Allow the bootstrap binary of GN (the one in TEMPDIR) to build and run on FreeBSD.

tools/gn/bootstrap/bootstrap.py

 #!/usr/bin/env python
 # Copyright 2014 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.
 
 """Bootstraps gn.
 
 It is done by first building it manually in a temporary directory, then building
 it with its own BUILD.gn to the final destination.
 """
 
 import contextlib
 import logging
 import optparse
 import os
 import shutil
 import subprocess
 import sys
 import tempfile
 
 BOOTSTRAP_DIR = os.path.dirname(os.path.abspath(__file__))
 GN_ROOT = os.path.dirname(BOOTSTRAP_DIR)
 SRC_ROOT = os.path.dirname(os.path.dirname(GN_ROOT))
 
 
 def is_linux():
   return sys.platform.startswith('linux')
 
+def is_freebsd():
+  return sys.platform.startswith('freebsd')
 
 def check_call(cmd, **kwargs):
   logging.debug('Running: %s', ' '.join(cmd))
   subprocess.check_call(cmd, cwd=GN_ROOT, **kwargs)
 
 
 @contextlib.contextmanager
 def scoped_tempdir():
   path = tempfile.mkdtemp()
   try:
@@ skipping 156 matching lines @@
       'base/threading/thread_restrictions.cc',
       'base/time/time.cc',
       'base/timer/elapsed_timer.cc',
       'base/timer/timer.cc',
       'base/tracked_objects.cc',
       'base/tracking_info.cc',
       'base/values.cc',
       'base/vlog.cc',
   ])
 
-  if is_linux():
+  if is_linux() or is_freebsd():
     static_libraries['libevent'] = {
         'sources': [
             'third_party/libevent/buffer.c',
-            'third_party/libevent/epoll.c',
             'third_party/libevent/evbuffer.c',
             'third_party/libevent/evdns.c',
             'third_party/libevent/event.c',
             'third_party/libevent/event_tagging.c',
             'third_party/libevent/evrpc.c',
             'third_party/libevent/evutil.c',
             'third_party/libevent/http.c',
             'third_party/libevent/log.c',
             'third_party/libevent/poll.c',
             'third_party/libevent/select.c',
             'third_party/libevent/signal.c',
             'third_party/libevent/strlcpy.c',
         ],
         'tool': 'cc',
-        'include_dirs': [
-            os.path.join(SRC_ROOT, 'third_party', 'libevent', 'linux')
-         ],
+        'include_dirs': [],
         'cflags': cflags + ['-DHAVE_CONFIG_H'],
     }
     static_libraries['xdg_user_dirs'] = {
         'sources': [
             'base/third_party/xdg_user_dirs/xdg_user_dir_lookup.cc',
         ],
         'tool': 'cxx',
     }
     static_libraries['base']['sources'].extend([
         'base/base_paths_posix.cc',
         'base/debug/debugger_posix.cc',
         'base/debug/stack_trace_posix.cc',
         'base/file_util_posix.cc',
         'base/files/file_enumerator_posix.cc',
         'base/files/file_posix.cc',
         'base/message_loop/message_pump_glib.cc',
         'base/message_loop/message_pump_gtk.cc',
         'base/message_loop/message_pump_libevent.cc',
         'base/nix/xdg_util.cc',
         'base/posix/file_descriptor_shuffle.cc',
-        'base/process/internal_linux.cc',
         'base/process/kill_posix.cc',
-        'base/process/process_handle_linux.cc',
         'base/process/process_handle_posix.cc',
-        'base/process/process_iterator_linux.cc',
-        'base/process/process_linux.cc',
-        'base/process/process_metrics_linux.cc',
         'base/process/process_metrics_posix.cc',
         'base/process/process_posix.cc',
         'base/safe_strerror_posix.cc',
         'base/strings/sys_string_conversions_posix.cc',
         'base/synchronization/condition_variable_posix.cc',
         'base/synchronization/lock_impl_posix.cc',
         'base/synchronization/waitable_event_posix.cc',
-        'base/sys_info_linux.cc',
         'base/sys_info_posix.cc',
-        'base/threading/platform_thread_linux.cc',
         'base/threading/platform_thread_posix.cc',
         'base/threading/thread_local_posix.cc',
         'base/threading/thread_local_storage_posix.cc',
         'base/time/time_posix.cc',
     ])
+    if is_linux():
+      static_libraries['base']['sources'].extend([
+          'base/process/internal_linux.cc',
+          'base/process/process_handle_linux.cc',
+          'base/process/process_iterator_linux.cc',
+          'base/process/process_linux.cc',
+          'base/process/process_metrics_linux.cc',
+          'base/sys_info_linux.cc',
+          'base/threading/platform_thread_linux.cc',
+      ])
+      static_libraries['libevent']['sources'].extend([
+          'third_party/libevent/epoll.c',
+      ])
+      static_libraries['libevent']['include_dirs'].extend([
+          os.path.join(SRC_ROOT, 'third_party', 'libevent', 'linux')
+      ])
+    elif is_freebsd():
+      static_libraries['base']['sources'].extend([
+          'base/process/process_handle_freebsd.cc',
+          'base/process/process_iterator_freebsd.cc',
+          'base/process/process_metrics_freebsd.cc',
+          'base/sys_info_freebsd.cc',
+          'base/threading/platform_thread_freebsd.cc',
+      ])
+      static_libraries['libevent']['sources'].extend([
+          'third_party/libevent/kqueue.c',
+      ])
+      static_libraries['libevent']['include_dirs'].extend([
+          os.path.join(SRC_ROOT, 'third_party', 'libevent', 'freebsd')
+      ])
+      ldflags.extend(['-lexecinfo'])
 
     cflags.extend(['-O2', '-pthread', '-pipe'])
 
     static_libraries['base'].setdefault('cflags', []).extend(
         subprocess.check_output(
             ['pkg-config', 'gtk+-2.0', 'x11', '--cflags']).split())
     ldflags.extend(['-pthread'])
     ldflags.extend(subprocess.check_output(
         ['pkg-config', 'gtk+-2.0', 'x11',
          '--libs-only-L', '--libs-only-other']).split())
@@ skipping 41 matching lines @@
   if not debug:
     cmd.append('--args=is_debug=false')
   check_call(cmd)
   check_call(['ninja', '-C', build_dir, 'gn'])
   if not debug:
     check_call(['strip', os.path.join(build_dir, 'gn')])
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))