at_least=3.80 ifeq ($(MACHTYPE),i370-ibm-mvs) at_least=3.79.1 endif ifeq ($(PLATFORM),OS390) at_least=3.79.1 endif ifeq ($(MACHTYPE),powerpc-ibm-os400) at_least=3.77 endif
latest_a=$(firstword $(sort $(MAKE_VERSION) $(at_least)))
ifneq ($(at_least),$(latest_a)) err: @echo "ERROR: $(MAKE_VERSION) - too old, please upgrade to at least $(at_least)" @false else ok: @echo "$(MAKE_VERSION) (we wanted at least $(at_least))" endif