FFmpeg in-tree build for mac.

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.
 
+# TODO(ajwong): Determine if we want to statically link libz.
+
 {
   'target_defaults': {
     'conditions': [
       ['OS!="linux" and OS!="freebsd"', {'sources/': [['exclude', '/linux/']]}],
       ['OS!="mac"', {'sources/': [['exclude', '/mac/']]}],
       ['OS!="win"', {'sources/': [['exclude', '/win/']]}],
     ],
     'variables': {
       # Since we are not often debugging FFmpeg, and performance is
       # unacceptable without optimization, freeze the optimizations to -O2.
@@ skipping 16 matching lines @@
     'shared_generated_dir': '<(SHARED_INTERMEDIATE_DIR)/third_party/ffmpeg',
     'asm_library': 'ffmpegasm',
   },
   'conditions': [
     # This condition is for migrating from pre-built binaries to an in-tree
     # source build.  Most of these should be removed once FFmpeg is built on
     # mac and linux.  Windows will take more work.
     #
     # TODO(ajwong): Per the comment above, reduce this conditional's size and
     # determine if in-tree build in Windows is tractable.
-    ['(OS!="linux" and OS!="freebsd") or use_system_ffmpeg!=0', {
+    ['(OS!="linux" and OS!="freebsd" and OS!="mac") or use_system_ffmpeg!=0', {
       'variables': {
         'target_for_binaries': 'ffmpeg_binaries',
         'ffmpeg_include_root': 'include',
       },
     },{  # else OS=="linux"
       'variables': {
         'target_for_binaries': 'ffmpegsumo_nolink',
         'ffmpeg_include_root': 'source/patched-ffmpeg-mt',
       },
       'targets': [
         {
           'target_name': 'ffmpegsumo',
+          'product_name': 'libffmpegsumo',
           'type': 'shared_library',
           'dependencies': [
             'make_ffmpeg_asm_lib',
           ],
           'sources': [
             'source/patched-ffmpeg-mt/libavcodec/aac.c',
             'source/patched-ffmpeg-mt/libavcodec/aac_ac3_parser.c',
             'source/patched-ffmpeg-mt/libavcodec/aac_parser.c',
             'source/patched-ffmpeg-mt/libavcodec/aactab.c',
             'source/patched-ffmpeg-mt/libavcodec/allcodecs.c',
@@ skipping 78 matching lines @@
             'source/patched-ffmpeg-mt/libavutil/mem.c',
             'source/patched-ffmpeg-mt/libavutil/rational.c',
 
             # Config file for the OS and architecture.
             'source/config/<(ffmpeg_branding)/<(OS)/<(target_arch)/config.h',
           ],
           'include_dirs': [
             'source/config/<(ffmpeg_branding)/<(OS)/<(target_arch)',
             'source/patched-ffmpeg-mt',
           ],
+          'defines': [
+            'HAVE_AV_CONFIG_H',
+            '_POSIX_C_SOURCE=200112',
+          ],
           'cflags': [
-            '-DHAVE_AV_CONFIG_H',
-            '-D_ISOC99_SOURCE',
-            '-D_POSIX_C_SOURCE=200112',
-            '-std=c99',
-            '-D_LARGEFILE_SOURCE',
-            '-pthread',
-            '-fno-math-errno',
-            '-fomit-frame-pointer'
-          ],
-          'cflags!': [
-            # Ensure the symbols are exported.
-            '-fvisibility=hidden',
-          ],
-          'ldflags': [
-            '-Wl,-Bsymbolic',
-            '-L<(shared_generated_dir)',
-          ],
-          'libraries': [
-            '-l<(asm_library)',
-            '-lm',
-
-            # TODO(ajwong): Statically link these once we resolve the
-            # PIC/non-PIC issues on x64.
-            '-lz',
+            '-fomit-frame-pointer',
           ],
           'conditions': [
-            ['target_arch=="x64"', {
-              'cflags': [
-                # x64 requires PIC for shared libraries. This is opposite
-                # of ia32 where due to a slew of inline assembly using ebx,
-                # FFmpeg CANNOT be built with PIC.
