$ cat /etc/portage/make.conf

# see /usr/share/portage/config/make.conf.example

CPU_FLAGS_X86="aes mmx mmxext popcnt sse sse2 sse3 sse4_1 sse4_2 ssse3"

PYTHON_TARGETS="python2_7 python3_5"
PYTHON_SINGLE_TARGET="python2_7"
USE_PYTHON="2.7"

ACCEPT_LICENSE="*"
CFLAGS="-O3 -pipe -march=native"
CXXFLAGS="${CFLAGS}"

VIDEO_CARDS="nvidia"
INPUT_DEVICES="keyboard mouse" # virtualbox

CHOST="x86_64-pc-linux-gnu"

USE="threads policykit consolekit utf8 ipv6"

USE="${USE} qt4 -qt5 -gtk -gtk3 wayland egl gles gles2 opengl opencl"
USE="${USE} ffmpeg -libav -vlc "
USE="${USE} udev evdev -systemd "
USE="${USE} -java -ruby "
USE="${USE} -sqlite -mysql postgres "
USE="${USE} -pam -semantic-desktop "
USE="${USE} pulseaudio alsa "
ALSA_CARDS="ca0106 hda-intel"

PORTAGE_TMPDIR=/tmp

PORTDIR="/usr/portage"

DISTDIR="${PORTDIR}/distfiles"

PKGDIR="${PORTDIR}/packages"

#PORTDIR_OVERLAY="/usr/local/portage"

MAKEOPTS="-j13"

EMERGE_DEFAULT_OPTS="--jobs=2 --keep-going=y "

#source /var/lib/layman/make.conf




$ emerge --info

Portage 2.2.26 (python 2.7.11-final-0, default/linux/amd64/13.0/desktop/kde, gcc-5.3.0, glibc-2.22-r4, 4.1.15-gentoo-r1 x86_64)
=================================================================
System uname: Linux-4.1.15-gentoo-r1-x86_64-Intel-R-_Core-TM-_i7_CPU_X_980_@_3.33GHz-with-gentoo-2.2
KiB Mem:    12276128 total,  10785724 free
KiB Swap:          0 total,         0 free
Timestamp of repository gentoo: Wed, 20 Apr 2016 06:30:01 +0000
sh bash 4.3_p42-r1
ld GNU ld (Gentoo 2.25.1 p1.1) 2.25.1
app-shells/bash:          4.3_p42-r1::gentoo
dev-java/java-config:     2.2.0-r3::gentoo
dev-lang/perl:            5.20.2::gentoo
dev-lang/python:          2.7.11-r2::gentoo, 3.5.1-r2::gentoo
dev-util/cmake:           3.5.2::gentoo
dev-util/pkgconfig:       0.28-r2::gentoo
sys-apps/baselayout:      2.2::gentoo
sys-apps/openrc:          0.19.1::gentoo
sys-apps/sandbox:         2.10-r1::gentoo
sys-devel/autoconf:       2.13::gentoo, 2.69::gentoo
sys-devel/automake:       1.11.6-r1::gentoo, 1.14.1::gentoo, 1.15::gentoo
sys-devel/binutils:       2.25.1-r1::gentoo
sys-devel/gcc:            4.9.3::gentoo, 5.3.0::gentoo
sys-devel/gcc-config:     1.7.3::gentoo
sys-devel/libtool:        2.4.6::gentoo
sys-devel/make:           4.1-r1::gentoo
sys-kernel/linux-headers: 4.3::gentoo (virtual/os-headers)
sys-libs/glibc:           2.22-r4::gentoo
Repositories:

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

ACCEPT_KEYWORDS="amd64"
ACCEPT_LICENSE="*"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-O3 -pipe -march=native"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/share/config /usr/share/gnupg/qualified.txt"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/sandbox.d /etc/terminfo"
CXXFLAGS="-O3 -pipe -march=native"
DISTDIR="/usr/portage/distfiles"
EMERGE_DEFAULT_OPTS="--jobs=2 --keep-going=y "
FCFLAGS="-O2 -pipe"
FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync news parallel-fetch preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr"
FFLAGS="-O2 -pipe"
GENTOO_MIRRORS="http://distfiles.gentoo.org"
LANG="en_US.UTF-8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
MAKEOPTS="-j13"
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"
PORTAGE_TMPDIR="/tmp"
USE="X a52 aac acl acpi alsa amd64 berkdb bluetooth branding bzip2 cairo cdda cdr cli consolekit cracklib crypt cups cxx dbus declarative dri dts dvd dvdr egl emboss encode evdev exif fam ffmpeg firefox flac fortran gdbm gif glamor gles gles2 gpm iconv ipv6 jpeg kde kipi lcms ldap libnotify mad mmx mmxext mng modules mp3 mp4 mpeg multilib ncurses nls nptl ogg opencl opengl openmp pango pcre pdf phonon plasma png policykit postgres ppds pulseaudio qt3support qt4 readline sdl seccomp session spell sse sse2 ssl startup-notification svg tcpd threads tiff truetype udev udisks unicode upower usb utf8 vorbis wayland wxwidgets x264 xattr xcb xcomposite xinerama xml xscreensaver xv xvid zlib" ABI_X86="64" ALSA_CARDS="ca0106 hda-intel" 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" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="aes mmx mmxext popcnt sse sse2 sse3 sse4_1 sse4_2 ssse3" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ublox ubx" INPUT_DEVICES="keyboard mouse" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-5" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_5" RUBY_TARGETS="ruby20 ruby21" USERLAND="GNU" VIDEO_CARDS="nvidia" 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"
USE_PYTHON="2.7"
Unset:  CC, CPPFLAGS, CTARGET, CXX, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS