>>> Configuring source in /var/tmp/portage/sys-libs/zlib-1.2.10/work/zlib-1.2.10 ... * abi_x86_32.x86: running multilib-minimal_abi_src_configure /var/tmp/portage/sys-libs/zlib-1.2.10/work/zlib-1.2.10/configure --shared --pref ix=/usr --libdir=/usr/lib32 --uname=linux Using ar Compiler error reporting is too harsh for /var/tmp/portage/sys-libs/zlib-1.2.10/ work/zlib-1.2.10/configure (perhaps remove -Werror).
you must provide `emerge --info` and attach full build logs with every bug report. please do so here now.