* Package:    media-sound/pianobar-2017.08.30
 * Repository: gentoo
 * Maintainer: sound@gentoo.org
 * USE:        abi_x86_64 amd64 elibc_glibc kernel_linux libav userland_GNU
 * FEATURES:   network-sandbox preserve-libs sandbox userpriv usersandbox
>>> Unpacking source...
>>> Unpacking pianobar-2017.08.30.tar.bz2 to /var/tmp/portage/media-sound/pianobar-2017.08.30/work
>>> Source unpacked in /var/tmp/portage/media-sound/pianobar-2017.08.30/work
>>> Preparing source in /var/tmp/portage/media-sound/pianobar-2017.08.30/work/pianobar-2017.08.30 ...
>>> Source prepared.
>>> Configuring source in /var/tmp/portage/media-sound/pianobar-2017.08.30/work/pianobar-2017.08.30 ...
>>> Source configured.
>>> Compiling source in /var/tmp/portage/media-sound/pianobar-2017.08.30/work/pianobar-2017.08.30 ...
make -j 1 V=1 DYNLINK=1 
x86_64-pc-linux-gnu-gcc -c -o src/main.o -O2 -pipe -march=native -std=c99 -I src/libpiano    -I/usr/include/json-c  -MMD -MF src/main.d -MP src/main.c
In file included from src/main.h:30:0,
                 from src/main.c:53:
src/player.h:37:10: fatal error: libavfilter/avfiltergraph.h: No such file or directory
 #include <libavfilter/avfiltergraph.h>
          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
make: *** [Makefile:108: src/main.o] Error 1
 * ERROR: media-sound/pianobar-2017.08.30::gentoo failed (compile phase):
 *   emake failed
 * 
 * If you need support, post the output of `emerge --info '=media-sound/pianobar-2017.08.30::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=media-sound/pianobar-2017.08.30::gentoo'`.
 * The complete build log is located at '/var/log/portage/media-sound:pianobar-2017.08.30:20180430-112720.log'.
 * For convenience, a symlink to the build log is located at '/var/tmp/portage/media-sound/pianobar-2017.08.30/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/media-sound/pianobar-2017.08.30/temp/environment'.
 * Working directory: '/var/tmp/portage/media-sound/pianobar-2017.08.30/work/pianobar-2017.08.30'
 * S: '/var/tmp/portage/media-sound/pianobar-2017.08.30/work/pianobar-2017.08.30'