You can post emerge --info and /var/tmp/portage/net-misc/dhcpcd-6.11.5/work/dhcpcd-6.11.5/config.log file with wgetpaste ?
Okay, here is the emerge --info
Portage 2.3.24 (python 3.5.4-final-0, hardened/linux/amd64, gcc-5.4.0, glibc-2.25-r10, 4.9.76-gentoo-r1-gnu x86_64 ...