[FFmpeg-trac] #3568(undetermined:new): Linker time bug, occurs when ffmpeg is configured and make with some restrictions

[FFmpeg]

#3568: Linker time bug, occurs when ffmpeg is configured and make with some
restrictions
-------------------------------------+-------------------------------------
             Reporter:  anhsoft      |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:
 Bug occurs when ffmpeg is configured and make with some restrictions, as
 that:
 {{{
 ./configure --extra-ldflags="-Wl,-add-stdcall-alias" \
 --enable-gpl \
 --disable-optimizations \
 --disable-asm \
 --enable-memalign-hack \
 --disable-programs \
 --disable-everything \
 --enable-muxer=avi \
 --enable-demuxer=avi \
 --enable-encoder=ffv1 \
 --enable-decoder=ffv1
 }}}
 where 'avi muxer' is present and then static library 'libavformat.a' links
 to any program using 'avformat'.

 How to reproduce:
 Configure and make ffmpeg-2.2.1 (in my case with gcc 4.8.1 on MinGW32 Win7
 platform) as described above.
 Get a ffmpeg static libs and link them to any program.
 Linker message will be near such:
 {{{
 g++ -static -static-libgcc -static-libstdc++ -o main.exe main.o -lswscale
 -lavformat -lavcodec -lavutil
 D:\projects\libs\ffd\lib\libavformat.a(avienc.o): In function
 `avi_write_header':
 d:\ffmpeg/libavformat/avienc.c:317: undefined reference to
 `av_convert_lang_to'
 collect2.exe: error: ld returned 1 exit status
 }}}
 PS: as it is follows from error message, the function 'av_convert_lang_to'
 isn't in 'libavformat.a' library. 'av_convert_lang_to' is declared and
 implemented in avlanguage.h and avlanguage.c respectively, but for some
 reason aren't makes with the specified configuration.
 I manually corrected the Makefile in folder 'libavformat' of the ffmpeg
 source, having changed a line
 {{{
 OBJS-$(CONFIG_AVI_MUXER) += avienc.o
 }}}
 to
 {{{
 OBJS-$(CONFIG_AVI_MUXER) += avienc.o avlanguage.o
 }}}
 and then the problem is solved...

--
Ticket URL: <https://trac.ffmpeg.org/ticket/3568>
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