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