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

Calculating dependencies  ... done!
[ebuild  N     ] sys-apps/policycoreutils-2.7::gentoo  USE="pam -audit -dbus" PYTHON_TARGETS="python2_7 python3_5 -python3_4 -python3_6" 0 KiB

Total: 1 package (1 new), Size of downloads: 0 KiB

>>> Verifying ebuild manifests


>>> Emerging (1 of 1) sys-apps/policycoreutils-2.7::gentoo
 * policycoreutils-2.7.tar.gz BLAKE2B SHA512 size ;-) ...                [ ok ]
 * policycoreutils-extra-1.36.tar.bz2 BLAKE2B SHA512 size ;-) ...        [ ok ]
>>> Unpacking source...
>>> Unpacking policycoreutils-2.7.tar.gz to /var/tmp/portage/sys-apps/policycoreutils-2.7/work
>>> Unpacking policycoreutils-extra-1.36.tar.bz2 to /var/tmp/portage/sys-apps/policycoreutils-2.7/work
>>> Source unpacked in /var/tmp/portage/sys-apps/policycoreutils-2.7/work
>>> Preparing source in /var/tmp/portage/sys-apps/policycoreutils-2.7/work/policycoreutils-2.7 ...
 * Applying policycoreutils-2.7-0001-newrole-not-suid.patch ...
 [ ok ]
 * Will copy sources from /var/tmp/portage/sys-apps/policycoreutils-2.7/work/policycoreutils-2.7
 * python2_7: copying to /var/tmp/portage/sys-apps/policycoreutils-2.7/work/policycoreutils-2.7-python2_7
 * python3_5: copying to /var/tmp/portage/sys-apps/policycoreutils-2.7/work/policycoreutils-2.7-python3_5
 * Will copy sources from /var/tmp/portage/sys-apps/policycoreutils-2.7/work/policycoreutils-extra
 * python2_7: copying to /var/tmp/portage/sys-apps/policycoreutils-2.7/work/policycoreutils-extra-python2_7
 * python3_5: copying to /var/tmp/portage/sys-apps/policycoreutils-2.7/work/policycoreutils-extra-python3_5
>>> Source prepared.
>>> Configuring source in /var/tmp/portage/sys-apps/policycoreutils-2.7/work/policycoreutils-extra ...
>>> Source configured.
>>> Compiling source in /var/tmp/portage/sys-apps/policycoreutils-2.7/work/policycoreutils-extra ...
 * python2_7: running building
make -j4 -C /var/tmp/portage/sys-apps/policycoreutils-2.7/work/policycoreutils-2.7-python2_7 AUDIT_LOG_PRIVS=y AUDITH=n PAMH=y INOTIFYH=n SESANDBOX=n CC=x86_64-pc-linux-gnu-gcc PYLIBVER=python2.7 LIBDIR=$(PREFIX)/lib64 
make: Entering directory '/var/tmp/portage/sys-apps/policycoreutils-2.7/work/policycoreutils-2.7-python2_7'
make[1]: Entering directory '/var/tmp/portage/sys-apps/policycoreutils-2.7/work/policycoreutils-2.7-python2_7/setfiles'
x86_64-pc-linux-gnu-gcc -march=core2 -O2 -pipe -D_FORTIFY_SOURCE=2 -fstack-protector-all -fstack-check -ffunction-sections -fdata-sections -fno-plt -mindirect-branch=thunk -mfunction-return=thunk -fomit-frame-pointer -fgcse-sm -fmodulo-sched -fmodulo-sched-allow-regmoves -ftree-loop-distribution -fivopts -fopenmp   -c -o setfiles.o setfiles.c
x86_64-pc-linux-gnu-gcc -march=core2 -O2 -pipe -D_FORTIFY_SOURCE=2 -fstack-protector-all -fstack-check -ffunction-sections -fdata-sections -fno-plt -mindirect-branch=thunk -mfunction-return=thunk -fomit-frame-pointer -fgcse-sm -fmodulo-sched -fmodulo-sched-allow-regmoves -ftree-loop-distribution -fivopts -fopenmp   -c -o restore.o restore.c
x86_64-pc-linux-gnu-gcc -march=core2 -O2 -pipe -D_FORTIFY_SOURCE=2 -fstack-protector-all -fstack-check -ffunction-sections -fdata-sections -fno-plt -mindirect-branch=thunk -mfunction-return=thunk -fomit-frame-pointer -fgcse-sm -fmodulo-sched -fmodulo-sched-allow-regmoves -ftree-loop-distribution -fivopts -fopenmp   -c -o restorecon_xattr.o restorecon_xattr.c
x86_64-pc-linux-gnu-gcc: error: unrecognized command line option '-mindirect-branch=thunk'; did you mean '-Windirect-static'?
x86_64-pc-linux-gnu-gcc: error: unrecognized command line option '-mindirect-branch=thunk'; did you mean '-Windirect-static'?
x86_64-pc-linux-gnu-gcc: error: unrecognized command line option '-mindirect-branch=thunk'; did you mean '-Windirect-static'?
x86_64-pc-linux-gnu-gcc: error: unrecognized command line option '-mfunction-return=thunk'; did you mean '-Wfunction-elimination'?
make[1]: *** [<builtin>: restorecon_xattr.o] Error 1
make[1]: *** Waiting for unfinished jobs....
x86_64-pc-linux-gnu-gcc: error: unrecognized command line option '-mfunction-return=thunk'; did you mean '-Wfunction-elimination'?
x86_64-pc-linux-gnu-gcc: error: unrecognized command line option '-mfunction-return=thunk'; did you mean '-Wfunction-elimination'?
make[1]: *** [<builtin>: setfiles.o] Error 1
make[1]: *** [<builtin>: restore.o] Error 1
make[1]: Leaving directory '/var/tmp/portage/sys-apps/policycoreutils-2.7/work/policycoreutils-2.7-python2_7/setfiles'
make: *** [Makefile:4: all] Error 1
make: Leaving directory '/var/tmp/portage/sys-apps/policycoreutils-2.7/work/policycoreutils-2.7-python2_7'
 * ERROR: sys-apps/policycoreutils-2.7::gentoo failed (compile phase):
 *   emake failed
 * 
 * If you need support, post the output of `emerge --info '=sys-apps/policycoreutils-2.7::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=sys-apps/policycoreutils-2.7::gentoo'`.
 * The complete build log is located at '/var/tmp/portage/sys-apps/policycoreutils-2.7/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/sys-apps/policycoreutils-2.7/temp/environment'.
 * Working directory: '/var/tmp/portage/sys-apps/policycoreutils-2.7/work/policycoreutils-extra'
 * S: '/var/tmp/portage/sys-apps/policycoreutils-2.7/work/policycoreutils-2.7'

>>> Failed to emerge sys-apps/policycoreutils-2.7, Log file:

>>>  '/var/tmp/portage/sys-apps/policycoreutils-2.7/temp/build.log'
 * Messages for package sys-apps/policycoreutils-2.7:
 * ERROR: sys-apps/policycoreutils-2.7::gentoo failed (compile phase):
 *   emake failed
 * 
 * If you need support, post the output of `emerge --info '=sys-apps/policycoreutils-2.7::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=sys-apps/policycoreutils-2.7::gentoo'`.
 * The complete build log is located at '/var/tmp/portage/sys-apps/policycoreutils-2.7/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/sys-apps/policycoreutils-2.7/temp/environment'.
 * Working directory: '/var/tmp/portage/sys-apps/policycoreutils-2.7/work/policycoreutils-extra'
 * S: '/var/tmp/portage/sys-apps/policycoreutils-2.7/work/policycoreutils-2.7'