tests/scripts/features/se_implicit - make - Git at Google

 #                                                                    -*-perl-*-
 $description = "Test second expansion in implicit rules.";

 $details = "";

 use Cwd;

 $dir = cwd;
 $dir =~ s,.*/([^/]+)$,../$1,;


 # Test #1: automatic variables.
 #
 run_make_test(q!
 .SECONDEXPANSION:
 .DEFAULT: ; @echo '$@'

 foo.a: bar baz

 foo.a: biz | buz

 foo.%: 1.$$@ \
        2.$$< \
        $$(addprefix 3.,$$^) \
        $$(addprefix 4.,$$+) \
        5.$$| \
        6.$$* ; @:

 1.foo.a \
 2.bar \
 3.bar \
 3.baz \
 3.biz \
 4.bar \
 4.baz \
 4.biz \
 5.buz \
 6.a: ; @echo '$@'

 !,
 '',
 '1.foo.a
 2.bar
 3.bar
 3.baz
 3.biz
 4.bar
 4.baz
 4.biz
 5.buz
 6.a
 bar
 baz
 biz
 buz
 ');


 # Test #2: target/pattern -specific variables.
 #
 run_make_test(q!
 .SECONDEXPANSION:
 foo.x:

 foo.%: $$(%_a) $$(%_b) bar ; @:

 foo.x: x_a := bar

 %.x: x_b := baz

 bar baz: ; @echo '$@'
 !,
               '', "bar\nbaz\n");


 # Test #3: order of prerequisites.
 #
 run_make_test(q!
 .SECONDEXPANSION:
 .DEFAULT: ; @echo '$@'

 all: foo bar baz


 # Subtest #1
 #
 %oo: %oo.1; @:

 foo: foo.2

 foo: foo.3

 foo.1: ; @echo '$@'


 # Subtest #2
 #
 bar: bar.2

 %ar: %ar.1; @:

 bar: bar.3

 bar.1: ; @echo '$@'


 # Subtest #3
 #
 baz: baz.1

 baz: baz.2

 %az: ; @:
 !,
               '',
 'foo.1
 foo.2
 foo.3
 bar.1
 bar.2
 bar.3
 baz.1
 baz.2
 ');


 # Test #4: stem splitting logic.
 #
 run_make_test(q!
 .SECONDEXPANSION:
 $(dir)/tmp/bar.o:

 $(dir)/tmp/foo/bar.c: ; @echo '$@'
 $(dir)/tmp/bar/bar.c: ; @echo '$@'
 foo.h: ; @echo '$@'

 %.o: $$(addsuffix /%.c,foo bar) foo.h ; @echo '$@: {$<} $^'
 !,
               "dir=$dir", "$dir/tmp/foo/bar.c
 $dir/tmp/bar/bar.c
 foo.h
 $dir/tmp/bar.o: {$dir/tmp/foo/bar.c} $dir/tmp/foo/bar.c $dir/tmp/bar/bar.c foo.h
 ");


 # Test #5: stem splitting logic and order-only prerequisites.
 #
 run_make_test(q!
 .SECONDEXPANSION:
 $(dir)/tmp/foo.o: $(dir)/tmp/foo.c
 $(dir)/tmp/foo.c: ; @echo '$@'
 bar.h: ; @echo '$@'

 %.o: %.c|bar.h ; @echo '$@: {$<} {$|} $^'

 !,
               "dir=$dir", "$dir/tmp/foo.c
 bar.h
 $dir/tmp/foo.o: {$dir/tmp/foo.c} {bar.h} $dir/tmp/foo.c
 ");


 # Test #6: lack of implicit prerequisites.
 #
 run_make_test(q!
 .SECONDEXPANSION:
 foo.o: foo.c
 foo.c: ; @echo '$@'

 %.o: ; @echo '$@: {$<} $^'
 !,
               '', "foo.c\nfoo.o: {foo.c} foo.c\n");


 # Test #7: Test stem from the middle of the name.
 #
 run_make_test(q!
 .SECONDEXPANSION:
 foobarbaz:

 foo%baz: % $$*.1 ; @echo '$*'

 bar bar.1: ; @echo '$@'
 !,
               '', "bar\nbar.1\nbar\n");


 # Test #8: Make sure stem triple-expansion does not happen.
 #
 run_make_test(q!
 .SECONDEXPANSION:
 foo$$bar:

 f%r: % $$*.1 ; @echo '$*'

 oo$$ba oo$$ba.1: ; @echo '$@'
 !,
               '', 'oo$ba
 oo$ba.1
 oo$ba
 ');

