USE flags: app-emulation/wine-0.9.7 +X -alsa -arts -cups -debug -esd +gif +glut -jack +jpeg +lcms -ldap -nas +ncurses +opengl -oss +scanner +truetype +xml2 0 kB /etc/portage/package.use: app-emulation/wine -alsa -arts # ls -l /usr/lib/wine/wine*.drv.so -rwxr-xr-x 1 root root 76K Feb 12 19:34 /usr/lib/wine/winealsa.drv.so* -rwxr-xr-x 1 root root 88K Feb 12 19:34 /usr/lib/wine/winearts.drv.so* -rwxr-xr-x 1 root root 76K Feb 12 19:34 /usr/lib/wine/wineaudioio.drv.so* -rwxr-xr-x 1 root root 87K Feb 12 19:34 /usr/lib/wine/wineesd.drv.so* -rwxr-xr-x 1 root root 76K Feb 12 19:34 /usr/lib/wine/winejack.drv.so* -rwxr-xr-x 1 root root 76K Feb 12 19:34 /usr/lib/wine/winenas.drv.so* -rwxr-xr-x 1 root root 80K Feb 12 19:34 /usr/lib/wine/wineoss.drv.so*
it does respect your USE actually ... what you're seeing are drivers that simply define functions that report back to wine "this feature is unimplemented"