#                                                                    -*-perl-*-

$description = "Test various flavors of conditional variable setting.";

$details = "";

# Test ?=

run_make_test(q!
x = bar
y = baz
foo ?= $(x)
biz?=$(y)
x = 10
y = 20
all:;@: $(info foo=$(foo) biz=$(biz))
!,
              '', "foo=10 biz=20");

run_make_test(q!
foo=1
biz=2
x = bar
y = baz
foo ?= $(x)
biz?=$(y)
x = 10
y = 20
all:;@: $(info foo=$(foo) biz=$(biz))
!,
              '', "foo=1 biz=2");

# Test ?:=

run_make_test(q!
x = bar
y = baz
foo ?:= $(x)
biz?:=$(y)
x = 10
y = 20
all:;@: $(info foo=$(foo) biz=$(biz))
!,
              '', "foo=bar biz=baz");

run_make_test(q!
foo=1
biz=2
x = bar
y = baz
foo ?:= $(x)$(info expanded)
biz?:=$(y)$(info expanded)
x = 10
y = 20
all:;@: $(info foo=$(foo) biz=$(biz))
!,
              '', "foo=1 biz=2");

# Test ?::=

run_make_test(q!
x = bar
y = baz
foo ?::= $(x)
biz?::=$(y)
x = 10
y = 20
all:;@: $(info foo=$(foo) biz=$(biz))
!,
              '', "foo=bar biz=baz");

run_make_test(q!
foo=1
biz=2
x = bar
y = baz
foo ?::= $(x)$(info expanded)
biz?::=$(y)$(info expanded)
x = 10
y = 20
all:;@: $(info foo=$(foo) biz=$(biz))
!,
              '', "foo=1 biz=2");

# Test ?:::=

run_make_test(q!
x = bar
y = baz
foo ?:::= $(x)
biz?:::=$(y)
x = 10
y = 20
all:;@: $(info foo=$(foo) biz=$(biz))
!,
              '', "foo=bar biz=baz");

run_make_test(q!
foo=1
biz=2
x = bar
y = baz
foo ?:::= $(x)$(info expanded)
biz?:::=$(y)$(info expanded)
x = 10
y = 20
all:;@: $(info foo=$(foo) biz=$(biz))
!,
              '', "foo=1 biz=2");

# Test ?!=

run_make_test(q/
x = bar
y = baz
foo ?!= echo $(x)
biz?!=echo $(y)
x = 10
y = 20
all:;@: $(info foo=$(foo) biz=$(biz))
/,
              '', "foo=bar biz=baz");

run_make_test(q/
foo=1
biz=2
x = bar
y = baz
foo ?!= echo $(x)$(info expanded)
biz?!=echo $(y)$(info expanded)
x = 10
y = 20
all:;@: $(info foo=$(foo) biz=$(biz))
/,
              '', "foo=1 biz=2");

1;