meta/recipes-devtools/gcc/gcc-shared-source.inc

do_fetch() {
	:
}
do_fetch[noexec] = "1"
deltask do_unpack
deltask do_patch

do_configure[depends] += "gcc-source-${PV}:do_preconfigure"
do_populate_lic[depends] += "gcc-source-${PV}:do_unpack"