Bug report: x264 link fails on Mac (x86_64, Lion 10.7.4)

X264 build: x264-snapshot-20120717-2245

Undefined symbols encountered when building on Mac under Lion, resolved by adding MacOS frameworks to
final link.

Undefined symbols:

[mybook:~/Desktop/x264-snapshot-20120717-2245] me% gcc -o x264 x264.o input/input.o
input/timecode.o input/raw.o input/y4m.o output/raw.o output/matroska.o output/matroska_ebml.o
output/flv.o output/flv_bytestream.o filters/filters.o filters/video/video.o
filters/video/source.o filters/video/internal.o filters/video/resize.o filters/video/cache.o
filters/video/fix_vfr_pts.o filters/video/select_every.o filters/video/crop.o
filters/video/depth.o input/thread.o input/lavf.o libx264.a -L. -lavformat -lpostproc -lavcodec
-lswscale -lavutil -lm -lz -lbz2 -lpthread -lswscale -lavutil -m64 -lm -arch x86_64 -lpthread
Undefined symbols for architecture x86_64:
  "_kCFAllocatorDefault", referenced from:
      _ff_vda_create_decoder in libavcodec.a(vda.o)
      _ff_vda_decoder_decode in libavcodec.a(vda.o)
  "_CFDataCreate", referenced from:
      _ff_vda_create_decoder in libavcodec.a(vda.o)
      _ff_vda_decoder_decode in libavcodec.a(vda.o)
  "_kCFTypeDictionaryKeyCallBacks", referenced from:
      _ff_vda_create_decoder in libavcodec.a(vda.o)
      _ff_vda_decoder_decode in libavcodec.a(vda.o)
  "_kCFTypeDictionaryValueCallBacks", referenced from:
      _ff_vda_create_decoder in libavcodec.a(vda.o)
      _ff_vda_decoder_decode in libavcodec.a(vda.o)
  "_CFDictionaryCreateMutable", referenced from:
      _ff_vda_create_decoder in libavcodec.a(vda.o)
  "_CFNumberCreate", referenced from: