78a5f22994
We rely on gnu make, so we can expect the jobserver to be around in parallel builds, too. Avoids some make warnings and slightly speeds up the build if those sub-makes are executed (eg for arm-trusted-firmware and vboot). Change-Id: I0e6a77f2813f7453d53e88e0214ad8c1b8689042 Signed-off-by: Patrick Georgi <pgeorgi@google.com> Reviewed-on: https://review.coreboot.org/18263 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Martin Roth <martinroth@google.com>