[Ffmpeg-devel] Win32 unresolved external symbol

[Michel Bardiaux]

Jan-Willem Mulder wrote:

Please dont top-post.

> I never used anything else then mingw to compile ffmpeg. Using latest mingw 
> / msys and a 2 weeks old ffmpeg from cvs (before libavutil was added). It is 
> compiled as a shared library used on the xbox btw.

Could you give your configure command?

If you use only mingw, and nothing more, then the 'lib' command simply 
fails with 'Ignored', right? Rather kludgey IMHO. I think the cases with 
and without MSVC involved are so different that its time to add some 
'--enable-msvc-support' for configure.

> 
> On 8/31/05, Michel Bardiaux <mbardiaux at mediaxim.be> wrote: 
> 
>>imnotmork_listas at area3.net wrote:
>>
>>>a3bm() {
>>>
>>>Hi!
>>>
>>>I'm trying to compile FFmpeg under windows to use it within MSVC 7.
>>>
>>>I'm getting this errors when i try to link the compiled libs. (I'll
>>>put just a few, 'cause there should be a global solution).
>>>
>>>"Linking...
>>>Creating library Debug/WaveEffect.lib and object Debug/WaveEffect.exp
>>>avcodec.lib(
>>>) : error LNK2001: unresolved external symbol ___divdi3 (...)
>>>avcodec.lib(ratecontrol.o) : error LNK2019: unresolved external symbol 
>>
>>__alloca referenced in function _modify_qscale (...)
>>
>>>avcodec.lib(mpeg12.o) : error LNK2019: unresolved external symbol 
>>
>>___umoddi3 referenced in function _mpeg1_encode_picture_header(...)
>>
>>>avcodec.lib(ratecontrol.o) : error LNK2019: unresolved external symbol 
>>
>>___fixunssfdi referenced in function _ff_rate_estimate_qscale
>>
>>>"
>>>This are 35 linker errors. :)
>>>
>>>Can anybody give a clue about it?
>>>
>>>}
>>>
>>
>>You have to add libgcc.a to the build (mine is in
>>C:\MinGW\lib\gcc-lib\mingw32\3.2)
>>
>>The section "6.3.1 Native Windows Compilation" in the doc is in need of
>>some serious rewriting! I think I have all the necessary info for the
>>Mingw+MSVC combo, but has anyone actually compiled using Mingw only and
>>a recent CVS?
>>


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Michel Bardiaux
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