>> так а где эти функции задеклОрированы?
> Собственно в этом вопрос, поиск по swScale_MMX резалтов не дал :((
> Предполагаю, чего-то не хватает, во и спрашиваю чего?
> ща запустил Греп пока висит....If you run configure with --enable-runtime-cpudetect --disable-mmx2 (on the latest in the repo. trunk), swscale fails to compile because it cannot find sws_init_swScale_MMX2() and swScale_MMX2(), which makes sense after examining the code in swscale.c. It creates variations on a template (swscale_template.c) depending on which assembly optimizations are available. However, if you've disabled MMX2, then the functions aren't generated and so subsequently on line 1265 of swscale.c, an error is raised.
If you support runtime cpu detection as well as turning certain optimizations off, then the code in lines 1263-1274 need to provide for that. Otherwise, you should prevent configurations that enable runtime cpu detection and disable assembly optimizations.
This arose because configure, for some reason, incorrectly chose to disable MMX2 optimizations for me (even when I specificed -enable-mmx2). But that's a separate issue - and I haven't figured out why it's doing that just yet.