiler's version number as gcc_version in Android.

    57   cxx_version = GetVersionFromEnvironment("CXX_target")

    58   if cxx_version:

    59     print cxx_version

    60     return 0

    62   cxx_version = GetVersionFromEnvironment("CXX")

    63   if cxx_version:

    64     print cxx_version

    65     return 0

    67   # Otherwise we check the g++ version.

    68   gccversion = GetVersion("g++")

    69   if gccversion != "":

    70     print gccversion

    71     return 0

    73   return 1

    75 if __name__ == "__main__":

    76   sys.exit(main())

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