As a comment to the previous ebuild: The following lines are no more needed: sed -i \ -e 's:^CFLAGS=.*::' \ -e 's:^CXXFLAGS=.*::' \ -e 's:-mcpu=$host_cpu::' \ -e 's:-mtune=$host_cpu::' \ -e 's:-ffast-math -fno-exceptions -fsigned-char::' \ configure \ || die "sed failed" filter-flags -fno-...