This is what I see when emerging mpg123: (...) config.status: executing depfiles commands mpg123 0.65 Install path ............ /usr CPU Optimization......... generic_fpu Compiler Optimization ... 0 Audio output ............ alsa Gapless Support ......... enabled Debugging ............... disabled Seek table size ......... 1000 There is no USE variable for enabling or disabling this kind of optimizations. emerge -p mpg123: [ebuild R ] media-sound/mpg123-0.65 USE="alsa sdl (-3dnow) -esd -jack (-mmx) -nas -oss -portaudio" Or this optimization is included in CHOST? Reproducible: Always
Unsupported on amd64, see /usr/portage/profiles/default-linux/amd64/package.use.mask