Hi As per my understanding all the symbols in libraries are linked properly.
Now problem with,the way of using static library linking. Could anybody provide steps to compile ffmpeg based example programs here? Thanks Yuvaraj On Tue, Feb 7, 2012 at 4:21 PM, Alex Cohn <[email protected]> wrote: > On Tue, Feb 7, 2012 at 12:43, yuvaraj r <[email protected]> wrote: >> I have only static libraries >> >> Thanks >> >> Yuvaraj > > I'd recommend to add -Wl,--no-undefined to your gcc command line. > > Alex > >> On Tue, Feb 7, 2012 at 4:10 PM, Alex Cohn <[email protected]> wrote: >>> On Tue, Feb 7, 2012 at 06:54, yuvaraj r <[email protected]> wrote: >>>> Hi All, >>>> >>>> >>>> I compiled the ffmpeg source to generate the static(.a foramt) >>>> libraries in linux. >>>> >>>> When i am linking the static libraries with my application, >>>> >>>> i am getting undefined reference for many functions. >>>> >>>> Even i tried with pkg-config. >>>> >>>> Here command , what i tried >>>> >>>> >>>> gcc -shared -Wl,-soname,librecorder.so.1 '-Wl,-rpath,lib' -lpthread >>>> -lXdamage -lXfixes -lXmu -lXi -lX11 >>>> -L/home/peter/Desktop/screenrecorder/librecorder/src/../dependencies/lib >>>> -lavformat -lavcodec -lavutil -lswscale `pkg-config --libs --cflags >>>> libavutil` `pkg-config --libs --cflags libswscale` `pkg-config --libs >>>> --cflags libavcodec` `pkg-config --libs --cflags libavformat` -o >>>> librecorder.so.1.1 init.o main_entry.o xtoffmpeg.o >>>> >>>> >>>> It is generated the librecorder library. I have all dependency libs >>>> >>>> when executing ld command >>>> >>>> #ld librecorder.so.1.1 >>>> >>>> librecorder.so.1: undefined reference to `av_new_stream' >>>> librecorder.so.1: undefined reference to `av_read_packet' >>>> librecorder.so.1: undefined reference to `avcodec_alloc_frame' >>>> librecorder.so.1: undefined reference to `av_close_input_file' >>>> librecorder.so.1: undefined reference to `audio_resample' >>>> librecorder.so.1: undefined reference to `avcodec_find_encoder' >>>> librecorder.so.1: undefined reference to `av_find_input_format' >>>> librecorder.so.1: undefined reference to `avcodec_encode_audio' >>>> librecorder.so.1: undefined reference to `dump_format' >>>> librecorder.so.1: undefined reference to `av_open_input_file' >>>> librecorder.so.1: undefined reference to `avcodec_find_decoder' >>>> librecorder.so.1: undefined reference to `avcodec_close' >>>> librecorder.so.1: undefined reference to `av_find_stream_info' >>>> librecorder.so.1: undefined reference to `audio_resample_init' >>>> librecorder.so.1: undefined reference to `avpicture_get_size' >>>> librecorder.so.1: undefined reference to `av_register_all' >>>> librecorder.so.1: undefined reference to `avcodec_decode_audio' >>>> librecorder.so.1: undefined reference to `avcodec_open' >>>> librecorder.so.1: undefined reference to `avcodec_encode_video' >>>> librecorder.so.1: undefined reference to `av_destruct_packet_nofree' >>>> librecorder.so.1: undefined reference to `avpicture_fill' >>>> librecorder.so.1: undefined reference to `av_set_parameters' >>>> librecorder.so.1: undefined reference to `av_alloc_format_c >>>> >>>> Now problem with static libraries. >>>> >>>> >>>> #pkg-config --list-all | grep mpeg >>>> libswscale libswscale - FFmpeg image rescaling >>>> library >>>> libavutil libavutil - FFmpeg utility library >>>> libavformat libavformat - FFmpeg container format >>>> library >>>> libavcodec libavcodec - FFmpeg codec library >>>> >>>> >>>> How do i solve this issue >>>> >>>> >>>> Thanks >>>> >>>> >>>> Yuvaraj R >>> >>> As far as I know, -l flag on the gcc command line will prefer the >>> shared version of the library. I.e. if you have both libavformat.a and >>> libavformat.so visible to gcc, the latter will be used. >>> >>> BR, >>> Alex > _______________________________________________ > Libav-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/libav-user _______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user
