1 files changed, 94 insertions, 0 deletions
diff --git a/third_party/libwebrtc/build/toolchain/gcc_link_wrapper.py b/third_party/libwebrtc/build/toolchain/gcc_link_wrapper.py
new file mode 100755
index 0000000000..b70de8b31c
--- /dev/null
+++ b/third_party/libwebrtc/build/toolchain/gcc_link_wrapper.py
@@ -0,0 +1,94 @@
+#!/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 output here because it doesn't seem to be useful. The most
+    # common error is a segfault, which will happen if files are missing.
+    with open(os.devnull, "w") as devnull:
+      dwp_proc = subprocess.Popen(wrapper_utils.CommandToRun(
+          [args.dwp, '-e', exe_file, '-o', exe_file + '.dwp']),
+                                  stdout=devnull,
+                                  stderr=subprocess.STDOUT)
+
+  # 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())