 # Test #9: Check the value of $^
 run_make_test(q!
 .SECONDEXPANSION:

 %.so: | $$(extra) ; @echo $^

 foo.so: extra := foo.o
 foo.so:
 foo.o:
 !,
               '', "\n");

 # Test #10: Test second expansion with second expansion prerequisites
 # Ensures pattern_search() recurses with SE prereqs.
 touch('a');
 run_make_test(q!
 .SECONDEXPANSION:
 sim_base_rgg := just_a_name
 sim_base_src := a
 sim_base_f := a a a
 sim_%.f: $${sim_$$*_f} ; echo $@
 sim_%.src: $${sim_$$*_src} ; echo $@
 sim_%: \
         $$(if $$(sim_$$*_src),sim_%.src) \
         $$(if $$(sim_$$*_f),sim_%.f) \
         $$(if $$(sim_$$*_rgg),$$(sim_$$*_rgg).s) ; echo $@
 !,
               '-s sim_base', "#MAKE#: *** No rule to make target 'sim_base'.  Stop.", 512);

 unlink('a');

 # Ensure that order-only tokens embedded in second expansions are parsed
 run_make_test(q!
 .SECONDEXPANSION:
 PREREQS=p1|p2
 P2=p2
 all : foo bar
 f%o: $$(PREREQS) ; @echo '$@' from '$^' and '$|'
 b%r: p1|$$(P2)   ; @echo '$@' from '$^' and '$|'
 p% : ; : $@
 !,
               "", ": p1\n: p2\nfoo from p1 and p2\nbar from p1 and p2\n");

 # SV 28456 : Don't reset $$< for default recipes
 run_make_test(q!
 .SECONDEXPANSION:

 .PHONY: foo bar
 foo: bar
 foo: $$(info $$<)
 %oo: ;
 !,
               '', "bar\n#MAKE#: Nothing to be done for 'foo'.\n");

 # SV 54161: Expand $$* properly when it contains a path

 run_make_test(q!
 .SECONDEXPANSION:
 %x: $$(info $$*); @echo '$*'
 !,
               'q/ux', "q/u\nq/u\n");


 # sv 60188.
 # Test that a file explicitly mentioned by the user and made by an implicit
 # rule is not considered intermediate.

 touch('hello.z');

 # subtest 1.
 # hello.x is derived from the stem and thus is an intermediate file.
 run_make_test(q!
 .SECONDEXPANSION:
 dep:=.x
 all: hello.z
 %.z: %$$(dep) ; @echo $@
 %.x: ;
 !, '', "#MAKE#: Nothing to be done for 'all'.\n");


 # subtest 2.
 # test.x is explicitly mentioned and thus is not an intermediate file.
 run_make_test(q!
 .SECONDEXPANSION:
 dep:=test.x
 all: hello.z
 %.z: %.x $$(dep) ; @echo $@
 %.x: ;
 !, '', "hello.z\n");

 # subtest 3.
 # make is building hello.z and does not second expand the prerequisites of rule
 # 'unrelated: $$(dep)'. '$$(dep)' stays not expanded and 'hello.x' is never
 # entered to the database. Make considers 'hello.x' intermediate while building
 # 'hello.z'. Because 'hello.z' is present and 'hello.x' is missing and
 # 'hello.x' is intermediate, there is no need to rebuild 'hello.z'.
 run_make_test(q!
 .SECONDEXPANSION:
 dep:=hello.x
 all: hello.z
 %.z: %.x; @echo $@
 %.x: ;
 unrelated: $$(dep)
 !, '', "#MAKE#: Nothing to be done for 'all'.\n");

 # subtest 4.
 # Just like subtest 3. $$(dep) is not second expanded. 'hello.x' is
 # intermediate.
 run_make_test(q!
 .SECONDEXPANSION:
 dep:=hello.x
 all: hello.z
 %.z: %.x; @echo $@
 %.x: ;
 %.q: $$(dep)
 !, '', "#MAKE#: Nothing to be done for 'all'.\n");

 unlink('hello.z');


 # sv 60188.
 # Test that a file explicitly mentioned by the user and made by an implicit
 # rule is not considered intermediate, even when the builtin rules are used.

 touch('hello.x');
 touch('hello.tsk');

