Linux: preload ffmpeg in the zygote.

third_party/ffmpeg/ffmpeg.gyp

 # Copyright (c) 2009 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.
 
 {
   'includes': [
     '../../build/common.gypi',
   ],
   'target_defaults': {
     'conditions': [
       ['OS!="linux"', {'sources/': [['exclude', '/linux/']]}],
       ['OS!="mac"', {'sources/': [['exclude', '/mac/']]}],
       ['OS!="win"', {'sources/': [['exclude', '/win/']]}],
     ],
   },
   'variables': {
     'use_system_ffmpeg%': 0,
   },
   'targets': [
     {
       'variables': {
         'generate_stubs_script': 'generate_stubs.py',
         'sig_files': [
+          # Note that these must be listed in dependency order.
+          # (i.e. if A depends on B, then B must be listed before A.)
+          'avutil-50.sigs',

[awong, 2009/08/04 01:17:10]

what?  really?  What happens if it's not?  I didn't think it should matter...

[agl, 2009/08/04 01:18:46]

It doesn't load otherwise. avcodec depends on avutil. If avutil isn't loaded
first then libc will try to find avutil using the order listed in the manpage.
Since I don't have an system avutil which works, it fails to load avcodec.

           'avcodec-52.sigs',
           'avformat-52.sigs',
-          'avutil-50.sigs',
         ],
         'extra_header': 'ffmpeg_stub_headers.fragment',
       },
       'target_name': 'ffmpeg',
       'msvs_guid': 'D7A94F58-576A-45D9-A45F-EB87C63ABBB0',
       'dependencies': [
         'ffmpeg_binaries',
       ],
       'sources': [
         'include/libavcodec/avcodec.h',
@@ skipping 189 matching lines @@
         {
           'destination': '<(PRODUCT_DIR)/',
           'files': [
             '<@(source_files)',
           ]
         },
       ],
     },
   ],
 }