| #!/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 clang. |
| |
| (Based on corresponding tool for gcc in Chromium build system). |
| |
| Prints X*100 + Y if $CXX is pointing to clang X.Y.*. Prints 0 otherwise. |
| Note that this output convention is different from compiler_version.py's. This |
| also never returns a failing status, since we want to run this even on systems |
| without clang, and gyp will complain on a non-successful status. |
| """ |
| |
| import os |
| import re |
| import subprocess |
| import sys |
| |
| |
| def GetVersion(compiler): |
| try: |
| compiler = compiler + " --version" |
| pipe = subprocess.Popen(compiler, shell=True, |
| stdout=subprocess.PIPE, stderr=subprocess.PIPE) |
| output, error = pipe.communicate() |
| if pipe.returncode: |
| raise subprocess.CalledProcessError(pipe.returncode, compiler) |
| |
| result = re.search(r"clang version (\d+)\.?(\d+)?", output) |
| if result is None: |
| return "0" |
| minor_version = result.group(2) |
| if minor_version is None: |
| minor_version = "0" |
| return str(int(result.group(1)) * 100 + int(minor_version)) |
| except Exception, e: |
| if error: |
| sys.stderr.write(error) |
| print >> sys.stderr, "clang_version.py failed to execute:", compiler |
| print >> sys.stderr, e |
| return "0" |
| |
| |
| def main(): |
| # Check if CXX environment variable exists, and if it does use that compiler. |
| cxx = os.getenv("CXX", None) |
| if cxx: |
| print GetVersion(cxx) |
| else: |
| print "0" |
| |
| if __name__ == "__main__": |
| main() |
| sys.exit(0) |