 # subtest 1.
 # hello.z is explicitly mentioned and thus is not an intermediate file.
 run_make_test(q!
 .SECONDEXPANSION:
 dep:=hello.z
 all: hello.tsk
 %.tsk: $$(dep) ; @echo $@
 %.z : %.x ; @echo $@
 !, '', "hello.z\nhello.tsk");

 # subtest 2.
 # hello.z is derived from the stem and thus is an intermediate file.
 run_make_test(q!
 .SECONDEXPANSION:
 dep:=.z
 all: hello.tsk
 %.tsk: %$$(dep) ; @echo $@
 %.z : %.x ; @echo $@
 !, '', "#MAKE#: Nothing to be done for 'all'.\n");

 unlink('hello.x');
 unlink('hello.tsk');


 # sv 60659. Second expansion of automatic variables inside a function in the
 # prerequisite list.
 # $$@ expands to the target in the 1st and following rules.
 # $$* expands to the stem in the 1st and following rules.
 # $$<,$$^,$$+,$$|,$$?,$$% expand to the empty string in the prerequisite list
 # of the 1st rule.
 # $$<,$$^,$$+,$$|,$$?,$$% in the prerequisite list of the 2nd (and following)
 # rule expand to the values from the 1st rule.
 # $$% cannot be used in prerequisites, because in pattern rules % is
 # substituted for stem.


 # subtest 1. Pattern rules. 1st rule.
 run_make_test(q!
 .SECONDEXPANSION:
 all: 2.x
 %.x: 5.z 6.z 5.z $$(info @=$$@,<=$$<,^=$$^,+=$$+,|=$$|,?=$$?,*=$$*) ;
 %.z: ;
 !, '',
 "@=2.x,<=,^=,+=,|=,?=,*=2
 #MAKE#: Nothing to be done for 'all'.\n");


 # subtest 2. Pattern rules. 2nd rule.
 run_make_test(q!
 .SECONDEXPANSION:
 all: 2.x 1.x
 2.x: 5.z 6.z 5.z | 7.z 7.z 8.z
 1.x: 1.z 2.z 2.z | 3.z 4.z
 %.x: 9.z $$(info @=$$@,<=$$<,^=$$^,+=$$+,|=$$|,?=$$?,*=$$*) ;
 %.z: ;
 !, '',
 "@=2.x,<=5.z,^=5.z 6.z,+=5.z 6.z 5.z,|=7.z 8.z,?=,*=2
 @=1.x,<=1.z,^=1.z 2.z,+=1.z 2.z 2.z,|=3.z 4.z,?=,*=1
 #MAKE#: Nothing to be done for 'all'.\n");


 # subtest 3. Static pattern rules. 1st rule.
 run_make_test(q!
 .SECONDEXPANSION:
 all: 2.x
 2.x: %.x: 5.z 6.z 5.z $$(info @=$$@,<=$$<,^=$$^,+=$$+,|=$$|,?=$$?,*=$$*) ;
 %.z: ;
 !, '',
 "@=2.x,<=,^=,+=,|=,?=,*=2
 #MAKE#: Nothing to be done for 'all'.\n");


 # subtest 4. Static pattern rules. 2nd rule.
 run_make_test(q!
 .SECONDEXPANSION:
 all: 15.x 1.x
 15.x: 5.z 6.z 5.z | 7.z 7.z 8.z
 1.x: 1.z 2.z 2.z | 3.z 4.z
 15.x 1.x: %.x: 9.z $$(info @=$$@,<=$$<,^=$$^,+=$$+,|=$$|,?=$$?,*=$$*) ;
 %.z: ;
 !, '',
 "@=15.x,<=5.z,^=5.z 6.z,+=5.z 6.z 5.z,|=7.z 8.z,?=,*=15
 @=1.x,<=1.z,^=1.z 2.z,+=1.z 2.z 2.z,|=3.z 4.z,?=,*=1
 #MAKE#: Nothing to be done for 'all'.\n");


 # subtest 5. Grouped targets in implicit rules. 1st rule.
 run_make_test(q!
 .SECONDEXPANSION:
 all: 2.x
 %.x %.xx&: 5.z 6.z 5.z $$(info @=$$@,<=$$<,^=$$^,+=$$+,|=$$|,?=$$?,*=$$*) ;
 %.z: ;
 !, '',
 "@=2.x,<=,^=,+=,|=,?=,*=2
 #MAKE#: Nothing to be done for 'all'.\n");


