3 $description = "Test BSD-style shell assignments (VAR != VAL) for variables.";
7 # TEST 0: Basic shell assignment (!=).
12 demo1!=printf \' 1 2 3\n4\n\n5 \n \n 6\n\n\n\n\'
13 demo2 != printf \'7 8\n \'
14 demo3 != printf \'$$(demo2)\'
15 demo4 != printf \' 2 3 \n\'
16 demo5 != printf \' 2 3 \n\n\'
17 all: ; @echo "<$(demo1)> <$(demo2)> <$(demo3)> <$(demo4)> <${demo5}>"
19 '', "< 1 2 3 4 5 6 > <7 8 > <7 8 > < 2 3 > < 2 3 >\n");
21 # TEST 1: Handle '#' the same way as BSD make
25 hash != printf \'\043\'
26 foo2!= echo "bar$(hash)baz"
28 all: ; @echo "<$(foo1)> <$(hash)> <$(foo2)>"
30 '', "<bar> <#> <bar#baz>\n");
32 # TEST 2: shell assignment variables (from !=) should be recursive.
33 # Note that variables are re-evaluated later, so the shell can output
34 # a value like $(XYZZY) as part of !=. The $(XYZZY) will be EVALUATED
35 # when the value containing it is evaluated. On the negative side, this
36 # means if you don't want this, you need to escape dollar signs as $$.
37 # On the positive side, it means that shell programs can output macros
38 # that are then evaluated as they are traditionally evaluated.. and that
39 # you can use traditional macro evaluation semantics to implement !=.
42 XYZZY = fiddle-dee-dee
44 VAR3 != printf \'%s\' \'$(dollar)(XYZZY)\'
46 all: ; @echo "<$(VAR3)>"
48 '', "<fiddle-dee-dee>\n");
51 # TEST 3: Overrides invoke shell anyway; they just don't store the result
52 # in a way that is visible.
56 override != echo abc > ,abc ; cat ,abc
58 all: ; @echo "<$(override)>" ; cat ,abc
60 'override=xyz', "<xyz>\nabc\n");