[Ffmpeg-devel] Build fails if all riff muxers are disabled

[Ramiro Polla]

M?ns Rullg?rd wrote:

>Ramiro Polla <angustia at arrozcru.no-ip.org> writes:
>
>  
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>>Martin Storsj? wrote:
>>
>>    
>>
>>>Hi,
>>>
>>>If all riff based muxers and demuxers are disabled (e.g. by
>>>--disable-muxers --disable-demuxers and then --enable-muxer for the
>>>ones needed), the build of libavformat fails with an undefined
>>>reference to av_codec_get_tag in libavformat/utils.c.
>>>      
>>>
>>This scares me...
>>That has been there since rev 7600 (over a month), and the exact
>>moment I'm about to press "Send" on an e-mail for the same issue, your
>>message appears...
>>
>>While trying to make a totally patent-free ffmpeg
>>    
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>ROTFLMAO
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>>(--disable-muxers
>>--disable-demuxers --disable-parsers --disable-encoders
>>--disable-decoders), I got that error. I don't know I sometimes test
>>this. Maybe just to make sure it will still compile.
>>
>>Attached patch adds riff.o to OBJS, since utils.o is there, and it
>>needs riff.o. Then removes all other riff.o from the Makefile.
>>    
>>
>
>I'd rather find out why there is such a dependency there.  To me, it
>smells like something that shouldn't be there in the first place.
>
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It as added in r7600, jan 21, by Michael. Maybe he'll find a better 
solution.