1MAKEVER:=$(shell make --version | grep "Make [0-9]" | sed -E 's/.*Make ([0-9]).*/\1/')
 2
 3test1:
 4	# foo
 5	echo PASS
 6
 7test2: make$(MAKEVER)
 8
 9make4:
10	# foo  \
11echo PASS
12
13make3:
14	# foo  \
15	echo PASS
16
17test3: $(shell echo foo #)
18
19test4:
20	echo $(shell echo OK # FAIL \
21	FAIL2)
22
23test5:
24	echo $(shell echo $$(echo PASS))
25
26foo:
27	echo OK