Please, report appropriately at bugs.gentoo.com. Remember:
* If you need support, post the output of `emerge --info '=sys-libs/glibc-2.23-r3::gentoo'`, * the complete build log and the output of `emerge -pqv '=sys-libs/glibc-2.23-r3::gentoo'`. * The complete build log is located at '/var/tmp/portage/sys-libs/glibc-2.23-r3/temp/build.log'. * The ebuild environment file is located at '/var/tmp/portage/sys-libs/glibc-2.23-r3/temp/environment'. Best regards