1# http://www.gnu.org/software/make/manual/make.html#Multi_002dLine
 2# Note: in make 4.x
 3# define name =
 4# ...
 5# endef
 6#
 7# but in make 3.x
 8# define name
 9# ...
10# endef
11# i.e. no = needed after name.
12# make 3.x defines "name =" for make 4.x example.
13# TODO: should we provide flag to specify gnu make version?
14# note: in make 4.x, there is `undefine`.
15
16define two-lines
17echo foo
18echo $(bar)
19endef
20
21bar = xxx
22
23test:
24	echo BEGIN $(two-lines) END