bash-3.2$ gcc -Llibavcodec -Llibavdevice -Llibavfilter -Llibavformat -Llibavresample -Llibavutil -Llibpostproc -Llibswscale -Llibswresample -Wl,-dynamic,-search_paths_first  -o ffmpeg_g ffmpeg_opt.o ffmpeg_filter.o ffmpeg.o cmdutils.o  -lavdevice -lavfilter -lavformat -lavcodec -lpostproc -lswresample -lswscale -lavutil -Wl,-framework,Cocoa -L/opt/local/lib -lSDLmain -lSDL -lm -liconv -lbz2 -lz -Wl,-v
collect2 version 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.1.00) (i686 Darwin)
/usr/llvm-gcc-4.2/bin/../libexec/gcc/i686-apple-darwin10/4.2.1/ld -dynamic -arch x86_64 -macosx_version_min 10.6.8 -weak_reference_mismatches non-weak -o ffmpeg_g -lcrt1.10.6.o -Llibavcodec -Llibavdevice -Llibavfilter -Llibavformat -Llibavresample -Llibavutil -Llibpostproc -Llibswscale -Llibswresample -L/opt/local/lib -L/usr/llvm-gcc-4.2/bin/../lib/gcc/i686-apple-darwin10/4.2.1/x86_64 -L/Developer/usr/llvm-gcc-4.2/lib/gcc/i686-apple-darwin10/4.2.1/x86_64 -L/usr/lib/gcc/i686-apple-darwin10/4.2.1/x86_64 -L/usr/lib/i686-apple-darwin10/4.2.1 -L/usr/llvm-gcc-4.2/bin/../lib/gcc/i686-apple-darwin10/4.2.1 -L/usr/llvm-gcc-4.2/bin/../lib/gcc -L/Developer/usr/llvm-gcc-4.2/lib/gcc/i686-apple-darwin10/4.2.1 -L/usr/lib/gcc/i686-apple-darwin10/4.2.1 -L/usr/llvm-gcc-4.2/bin/../lib/gcc/i686-apple-darwin10/4.2.1/../../.. -L/Developer/usr/llvm-gcc-4.2/lib/gcc/i686-apple-darwin10/4.2.1/../../.. -dynamic -search_paths_first ffmpeg_opt.o ffmpeg_filter.o ffmpeg.o cmdutils.o -lavdevice -lavfilter -lavformat -lavcodec -lpostproc -lswresample -lswscale -lavutil -framework Cocoa -lSDLmain -lSDL -lm -liconv -lbz2 -lz -v -lSystem -lgcc -lSystem
ld: warning: directory not found for option '-Llibavresample'
@(#)PROGRAM:ld  PROJECT:ld64-127.2
Library search paths:
	libavcodec
	libavdevice
	libavfilter
	libavformat
	libavutil
	libpostproc
	libswscale
	libswresample
	/opt/local/lib
	/usr/llvm-gcc-4.2/lib/gcc/i686-apple-darwin10/4.2.1/x86_64
	/Developer/usr/llvm-gcc-4.2/lib/gcc/i686-apple-darwin10/4.2.1/x86_64
	/usr/lib/gcc/i686-apple-darwin10/4.2.1/x86_64
	/usr/lib/i686-apple-darwin10/4.2.1
	/usr/llvm-gcc-4.2/lib/gcc/i686-apple-darwin10/4.2.1
	/usr/llvm-gcc-4.2/lib/gcc
	/Developer/usr/llvm-gcc-4.2/lib/gcc/i686-apple-darwin10/4.2.1
	/usr/lib/gcc/i686-apple-darwin10/4.2.1
	/usr/llvm-gcc-4.2/lib
	/Developer/usr/llvm-gcc-4.2/lib
	/usr/lib
	/usr/local/lib
Framework search paths:
	/Library/Frameworks/
	/System/Library/Frameworks/
Undefined symbols for architecture x86_64:
  "_iconv_open", referenced from:
      _avcodec_decode_subtitle2 in libavcodec.a(utils.o)
  "_iconv", referenced from:
      _avcodec_decode_subtitle2 in libavcodec.a(utils.o)
  "_iconv_close", referenced from:
      _avcodec_decode_subtitle2 in libavcodec.a(utils.o)
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status