1 #!/usr/bin/env python 2 # Copyright 2015 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. 5 6 """Runs a linking command and optionally a strip command. 7 8 This script exists to avoid using complex shell commands in 9 gcc_toolchain.gni's tool("link"), in case the host running the compiler 10 does not have a POSIX-like shell (e.g. Windows). 11 """ 12 13 import argparse 14 import subprocess 15 import sys 16 17 18 # When running on a Windows host and using a toolchain whose tools are 19 # actually wrapper scripts (i.e. .bat files on Windows) rather than binary 20 # executables, the "command" to run has to be prefixed with this magic. 21 # The GN toolchain definitions take care of that for when GN/Ninja is 22 # running the tool directly. When that command is passed in to this 23 # script, it appears as a unitary string but needs to be split up so that 24 # just 'cmd' is the actual command given to Python's subprocess module. 25 BAT_PREFIX = 'cmd /c call ' 26 27 def CommandToRun(command): 28 if command[0].startswith(BAT_PREFIX): 29 command = command[0].split(None, 3) + command[1:] 30 return command 31 32 33 def main(): 34 parser = argparse.ArgumentParser(description=__doc__) 35 parser.add_argument('--strip', 36 help='The strip binary to run', 37 metavar='PATH') 38 parser.add_argument('--unstripped-file', 39 required=True, 40 help='Executable file produced by linking command', 41 metavar='FILE') 42 parser.add_argument('--output', 43 required=True, 44 help='Final output executable file', 45 metavar='FILE') 46 parser.add_argument('command', nargs='+', 47 help='Linking command') 48 args = parser.parse_args() 49 50 # First, run the actual link. 51 result = subprocess.call(CommandToRun(args.command)) 52 if result != 0: 53 return result 54 55 # Finally, strip the linked executable (if desired). 56 if args.strip: 57 result = subprocess.call(CommandToRun([ 58 args.strip, '--strip-unneeded', '-o', args.output, args.unstripped_file 59 ])) 60 61 return result 62 63 64 if __name__ == "__main__": 65 sys.exit(main()) 66
