function cmerge() {
	...
	# $ARCH == "powerpc"
	ARCH=$(echo ${CTARGET} | cut -d '-' -f 1)
	...
	# $USE == "powerpc ${USE_SAVE}"
	USE="${ARCH} ${USE_SAVE}"
	case ${ARCH} in
		...
		# $ARCH == "ppc"
		powerpc) ARCH=ppc;;
		...
	esac
	# $ACCEPT_KEYWORDS == "ppc"
	ACCEPT_KEYWORDS="${ARCH}"

	# $USE == "-* ppc powerpc ${USE_SAVE} elibc_${ELIBC} multicall make-symlinks"
	USE="-* ${ARCH} ${USE} elibc_${ELIBC} multicall make-symlinks"

	export ARCH ACCEPT_KEYWORDS CFLAGS CXXFLAGS LDFLAGS ROOT CBUILD CHOST CTARGET CC CXX PKGDIR USE
	...
}