Hi,
It seems like checkasm has started failing to build in MSVC DLL setups
recently, see e.g. this instance:
https://fate.libav.org/i686-msvc-10-dll-wine
The reason is that once you build with --enable-shared with MSVC, you
can't link those object files via static libraries any longer. (See
d66c52c2b369401ba4face1c171ccb19130b7a31, that added support for MSVC
built DLLs, for the full explanation.) And checkasm links to the libs
statically in order to link to non-exported fucntions.
In practice, this hasn't been an issue so far, but since
972c71e9cb63e24f57ee481e413199c7d88a8813, checkasm seems to pull in enough
object files from libavcodec to start exhibiting the problem I explained
in the commit when MSVC DLL support as added above. So it has only worked
by coincidence so far.
We could of course try to figure out what part of the dsp object files
that checkasm links suddenly pulls in bsf code in this link, but that'd
also be just hacking around the problem.
Since checkasm in MSVC DLL builds isn't that important, since it's covered
pretty well in other test setups anyway, I would suggest to just disable
checkasm in this case. We easily have got CONFIG_SHARED available in
makefile, but I guess we'd need to add something else to identify MSVC. Or
just a "disable checkasm" or similar, somewhere in configure?
// Martin
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