/etc/portage/make.conf for my gentoo machine

make.conf

# These settings were set by the catalyst build script that automatically
# built this stage.
# Please consult /usr/share/portage/config/make.conf.example for a more
# detailed example.
CFLAGS="-O2 -pipe -march=haswell -mabm"
CXXFLAGS="${CFLAGS}"
# WARNING: Changing your CHOST is not something that should be done lightly.
# Please consult http://www.gentoo.org/doc/en/change-chost.xml before changing.
CHOST="x86_64-pc-linux-gnu"
# These are the USE flags that were used in addition to what is provided by the
# profile used for building.
USE="mmx sse sse2 ssse3 sse4_1 sse4_2 zsh-completion bash-completion ipv6 truetype png jpeg threads -gnome-keyring -vdpau -vaapi -consolekit"
CPU_FLAGS_X86="aes avx avx2 fma3 mmx mmxext popcnt sse sse2 sse3 sse4_1 sse4_2 ssse3"
PORTDIR="/usr/portage"
DISTDIR="${PORTDIR}/distfiles"
PKGDIR="${PORTDIR}/packages"

GRUB_PLATFORMS="pcs efi-64"
VIDEO_CARDS="intel nvidia"
#SANE_BACKENDS="xerox_mfp plustek canon gt68xx"
INPUT_DEVICES="evdev keyboard mouse synaptics wacom joystick"

QEMU_SOFTMMU_TARGETS="arm x86_64"
QEMU_USER_TARGETS="arm"

LINGUAS="en en_US en_GB de"

MAKEOPTS="-j7 -l7"
EMERGE_DEFAULT_OPTS="--with-bdeps=y --jobs=7 --load-average=7"
ACCEPT_LICENSE="openssl"

POLICY_TYPES="strict targeted mcs"

source /var/lib/layman/make.conf
PORTDIR_OVERLAY="/usr/local/portage/ ${PORTDIR_OVERLAY}"