#!/usr/bin/env python # Copyright 2015 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. """Runs a linking command and optionally a strip command. This script exists to avoid using complex shell commands in gcc_toolchain.gni's tool("link"), in case the host running the compiler does not have a POSIX-like shell (e.g. Windows). """ import argparse import os import subprocess import sys import wrapper_utils # When running on a Windows host and using a toolchain whose tools are # actually wrapper scripts (i.e. .bat files on Windows) rather than binary # executables, the "command" to run has to be prefixed with this magic. # The GN toolchain definitions take care of that for when GN/Ninja is # running the tool directly. When that command is passed in to this # script, it appears as a unitary string but needs to be split up so that # just 'cmd' is the actual command given to Python's subprocess module. BAT_PREFIX = 'cmd /c call ' def CommandToRun(command): if command[0].startswith(BAT_PREFIX): command = command[0].split(None, 3) + command[1:] return command def main(): parser = argparse.ArgumentParser(description=__doc__) parser.add_argument('--strip', help='The strip binary to run', metavar='PATH') parser.add_argument('--unstripped-file', help='Executable file produced by linking command', metavar='FILE') parser.add_argument('--map-file', help=('Use --Wl,-Map to generate a map file. Will be ' 'gzipped if extension ends with .gz'), metavar='FILE') parser.add_argument('--dwp', help=('The dwp binary to run'), metavar='FILE') parser.add_argument('--output', required=True, help='Final output executable file', metavar='FILE') parser.add_argument('command', nargs='+', help='Linking command') args = parser.parse_args() # Work-around for gold being slow-by-default. http://crbug.com/632230 fast_env = dict(os.environ) fast_env['LC_ALL'] = 'C' result = wrapper_utils.RunLinkWithOptionalMapFile(args.command, env=fast_env, map_file=args.map_file) if result != 0: return result # If dwp is set, then package debug info for this exe. dwp_proc = None if args.dwp: exe_file = args.output if args.unstripped_file: exe_file = args.unstripped_file # Suppress warnings about duplicate CU entries (https://crbug.com/1264130) dwp_proc = subprocess.Popen(wrapper_utils.CommandToRun( [args.dwp, '-e', exe_file, '-o', exe_file + '.dwp']), stderr=subprocess.DEVNULL) # Finally, strip the linked executable (if desired). if args.strip: result = subprocess.call( CommandToRun([args.strip, '-o', args.output, args.unstripped_file])) if dwp_proc: dwp_result = dwp_proc.wait() if dwp_result != 0: sys.stderr.write('dwp failed with error code {}\n'.format(dwp_result)) return dwp_result return result if __name__ == "__main__": sys.exit(main())