media-libs/libvpx-1.3.0 provides library with soname "libvpx.so.1". media-libs/libvpx-1.4.0 provides library with soname "libvpx.so.2". media-libs/libvpx-1.4.0 should have SLOT="0/2" to allow package manager to automatically rebuild reverse dependencies (after they are fixed to use := or :0=). Output of `emerge` contained: !!! existing preserved libs: >>> package: media-libs/libvpx-1.4.0 * - /usr/lib64/libvpx.so.1 * - /usr/lib64/libvpx.so.1.3.0 * used by /usr/lib64/firefox/libxul.so (www-client/firefox-37.0.1) * used by /usr/lib64/libavcodec.so.56.26.100 (media-video/ffmpeg-2.6.2) * used by /usr/lib64/vlc/plugins/codec/libvpx_plugin.so (media-video/vlc-2.2.1) * used by /usr/lib64/xine/plugins/2.5/xineplug_decode_libvpx.so (media-libs/xine-lib-1.2.6-r1)
+ 20 May 2015; Mike Gilbert <floppym@gentoo.org> libvpx-1.4.0.ebuild, + libvpx-9999.ebuild: + Set SLOT=0/2, bug 547844.