michael@0: unknown var = uval
michael@0: 
michael@0: all:
michael@0: 	test "$(subst a,b,value)" = "vblue"
michael@0: 	test "${subst a,b,va)lue}" = "vb)lue"
michael@0: 	test "$(subst /,\,ab/c)" = "ab\c"
michael@0: 	test '$(subst a,b,\\#)' = '\\#'
michael@0: 	test "$( subst a,b,value)" = ""
michael@0: 	test "$(Subst a,b,value)" = ""
michael@0: 	test "$(unknown var)" = "uval"
michael@0: 	@echo TEST-PASS