[gentoo-user] Cannot reinstall ffmpeg since new cpu flags

[Matthias Hanft]

Hi,

I have installed the new CPU_FLAGS_X86, as "cpuinfo2cpuflags-x86"
told me: CPU_FLAGS_X86="mmx mmxext sse sse2 sse3"

When I did "emerge -NDuv @world" afterwards, there were some re-installs.
Everything was fine, except ffmpeg. emerge displays:

[ebuild   R    ] media-video/ffmpeg-1.2.6-r1  USE="bzip2 encode examples fontconfig gnutls hardcoded-tables iconv libcaca mp3 network truetype vorbis x264 xvid zlib -X -aac -aacplus -alsa (-altivec)
-amr -bindist -bluray -cdio (-celt) -cpudetection -debug -doc -faac -fdk -flite -frei0r -gsm -iec61883 -ieee1394 -jack -jpeg2k -libass -libsoxr -libv4l -modplug (-neon) -openal -openssl -opus -oss
-pic -pulseaudio -rtmp -schroedinger -sdl -speex -static-libs {-test} -theora -threads -twolame -v4l -vaapi -vdpau (-vis) -vpx (-3dnow%) (-3dnowext%) (-avx%) (-mmx%) (-mmxext%) (-ssse3%)"
CPU_FLAGS_X86="mmx%* mmxext%* -3dnow% -3dnowext% -avx% -ssse3%" FFTOOLS="aviocat cws2fws ffescape ffeval fourcc2pixfmt graph2dot ismindex pktdumper qt-faststart trasher" 0 KiB

and running emerge, after many lines, I get

[...]
/var/tmp/portage/media-video/ffmpeg-1.2.6-r1/work/ffmpeg-1.2.6/libavcodec/mpeg12.c:1164:12: warning: 'mpeg_decode_update_thread_context' defined but not used [-Wunused-function]
 static int mpeg_decode_update_thread_context(AVCodecContext *avctx, const AVCodecContext *avctx_from)
            ^
/var/tmp/portage/media-video/ffmpeg-1.2.6-r1/work/ffmpeg-1.2.6/common.mak:48: recipe for target 'libavcodec/motion_est.o' failed
make: *** [libavcodec/motion_est.o] Error 1
make: *** Waiting for unfinished jobs....
 * ERROR: media-video/ffmpeg-1.2.6-r1::gentoo failed (compile phase):
 *   emake failed

Google can't find this special error message (yet?), so I believe I'm
the only one getting that error (and, hence, didn't want to file a bug
report instantly). Perhaps I set some weird use flags?

(No graphics installed on that machine, it's just a server which uses
command-line ffmpeg-converting, mainly sound files, not even videos.)

Thanks,

-Matt