$ emerge --info '=media-video/ffmpeg-3.2.2::gentoo'
Portage 2.3.3 (python 2.7.6-final-0, default/linux/amd64/13.0, gcc-4.9.4, glibc-2.22-r1, 4.9.6-gentoo-r1 x86_64)
=================================================================
                         System Settings
=================================================================
System uname: Linux-4.9.6-gentoo-r1-x86_64-Intel-R-_Core-TM-2_Quad_CPU_Q6600_@_2.40GHz-with-gentoo-2.2
KiB Mem:     8176860 total,     88616 free
KiB Swap:          0 total,         0 free
Timestamp of repository gentoo: Tue, 31 Jan 2017 17:00:01 +0000
sh bash 4.2_p53
ld GNU ld (Gentoo 2.25.1 p1.1) 2.25.1
app-shells/bash:          4.2_p53::gentoo
dev-java/java-config:     2.2.0-r3::gentoo
dev-lang/perl:            5.22.2::gentoo
dev-lang/python:          2.7.6::gentoo, 3.3.3::gentoo, 3.4.3::gentoo
dev-util/cmake:           3.7.1::gentoo
dev-util/pkgconfig:       0.28-r3::gentoo
sys-apps/baselayout:      2.2::gentoo
sys-apps/openrc:          0.22.4::gentoo
sys-apps/sandbox:         2.6-r1::gentoo
sys-devel/autoconf:       2.13::gentoo, 2.69::gentoo
sys-devel/automake:       1.11.6::gentoo, 1.13.4::gentoo, 1.14.1::gentoo, 1.15::gentoo
sys-devel/binutils:       2.25.1-r1::gentoo
sys-devel/gcc:            4.7.3-r1::gentoo, 4.8.4::gentoo, 4.9.4::gentoo, 5.4.0-r2::gentoo
sys-devel/gcc-config:     1.7.3::gentoo
sys-devel/libtool:        2.4.6-r2::gentoo
sys-devel/make:           3.82-r4::gentoo
sys-kernel/linux-headers: 4.9::gentoo (virtual/os-headers)
sys-libs/glibc:           2.22-r1::gentoo
Repositories:

gentoo
    location: /usr/portage
    sync-type: rsync
    sync-uri: rsync://rsync.gentoo.org/gentoo-portage
    priority: -1000

didactic-duck
    location: /var/lib/layman/didactic-duck
    masters: gentoo
    priority: 50

java
    location: /var/lib/layman/java
    masters: gentoo
    priority: 50

jorgicio
    location: /var/lib/layman/jorgicio
    masters: gentoo
    priority: 50

lorelei
    location: /var/lib/layman/lorelei
    masters: gentoo
    priority: 50
    aliases: lorelei-overlay

ultrabug
    location: /var/lib/layman/ultrabug
    masters: gentoo
    priority: 50

vmware
    location: /var/lib/layman/vmware
    masters: gentoo
    priority: 50

x11
    location: /var/lib/layman/x11
    masters: gentoo
    priority: 50

ACCEPT_KEYWORDS="amd64 ~amd64"
ACCEPT_LICENSE="*"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-O2 -pipe -march=native -mtune=native -mmmx -msse -msse2 -DVMW_HAVE_SMP_CALL_3ARG"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/lib64/libreoffice/program/sofficerc /usr/share/config /usr/share/gnupg/qualified.txt /var/lib/hsqldb /var/spool/munin-async/.ssh"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo"
CXXFLAGS="-O2 -pipe -march=native -mtune=native -mmmx -msse -msse2 -DVMW_HAVE_SMP_CALL_3ARG"
DISTDIR="/usr/portage/distfiles"
FCFLAGS="-O2 -pipe"
FEATURES="assume-digests binpkg-logs buildpkg candy config-protect-if-modified distlocks downgrade-backup ebuild-locks fixlafiles merge-sync news parallel-fetch preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-backup unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr"
FFLAGS="-O2 -pipe"
GENTOO_MIRRORS="http://portage.org.ua/"
LANG="en_US.UTF-8"
LC_ALL="en_US.UTF-8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
MAKEOPTS="-j5"
PKGDIR="/usr/portage/packages"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages --exclude=/.git"
PORTAGE_TMPDIR="/var/tmp"
USE="acl alsa amd64 bash-completion berkdb branding bzip2 cli cracklib crypt cxx dbus dri ffmpeg flag fortran gdbm gpm iconv ipv6 libnotify mmx mmxext modules multilib ncurses nls nptl opengl openmp pam pcre readline seccomp session sse sse2 sse3 ssl ssse3 tcpd unicode win32codecs xattr zlib zsh-completion" ABI_X86="64 32" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump author" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="mmx mmxext sse sse2 mmx mmxext sse sse2 sse3 ssse3" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock isync itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 timing tsip tripmate tnt ublox ubx" INPUT_DEVICES="evdev keyboard mouse" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="en ru uk de" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-6" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_4" RUBY_TARGETS="ruby21" USERLAND="GNU" VIDEO_CARDS="radeon radeonsi vmware" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account"
Unset:  CC, CPPFLAGS, CTARGET, CXX, EMERGE_DEFAULT_OPTS, INSTALL_MASK, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON