checking for main in -lcap... yes configure: error: You need either libswresample or libavresample. !!! Please attach the following file when seeking support: !!! /var/tmp/portage/media-tv/xbmc-12.0_rc2/work/xbmc-Frodo_rc2/config.log * ERROR: media-tv/xbmc-12.0_rc2 failed (configure phase): media-tv/xbmc-12.0_rc2 emerges OK after replacing media-video/libav-0.8.4 with media-video/ffmpeg-0.10.3.
Should work with >=media-video/libav-0.9_beta1: http://git.libav.org/?p=libav.git;a=blob;f=Changelog;h=f9f0f7ed4d961b1fc62ce228627d4e9ac58c2a43;hb=HEAD version 9_beta1 ... - add libavresample audio conversion library But that is masked for good reason: bug 443230.
Fixed in 12.1-r1 which requires libav-9.