1var1 = $($(bar))
 2var2 = $$(bar)
 3var3 := $($(bar))
 4var4 := $$(bar)
 5
 6D=$$
 7O=(
 8C=)
 9
10# expects
11#  foo
12#  $(bar)
13#
14#  $(bar)
15#  $(bar)
16test:
17	echo '$(var1)'
18	echo '$(var2)'
19	echo '$(var3)'
20	echo '$(var4)'
21	echo '$D$Obar$C'
22
23bar = foo
24foo = foo
25