>>> Completed installing faad2-2.0-r7 into /var/tmp/portage/faad2-2.0-r7/image/ * checking 22 files for package collisions existing file /usr/lib/libmp4v2.la is not owned by this package pena pmount-0.9.6 # qfile /usr/lib/libmp4v2.la media-sound/audacious (/usr/lib/libmp4v2.la) Portage 2.0.53_rc6 (default-linux/x86/2005.1, gcc-3.4.4, glibc-2.3.5-r3, 2.6.14-gentoo i686) ================================================================= System uname: 2.6.14-gentoo i686 Intel(R) Pentium(R) 4 CPU 2.40GHz Gentoo Base System version 1.12.0_pre9 ccache version 2.4 [enabled] dev-lang/python: 2.4.2 sys-apps/sandbox: 1.2.13 sys-devel/autoconf: 2.13, 2.59-r7 sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r1 sys-devel/binutils: 2.16.1 sys-devel/libtool: 1.5.20 virtual/os-headers: 2.6.11-r2 ACCEPT_KEYWORDS="x86 ~x86" AUTOCLEAN="yes" CBUILD="i686-pc-linux-gnu" CFLAGS="-O2 -march=pentium4 -pipe -mfpmath=sse -ffast-math -fomit-frame-pointer" CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3.5/env /usr/kde/3.5/share/config /usr/kde/3.5/shutdown /usr/kde/3/share/config /usr/share/X11/xkb /usr/share/config /var/qmail/control" CONFIG_PROTECT_MASK="/etc/env.d/java/ /etc/gconf /etc/init.d /etc/java-config/vms/ /etc/splash /etc/terminfo /etc/env.d" CXXFLAGS="-O2 -march=pentium4 -pipe -mfpmath=sse -ffast-math -fomit-frame-pointer" DISTDIR="/usr/src/distfiles" FEATURES="autoaddcvs autoconfig ccache collision-protect cvs distlocks fixpackages sandbox sfperms sign strict" GENTOO_MIRRORS=" http://trumpetti.atm.tut.fi/gentoo http://lame.lut.fi/linux/gentoo " LANG="en_US.utf8" LC_ALL="en_US.utf8" LINGUAS="fi" MAKEOPTS="-j2 -s" PKGDIR="/home/pkg/" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/mnt/checkouts/overlays/betelgeuse /mnt/checkouts/overlays/axxo" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="x86 X aac acl acpi alsa apm audiofile avi bash-completion berkdb bitmap-fonts bluetooth browserplugin bzip2 bzlib cdb cddb cdparanoia cdr crypt cups dbus dts dvd dvdr dvdread emboss esd firefox flac foomaticdb freetype gif gstreamer gtk2 hal java jpeg kde kdeenablefinal libg++ libwww logitech-mouse lzo mad makecheck mikmod mjpeg mmx mmx2 mp3 mpeg ncurses network nptl nptlonly nsplugin nvidia offensive ogg oggvorbis opengl pam pdflib png qt quicktime readline real rtc ruby samba spell sse sse2 ssl subversion svg symlink tcpd theora tiff truetype truetype-fonts type1-fonts udev unicode usb userlocales vorbis win32codecs xine xml xml2 xv xvid zlib video_cards_nvidia linguas_fi userland_GNU kernel_linux elibc_glibc" Unset: ASFLAGS, CTARGET, LDFLAGS
Solved in revision bump by forcibly disabling the AAC decoder, which failed playing back a test file. I expect to enable it again later, when a different decoder has been implemented.