| #!/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, tool): |
| tool_output = tool_error = None |
| try: |
| # Note that compiler could be something tricky like "distcc g++". |
| if tool == "compiler": |
| compiler = compiler + " -dumpversion" |
| # 4.6 |
| version_re = re.compile(r"(\d+)\.(\d+)") |
| elif tool == "assembler": |
| compiler = compiler + " -Xassembler --version -x assembler -c /dev/null" |
| # Unmodified: GNU assembler (GNU Binutils) 2.24 |
| # Ubuntu: GNU assembler (GNU Binutils for Ubuntu) 2.22 |
| # Fedora: GNU assembler version 2.23.2 |
| version_re = re.compile(r"^GNU [^ ]+ .* (\d+).(\d+).*?$", re.M) |
| elif tool == "linker": |
| compiler = compiler + " -Xlinker --version" |
| # Using BFD linker |
| # Unmodified: GNU ld (GNU Binutils) 2.24 |
| # Ubuntu: GNU ld (GNU Binutils for Ubuntu) 2.22 |
| # Fedora: GNU ld version 2.23.2 |
| # Using Gold linker |
| # Unmodified: GNU gold (GNU Binutils 2.24) 1.11 |
| # Ubuntu: GNU gold (GNU Binutils for Ubuntu 2.22) 1.11 |
| # Fedora: GNU gold (version 2.23.2) 1.11 |
| version_re = re.compile(r"^GNU [^ ]+ .* (\d+).(\d+).*?$", re.M) |
| else: |
| raise Exception("Unknown tool %s" % tool) |
| |
| pipe = subprocess.Popen(compiler, shell=True, |
| stdout=subprocess.PIPE, stderr=subprocess.PIPE) |
| tool_output, tool_error = pipe.communicate() |
| if pipe.returncode: |
| raise subprocess.CalledProcessError(pipe.returncode, compiler) |
| |
| result = version_re.match(tool_output) |
| return result.group(1) + result.group(2) |
| except Exception, e: |
| if tool_error: |
| sys.stderr.write(tool_error) |
| print >> sys.stderr, "compiler_version.py failed to execute:", compiler |
| print >> sys.stderr, e |
| return "" |
| |
| |
| def main(args): |
| # Force the locale to C otherwise the version string could be localized |
| # making regex matching fail. |
| os.environ["LC_ALL"] = "C" |
| |
| tool = "compiler" |
| if len(args) == 1: |
| tool = args[0] |
| elif len(args) > 1: |
| print "Unknown arguments!" |
| |
| # Check if CXX environment variable exists and |
| # if it does use that compiler. |
| cxx = os.getenv("CXX", None) |
| if cxx: |
| cxxversion = GetVersion(cxx, tool) |
| if cxxversion != "": |
| print cxxversion |
| return 0 |
| else: |
| # Otherwise we check the g++ version. |
| gccversion = GetVersion("g++", tool) |
| if gccversion != "": |
| print gccversion |
| return 0 |
| |
| return 1 |
| |
| |
| if __name__ == "__main__": |
| sys.exit(main(sys.argv[1:])) |