[Ffmpeg-devel] Win32 unresolved external symbol

[Jan-Willem Mulder]

This is what I use to configure ffmpeg
./configure --enable-shared --extra-cflags="-D_XBOX -DUSE_FASTMEMCPY -I$PWD 
-I$PWD/lib/dts" --extra-ldflags="" --extra-libs="-L$PWD/lib/dts" \
--cpu=x86 --enable-mmx --disable-altivec \
--disable-audio-oss --disable-audio-beos --disable-v4l --disable-bktr 
--disable-dv1394 --enable-network \
--disable-ffserver --disable-ffplay --enable-gpl --disable-debug 
--disable-vhook \
--enable-dts --enable-pp --enable-memalign-hack --enable-mingw32
 after that I give 'make' and I have two dll's
 On 9/1/05, Michel Bardiaux <mbardiaux at mediaxim.be> wrote: 
> 
> Martin Boehme wrote:
> > Michel Bardiaux wrote:
> > [on the subject of linking static FFmpeg libs compiled with MinGW into
> > an MSVC app]
> >
> >> You have to add libgcc.a to the build (mine is in
> >> C:\MinGW\lib\gcc-lib\mingw32\3.2)
> >
> >
> > Is this really safe? I seem to remember there was a discussion about
> > this a while back, and the conclusion was that while linking to libgcc.a
> > works, it is a Bad Thing in some way or another, and that the libgcc.a
> > runtime doesn't play well in an MSVC environment...
> 
> Its only a very small part of the gcc runtime, the one containing
> functions called because the call is generated by the compiler for some
> kinds of math operations on types not supported by the hardware.
> 
> > IIRC, the gist was
> > that there was no good way to link a MinGW compiled static lib into an
> > MSVC app and the only "clean" solution is link against DLLs.
> 
> Good call, the OP did not actually specify whether he linked against
> static or DLL.
> 
> >
> > All of this is "IIRC" -- can someone jump in to clarify? I don't want to
> > start any rumours here... from all I know, the libgcc.a solution may be
> > completely safe...
> 
> And if its not and MSVC support is required, then --enable-shared should
> be mandatory. OK?
> 
> >
> > Martin
> >
> 
> 
> --
> Michel Bardiaux
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