FFMpeg will not link to 2.1.1 release built as shared library

[boxerab]

FFMPeg will link with the 2.1 release.

It seems that a recent change to visibility of symbols is the cause: if OPJ_STATIC is defined,
then API symbols are marked "hidden". However, FFMpeg always defines OPJ_STATIC when linking, even for dynamic builds. So, linking fails in this case.

#   if __GNUC__ >= 4
#       if defined(OPJ_STATIC) /* static library uses "hidden" */
#           define OPJ_API    __attribute__ ((visibility ("hidden")))
#       else

The reason why FFMpeg always define OPJ_STATIC is because of mingw builds: mingw doesn't mangle names like gcc,

[malaterre]

I believe this is now solved upstream. Closing.

[szukw000]

Mathieu Malaterre wrote:

I believe this is now solved upstream. Closing.

What kind of believed upstream do you mean?

winfried

libavcodec/libopenjpegdec.o: In function libopenjpeg_decode_frame': ffmpeg-3.1.3/libavcodec/libopenjpegdec.c:378: undefined reference toopj_create_decompress'
ffmpeg-3.1.3/libavcodec/libopenjpegdec.c:396: undefined reference to opj_set_error_handler' ffmpeg-3.1.3/libavcodec/libopenjpegdec.c:397: undefined reference toopj_set_warning_handler'
ffmpeg-3.1.3/libavcodec/libopenjpegdec.c:398: undefined reference to opj_set_info_handler' ffmpeg-3.1.3/libavcodec/libopenjpegdec.c:409: undefined reference toopj_setup_decoder'
ffmpeg-3.1.3/libavcodec/libopenjpegdec.c:414: undefined reference to opj_stream_default_create' ffmpeg-3.1.3/libavcodec/libopenjpegdec.c:431: undefined reference toopj_stream_set_read_function'
ffmpeg-3.1.3/libavcodec/libopenjpegdec.c:432: undefined reference to opj_stream_set_skip_function' ffmpeg-3.1.3/libavcodec/libopenjpegdec.c:433: undefined reference toopj_stream_set_seek_function'
ffmpeg-3.1.3/libavcodec/libopenjpegdec.c:435: undefined reference to opj_stream_set_user_data' ffmpeg-3.1.3/libavcodec/libopenjpegdec.c:441: undefined reference toopj_stream_set_user_data_length'
ffmpeg-3.1.3/libavcodec/libopenjpegdec.c:443: undefined reference to opj_read_header' ffmpeg-3.1.3/libavcodec/libopenjpegdec.c:372: undefined reference toopj_create_decompress'
ffmpeg-3.1.3/libavcodec/libopenjpegdec.c:554: undefined reference to opj_image_destroy' ffmpeg-3.1.3/libavcodec/libopenjpegdec.c:556: undefined reference toopj_stream_destroy'
ffmpeg-3.1.3/libavcodec/libopenjpegdec.c:557: undefined reference to opj_destroy_codec' ffmpeg-3.1.3/libavcodec/libopenjpegdec.c:495: undefined reference toopj_decode'
libavcodec/libopenjpegdec.o: In function libopenjpeg_decode_init': ffmpeg-3.1.3/libavcodec/libopenjpegdec.c:338: undefined reference toopj_set_default_decoder_parameters'
libavcodec/libopenjpegdec.o: In function libopenjpeg_static_init': ffmpeg-3.1.3/libavcodec/libopenjpegdec.c:567: undefined reference toopj_version'
libavcodec/libopenjpegenc.o: In function libopenjpeg_encode_frame': ffmpeg-3.1.3/libavcodec/libopenjpegenc.c:705: undefined reference toopj_create_compress'
ffmpeg-3.1.3/libavcodec/libopenjpegenc.c:716: undefined reference to opj_set_error_handler' ffmpeg-3.1.3/libavcodec/libopenjpegenc.c:717: undefined reference toopj_set_warning_handler'
ffmpeg-3.1.3/libavcodec/libopenjpegenc.c:785: undefined reference to opj_stream_destroy' ffmpeg-3.1.3/libavcodec/libopenjpegenc.c:786: undefined reference toopj_destroy_codec'
ffmpeg-3.1.3/libavcodec/libopenjpegenc.c:718: undefined reference to opj_set_info_handler' ffmpeg-3.1.3/libavcodec/libopenjpegenc.c:724: undefined reference toopj_setup_encoder'
ffmpeg-3.1.3/libavcodec/libopenjpegenc.c:729: undefined reference to opj_stream_default_create' ffmpeg-3.1.3/libavcodec/libopenjpegenc.c:757: undefined reference toopj_stream_set_write_function'
ffmpeg-3.1.3/libavcodec/libopenjpegenc.c:758: undefined reference to opj_stream_set_skip_function' ffmpeg-3.1.3/libavcodec/libopenjpegenc.c:759: undefined reference toopj_stream_set_seek_function'
ffmpeg-3.1.3/libavcodec/libopenjpegenc.c:761: undefined reference to opj_stream_set_user_data' ffmpeg-3.1.3/libavcodec/libopenjpegenc.c:768: undefined reference toopj_start_compress'
ffmpeg-3.1.3/libavcodec/libopenjpegenc.c:769: undefined reference to opj_encode' ffmpeg-3.1.3/libavcodec/libopenjpegenc.c:770: undefined reference toopj_end_compress'
libavcodec/libopenjpegenc.o: In function libopenjpeg_encode_close': ffmpeg-3.1.3/libavcodec/libopenjpegenc.c:798: undefined reference toopj_image_destroy'
libavcodec/libopenjpegenc.o: In function libopenjpeg_encode_init': ffmpeg-3.1.3/libavcodec/libopenjpegenc.c:307: undefined reference toopj_set_default_encoder_parameters'
ffmpeg-3.1.3/libavcodec/libopenjpegenc.c:384: undefined reference to opj_image_destroy' libavcodec/libopenjpegenc.o: In functionmj2_create_image':
ffmpeg-3.1.3/libavcodec/libopenjpegenc.c:287: undefined reference to opj_image_create' /usr/lib64/gcc/x86_64-slackware-linux/5.3.0/../../../../x86_64-slackware-linux/bin/ld: libavcodec/libavcodec.so.57: hidden symbolopj_setup_decoder' isn't defined
/usr/lib64/gcc/x86_64-slackware-linux/5.3.0/../../../../x86_64-slackware-linux/bin/ld: final link failed: Bad value
collect2: error: ld returned 1 exit status
make: *** [libavcodec/libavcodec.so.57] Error 1

[malaterre]

that seemed to me like an exact duplicate of #802. Am I wrong ?

[szukw000]

@malaterre , I have made a test.

FFMPEG compiles bug-free with openjpeg-1.5.x .

So I made a copy of openjpeg2-git-2016-09-21-1/src/lib/openjp2/openjpeg.h . In openjpeg.h I
removed the lines between 79 and 108.

Then I inserted at line 79 the respective lines of openjpeg-1.5.3-1/libopenjpeg/openjpeg.h,
compiled and installed.

Now I was able to compile and install ffmpeg-3.1.3 bug-free.

winfried

[szukw000]

@malaterre , I used the following compilers:

gcc (GCC) 5.3.0 (Linux 4.7.3)
MSVC 19.0.24210.0 (WIN7-64, Community 2015)
gcc (Debian 4.9.2-10) 4.9.2 (PPC-64)

winfried

[malaterre]

@szukw000 you should instead follow instructions from: #802 (comment)