michael@0: $(shell \
michael@0: if ! test -f include-dynamic.inc; then \
michael@0:   echo "TESTVAR = oldval" > include-dynamic.inc; \
michael@0:   sleep 2; \
michael@0:   echo "TESTVAR = newval" > include-dynamic.inc.in; \
michael@0: fi \
michael@0: )
michael@0: 
michael@0: # before running the 'all' rule, we should be rebuilding include-dynamic.inc,
michael@0: # because there is a rule to do so
michael@0: 
michael@0: all:
michael@0: 	test $(TESTVAR) = newval
michael@0: 	test "$(MAKE_RESTARTS)" = 1
michael@0: 	@echo TEST-PASS
michael@0: 
michael@0: include-dynamic.inc: include-dynamic.inc.in
michael@0: 	test "$(MAKE_RESTARTS)" = ""
michael@0: 	cp $< $@
michael@0: 
michael@0: include include-dynamic.inc