-                '-fPIC',
-                '-DPIC',
-              ],
-            }],
             ['ffmpeg_branding!="Chrome"', {
               'sources!': [
                 # Exclude files that should only be used if doing a branded
                 # Google Chrome build.
                 'source/patched-ffmpeg-mt/libavcodec/aac.c',
                 'source/patched-ffmpeg-mt/libavcodec/aac_ac3_parser.c',
                 'source/patched-ffmpeg-mt/libavcodec/aac_parser.c',
                 'source/patched-ffmpeg-mt/libavcodec/aactab.c',
                 'source/patched-ffmpeg-mt/libavcodec/cabac.c',
                 'source/patched-ffmpeg-mt/libavcodec/error_resilience.c',
                 'source/patched-ffmpeg-mt/libavcodec/golomb.c',
                 'source/patched-ffmpeg-mt/libavcodec/h264.c',
                 'source/patched-ffmpeg-mt/libavcodec/h264_parser.c',
                 'source/patched-ffmpeg-mt/libavcodec/h264idct.c',
                 'source/patched-ffmpeg-mt/libavcodec/h264pred.c',
                 'source/patched-ffmpeg-mt/libavcodec/mpeg4audio.c',
                 'source/patched-ffmpeg-mt/libavcodec/mpegaudio.c',
                 'source/patched-ffmpeg-mt/libavcodec/mpegaudio_parser.c',
                 'source/patched-ffmpeg-mt/libavcodec/mpegaudiodata.c',
                 'source/patched-ffmpeg-mt/libavcodec/mpegaudiodec.c',
                 'source/patched-ffmpeg-mt/libavcodec/mpegaudiodecheader.c',
                 'source/patched-ffmpeg-mt/libavcodec/mpegvideo.c',
                 'source/patched-ffmpeg-mt/libavformat/id3v2.c',
                 'source/patched-ffmpeg-mt/libavformat/isom.c',
                 'source/patched-ffmpeg-mt/libavformat/mov.c',
                 'source/patched-ffmpeg-mt/libavformat/mp3.c',
               ],
-            }],
+            }],  # ffmpeg_branding
+            ['target_arch=="x64"', {
+              # x64 requires PIC for shared libraries. This is opposite
+              # of ia32 where due to a slew of inline assembly using ebx,
+              # FFmpeg CANNOT be built with PIC.
+              'defines': [
+                'PIC',
+              ],
+              'cflags': [
+                '-fPIC',
+              ],
+            }],  # target_arch
+            ['OS=="linux" or OS=="freebsd"', {
+              'defines': [
+                '_ISOC99_SOURCE',
+                '_LARGEFILE_SOURCE',
+              ],
+              'cflags': [
+                '-std=c99',
+                '-pthread',
+                '-fno-math-errno',
+              ],
+              'cflags!': [
+                # Ensure the symbols are exported.
+                #
+                # TODO(ajwong): Fix common.gypi to only add this flag for
+                # _type != shared_library.
+                '-fvisibility=hidden',
+              ],
+              'link_settings': {
+                'ldflags': [
+                  '-Wl,-Bsymbolic',
+                  '-L<(shared_generated_dir)',
+                ],
+                'libraries': [
+                  # TODO(ajwong): When scons is dead, collapse this with the
+                  # absolute path entry inside the OS="mac" conditional, and
+                  # move it out of the conditionals block altogether.
+                  '-l<(asm_library)',
+
+                  '-lz',
+                ],
+              },
+            }],  # OS=="linux" or OS=="freebsd"
+            ['OS=="mac"', {
+              'libraries': [
+                # TODO(ajwong): Move into link_settings when this is fixed:
+                #
+                # http://code.google.com/p/gyp/issues/detail?id=108
+                '<(shared_generated_dir)/<(STATIC_LIB_PREFIX)<(asm_library)<(STATIC_LIB_SUFFIX)',
+              ],
+              'link_settings': {
+                'libraries': [
+                  '$(SDKROOT)/usr/lib/libz.dylib',
+                ],
+              },
+              'xcode_settings': {
+                'GCC_SYMBOLS_PRIVATE_EXTERN': 'NO',  # No -fvisibility=hidden
+                'GCC_DYNAMIC_NO_PIC': 'YES',         # -mdynamic-no-pic
+                                                     # (equiv -fno-PIC)
+                'DYLIB_INSTALL_NAME_BASE': '@loader_path',
+                'LIBRARY_SEARCH_PATHS': [
+                  '<(shared_generated_dir)'
+                ],
+                'OTHER_LDFLAGS': [
+                  # This is needed because FFmpeg cannot be built as PIC, and
+                  # thus we need to instruct the linker to allow relocations
+                  # for read-only segments for this target to be able to
+                  # generated the shared library on Mac.
+                  #
+                  # This makes Mark sad, but he's okay with it since it is
+                  # isolated to this module. When Mark finds this in the
+                  # future, and has forgotten this conversation, this comment
+                  # should remind him that the world is still nice and
+                  # butterflies still exist...as do rainbows, sunshine,
+                  # tulips, etc., etc...but not kittens. Those went away
+                  # with this flag.
