Поставьте какой-либо лёгкий браузер. luakit, например.

wgetpaste --verbose /var/tmp/portage/media-plugins/gst-plugins-ffmpeg-0.10.13-r1/temp/build.log
Apparently nothing was received. Perhaps the connection failed.
--2012-05-09 12:47:05--  https://api.github.com/gists
Resolving api.github.com... 207.97.227.243
Connecting to api.github.com|207.97.227.243|:443... connected.
HTTP request sent, awaiting response... 500 Internal Server Error
2012-05-09 12:47:06 ERROR 500: Internal Server Error.

Поместил бы вручную, но пока браузера нет не одного. Только иксы и awesome поставил пока.

Попробуйте так:

wgetpaste --verbose /var/tmp/portage/media-plugins/gst-plugins-ffmpeg-0.10.13-r1/temp/build.log

emerge opera -av

 * IMPORTANT: 2 news items need reading for repository 'gentoo'.
 * Use eselect news to read news items.


These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild  N     ] media-plugins/gst-plugins-ffmpeg-0.10.13-r1  USE="orc -hardened" 0 kB
[ebuild  N     ] media-plugins/gst-plugins-meta-0.10-r7  USE="X alsa dvd ffmpeg flac lame mp3 mpeg ogg vorbis wavpack -a52 -aac -dts -dv -dvb -http -libvisual -mms -musepack -mythtv -oss -pulseaudio -taglib -theora -v4l -vcd -vpx -xv" 0 kB
[ebuild  N     ] www-client/opera-11.62.1347-r1  USE="gstreamer -gtk -gtk3 -kde" LINGUAS="ru -af -az -be -bg -bn -cs -da -de -el -en_GB -es_ES -es_LA -et -fi -fr -fr_CA -fy -gd -hi -hr -hu -id -it -ja -ka -ko -lt -me -mk -ms -nb -nl -nn -pa -pl -pt -pt_BR -ro -sk -sr -sv -sw -ta -te -th -tl -tr -uk -uz -vi -zh_CN -zh_TW -zu" 0 kB

Total: 3 packages (3 new), Size of downloads: 0 kB

Would you like to merge these packages? [Yes/No] yes
>>> Verifying ebuild manifests
>>> Starting parallel fetch
>>> Emerging (1 of 3) media-plugins/gst-plugins-ffmpeg-0.10.13-r1
>>> Failed to emerge media-plugins/gst-plugins-ffmpeg-0.10.13-r1, Log file:
>>>  '/var/tmp/portage/media-plugins/gst-plugins-ffmpeg-0.10.13-r1/temp/build.log'
>>> Jobs: 0 of 3 complete, 1 failed                 Load avg: 3.02, 2.20, 1.97
*** Resuming merge...

These are the packages that would be merged, in order:

Calculating dependencies... done!
 * emerge --keep-going: www-client/opera-11.62.1347-r1 dropped due to
 * unsatisfied dependency.
 * emerge --keep-going: media-plugins/gst-plugins-meta-0.10-r7 dropped due to
 * unsatisfied dependency.

 * Messages for package media-plugins/gst-plugins-ffmpeg-0.10.13-r1:

 * ERROR: media-plugins/gst-plugins-ffmpeg-0.10.13-r1 failed (compile phase):
 *   emake failed.
 * 
 * Call stack:
 *     ebuild.sh, line  85:  Called src_compile
 *   environment, line 2303:  Called die
 * The specific snippet of code:
 *       emake || die "emake failed."
 * 
 * If you need support, post the output of 'emerge --info =media-plugins/gst-plugins-ffmpeg-0.10.13-r1',
 * the complete build log and the output of 'emerge -pqv =media-plugins/gst-plugins-ffmpeg-0.10.13-r1'.
 * The complete build log is located at '/var/tmp/portage/media-plugins/gst-plugins-ffmpeg-0.10.13-r1/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/media-plugins/gst-plugins-ffmpeg-0.10.13-r1/temp/environment'.
 * S: '/var/tmp/portage/media-plugins/gst-plugins-ffmpeg-0.10.13-r1/work/gst-ffmpeg-0.10.13'

 * Messages for package www-client/opera-11.62.1347-r1:

 * emerge --keep-going: www-client/opera-11.62.1347-r1 dropped due to
 * unsatisfied dependency.

 * Messages for package media-plugins/gst-plugins-meta-0.10-r7:

 * emerge --keep-going: media-plugins/gst-plugins-meta-0.10-r7 dropped due to
 * unsatisfied dependency.
 * 
 * The following 3 packages have failed to build or install:
 * 
 *  (media-plugins/gst-plugins-ffmpeg-0.10.13-r1::gentoo, ebuild scheduled for merge), Log file:
 *   '/var/tmp/portage/media-plugins/gst-plugins-ffmpeg-0.10.13-r1/temp/build.log'
 *  (www-client/opera-11.62.1347-r1::gentoo, ebuild scheduled for merge)
 *  (media-plugins/gst-plugins-meta-0.10-r7::gentoo, ebuild scheduled for merge)
 * 

 * IMPORTANT: 2 news items need reading for repository 'gentoo'.
 * Use eselect news to read news items.

Полный лог не выложу wgetpaste не работает:

сat /var/tmp/portage/media-plugins/gst-plugins-ffmpeg-0.10.13-r1/temp/build.log | wgetpaste 
Apparently nothing was received. Perhaps the connection failed. Enable --verbose or
--debug to get the output from wget that can help diagnose it correctly.