emerge --info redshift

# emerge --info redshift
Portage 2.3.13 (python 3.4.6-final-0, default/linux/arm64/13.0, gcc-7.2.0, glibc-2.26-r5, 3.10.104 aarch64)
=================================================================
                         System Settings
=================================================================
System uname: Linux-3.10.104-aarch64-with-gentoo-2.4.1
KiB Mem:     2037392 total,    178352 free
KiB Swap:    4194300 total,   4034744 free
Timestamp of repository gentoo: Mon, 15 Jan 2018 15:30:01 +0000
Head commit of repository gentoo: 16c2853397bbd0cc422aece6a75d329222a605d0
sh bash 4.4_p12
ld GNU ld (Gentoo 2.29.1 p3) 2.29.1
distcc 3.2rc1 aarch64-unknown-linux-gnu [enabled]
app-shells/bash:      4.4_p12::gentoo
dev-java/java-config: 2.2.0-r3::gentoo
dev-lang/perl:        5.26.1-r1::gentoo
dev-lang/python:      2.7.14-r1::gentoo, 3.4.6-r1::gentoo, 3.5.4-r1::gentoo
dev-util/cmake:       3.10.0::gentoo
dev-util/pkgconfig:   0.29.2::gentoo
sys-apps/baselayout:  2.4.1-r2::gentoo
sys-apps/openrc:      0.34.9::gentoo
sys-apps/sandbox:     2.12::gentoo
sys-devel/autoconf:   2.13::gentoo, 2.69-r4::gentoo
sys-devel/automake:   1.11.6-r2::gentoo, 1.15.1-r1::gentoo
sys-devel/binutils:   2.29.1-r1::gentoo
sys-devel/gcc:        7.2.0::gentoo
sys-devel/gcc-config: 1.9.1::gentoo
sys-devel/libtool:    2.4.6-r4::gentoo
sys-devel/make:       4.2.1-r1::gentoo
sys-libs/glibc:       2.26-r5::gentoo
Repositories:

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

localrepo
    location: /usr/local/portage
    masters: gentoo

ACCEPT_KEYWORDS="arm64"
ACCEPT_LICENSE="*"
CBUILD="aarch64-linux-gnu"
CFLAGS="-O2 -pipe -march=armv8-a+crypto+crc -mtune=cortex-a53"
CHOST="aarch64-linux-gnu"
CONFIG_PROTECT="/etc /usr/lib64/libreoffice/program/sofficerc /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/revdep-rebuild /etc/sandbox.d /etc/terminfo /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c"
CXXFLAGS="-O2 -pipe -march=armv8-a+crypto+crc -mtune=cortex-a53"
DISTDIR="/usr/portage/distfiles"
FCFLAGS="-O2"
FEATURES="assume-digests binpkg-logs buildpkg config-protect-if-modified distcc distlocks ebuild-locks fixlafiles merge-sync multilib-strict news parallel-fetch preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr"
FFLAGS="-O2"
GENTOO_MIRRORS="http://distfiles.gentoo.org"
LANG="en_US.utf-8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
MAKEOPTS="-j16"
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="X a52 aac acl alsa arm64 berkdb bidi bluetooth branding bzip2 cdda cdio cli consolekit crypt cups cxx dbus djvu dri dts exif ffmpeg flac fortran freetype gdbm gif gnutls httpd iconv icu ipv6 java jpeg live lua mad matroska modules mp3 mp4 mpeg multilib ncurses networkmanager nls nptl ogg oggvorbis openmp opus pam pcre pdf png policykit postscript pulseaudio python readline ssl stream svg tcpd theora tiff truetype udev udisks unicode upower v4l vcd vdpau vlm wifi wxwindows xattr xv zlib" 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_ARM="edsp neon thumb vfp vfpv3 vfpv4 vfp-d32 aes sha1 sha2 crc32 v4 v5 v6 v7 v8 thumb2" 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="libinput" 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="php5-6 php7-0" POSTGRES_TARGETS="postgres9_5" PYTHON_SINGLE_TARGET="python3_5" PYTHON_TARGETS="python2_7 python3_5" RUBY_TARGETS="ruby21 ruby22" USERLAND="GNU" 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, LC_ALL, LINGUAS, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS

=================================================================
                        Package Settings
=================================================================

x11-misc/redshift-1.11-r1::gentoo was built with the following:
USE="geoclue gtk nls (-appindicator)" PYTHON_TARGETS="python3_4 (-python3_5) (-python3_6)"