+                  '-Wl,-read_only_relocs,suppress'
+                ],
+              },
+            }],  # OS=="mac"
           ],
           'actions': [
             {
               # Needed to serialize the output of make_ffmpeg_asm_lib with
               # this target being built.
               'action_name': 'ffmpegasm_barrier',
               'inputs': [
                 '<(shared_generated_dir)/<(STATIC_LIB_PREFIX)<(asm_library)<(STATIC_LIB_SUFFIX)',
               ],
               'outputs': [
@@ skipping 15 matching lines @@
             '../yasm/yasm.gyp:yasm',
           ],
           'sources': [
             # The FFmpeg yasm files.
             'source/patched-ffmpeg-mt/libavcodec/x86/dsputil_yasm.asm',
             'source/patched-ffmpeg-mt/libavcodec/x86/fft_mmx.asm',
           ],
           'rules': [
             {
               'conditions': [
-                ['target_arch=="ia32"', {
+                ['OS=="linux" or OS=="freebsd"', {
                   'variables': {
-                    'yasm_flags': [
-                      '-DARCH_X86_32',
-                      '-m', 'x86',
-                    ],
+                    'obj_format': 'elf',
                   },
-                },],
-                ['target_arch=="x64"', {
+                  'conditions': [
+                    ['target_arch=="ia32"', {
+                      'variables': {
+                        'yasm_flags': [
+                          '-DARCH_X86_32',
+                          '-m', 'x86',
+                        ],
+                      },
+                    }],
+                    ['target_arch=="x64"', {
+                      'variables': {
+                        'yasm_flags': [
+                          '-DARCH_X86_64',
+                          '-m', 'amd64',
+                          '-DPIC',
+                        ],
+                      },
+                    }],
+                  ],
+                }], ['OS=="mac"', {
                   'variables': {
-                    'yasm_flags': [
-                      '-DARCH_X86_64',
-                      '-m', 'amd64',
-                      '-DPIC',
-                    ],
+                    'obj_format': 'macho',
+                    'yasm_flags': [ '-DPREFIX', ],
                   },
-                },],
+                  'conditions': [
+                    ['target_arch=="ia32"', {
+                      'variables': {
+                        'yasm_flags': [
+                          '-DARCH_X86_32',
+                          '-m', 'x86',
+                        ],
+                      },
+                    }],
+                    ['target_arch=="x64"', {
+                      'variables': {
+                        'yasm_flags': [
+                          '-DARCH_X86_64',
+                          '-m', 'amd64',
+                          '-DPIC',
+                        ],
+                      },
+                    }],
+                  ],
+                }],
               ],
               'rule_name': 'assemble',
               'extension': 'asm',
               'inputs': [ '<(PRODUCT_DIR)/yasm', ],
               'outputs': [
                 '<(shared_generated_dir)/<(RULE_INPUT_ROOT).o',
               ],
               'action': [
                 '<(PRODUCT_DIR)/yasm',
-                '-f', 'elf',
+                '-f', '<(obj_format)',
                 '<@(yasm_flags)',
                 '-I', 'source/patched-ffmpeg-mt/libavcodec/x86/',
                 '-o', '<(shared_generated_dir)/<(RULE_INPUT_ROOT).o',
                 '<(RULE_INPUT_PATH)',
               ],
               'process_outputs_as_sources': 0,
               'message': 'Build ffmpeg yasm build <(RULE_INPUT_PATH).',
             },
           ],
         },
         {
           'target_name': 'make_ffmpeg_asm_lib',
           'type': 'none',
           'dependencies': [
             'assemble_ffmpeg_asm',
           ],
           'sources': [
           ],
           'actions': [
             {
               'action_name': 'make_library',
               'variables': {
                 # Make sure this stays in sync with the corresponding sources
                 # in assemble_ffmpeg_asm.
                 'asm_objects': [
                   '<(shared_generated_dir)/dsputil_yasm.o',
                   '<(shared_generated_dir)/fft_mmx.o',
                 ],
-                'library_path': '<(shared_generated_dir)/lib<(asm_library)<(STATIC_LIB_SUFFIX)',
+                'library_path': '<(shared_generated_dir)/<(STATIC_LIB_PREFIX)<(asm_library)<(STATIC_LIB_SUFFIX)',
               },
               'inputs': [ '<@(asm_objects)', ],
               'outputs': [ '<(library_path)', ],
               'action': [ 'ar', 'rcs', '<(library_path)', '<@(asm_objects)', ],
               'process_outputs_as_sources': 0,
               'message': 'Packate ffmpeg assembly into <(library_path).',
             },
           ],
         },
         {
@@ skipping 225 matching lines @@
                 'source_files': [
                 ],
               },
         }], ['OS=="mac"', {
               # TODO(ajwong): These files are also copied in:
               # webkit/tools/test_shell/test_shell.gyp and
               # chrome/chrome.gyp
               # Need to consolidate the copies in one place. (BUG=23602)
               'variables': {
                 'source_files': [
-                  'binaries/<(ffmpeg_bin_dir)/libavcodec.52.dylib',
-                  'binaries/<(ffmpeg_bin_dir)/libavformat.52.dylib',
-                  'binaries/<(ffmpeg_bin_dir)/libavutil.50.dylib',
                 ],
               },
         }],
       ],
       'copies': [
         {
           'destination': '<(PRODUCT_DIR)/',
           'files': [
             '<@(source_files)',
           ]
         },
       ],
     },
   ],
 }
 
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