 # subtest 6. Grouped targets in implicit rules. 2nd rule.
 run_make_test(q!
 .SECONDEXPANSION:
 all: 2.x 1.xx
 2.x: 5.z 6.z 5.z | 7.z 7.z 8.z
 1.xx: 1.z 2.z 2.z | 3.z 4.z
 %.x %.xx&: 9.z $$(info @=$$@,<=$$<,^=$$^,+=$$+,|=$$|,?=$$?,*=$$*) ;
 %.z: ;
 !, '',
 "@=2.x,<=5.z,^=5.z 6.z,+=5.z 6.z 5.z,|=7.z 8.z,?=,*=2
 @=1.xx,<=1.z,^=1.z 2.z,+=1.z 2.z 2.z,|=3.z 4.z,?=,*=1
 #MAKE#: Nothing to be done for 'all'.\n");


 # subtest 7. Double colon rule.
 run_make_test(q!
 .SECONDEXPANSION:
 all: 2.x
 %.x:: 5.z 6.z 5.z $$(info @=$$@,<=$$<,^=$$^,+=$$+,|=$$|,?=$$?,*=$$*) ;
 5.z 6.z: ;
 !, '',
 "@=2.x,<=,^=,+=,|=,?=,*=2
 #MAKE#: Nothing to be done for 'all'.\n");

 # sv 62324.
 # Integrity self check.
 run_make_test(q!
 .SECONDEXPANSION:
 all: bye.x
 %.x: $$(firstword %.1;
 !, '', "#MAKE#: *** unterminated call to function 'firstword': missing ')'.  Stop.", 512);

 # sv 62706.
 # Test that makes avoids second expanding prerequisites of the rules which are
 # not tried during implicit search.
 # Here, make tries rules '%.tsk: %.o' and '%.o' and their prerequisites are
 # second expanded.
 # Rules '%.bin: %.x' and '%.x:' are not used in implicit search for 'hello.tsk'
 # and 'hello.o' and their prerequisites are not expanded.
 run_make_test(q!
 .SECONDEXPANSION:
 %.bin: %.x $$(info second expansion of $$@ prereqs); $(info $@ from $<)
 %.tsk: %.o $$(info second expansion of $$@ prereqs); $(info $@ from $<)
 %.x: $$(info second expansion of $$@ prereqs); $(info $@)
 %.o: $$(info second expansion of $$@ prereqs); $(info $@)
 !, '-R hello.tsk',
 "second expansion of hello.o prereqs
 second expansion of hello.tsk prereqs
 hello.o
 hello.tsk from hello.o
 #MAKE#: 'hello.tsk' is up to date.\n");

 # sv 62706.
 # No side effects from second expansion of unrelated rules.
 run_make_test(q!
 .SECONDEXPANSION:
 all: hello.tsk
 %.tsk: %.o; exit 1
 hello.o:;
 %.q: $$(shell touch hello.1);
 !, '',
 "exit 1
 #MAKE#: *** [#MAKEFILE#:4: hello.tsk] Error 1\n", 512);

 # sv 62706.
 # Second expansion of intermediate prerequisites.
 # The rule to build hello.x is implicit.
 # Test that $$(deps) is secondary expanded.
 run_make_test(q!
 deps:=hello.h
 .SECONDEXPANSION:
 all: hello.tsk
 %.tsk: %.x; $(info $@)
 %.x: $$(deps); $(info $@)
 hello.h:; $(info $@)
 !, '', "hello.h\nhello.x\nhello.tsk\n#MAKE#: Nothing to be done for 'all'.\n");

 # This tells the test driver that the perl test script executed properly.
 1;
	# --perl--
	$description = "Test second expansion in implicit rules.";

	$details = "";

	use Cwd;

	$dir = cwd;
	$dir =~ s,.*/([^/]+)$,../$1,;


	# Test #1: automatic variables.
	#
	run_make_test(q!
	.SECONDEXPANSION:
	.DEFAULT: ; @echo '$@'

	foo.a: bar baz

	foo.a: biz \| buz

	foo.%: 1.$$@ \
	2.$$< \
	$$(addprefix 3.,$$^) \
	$$(addprefix 4.,$$+) \
	5.$$\| \
	6.$$* ; @:

	1.foo.a \
	2.bar \
	3.bar \
	3.baz \
	3.biz \
	4.bar \
	4.baz \
	4.biz \
	5.buz \
	6.a: ; @echo '$@'

	!,
	'',
	'1.foo.a
	2.bar
	3.bar
	3.baz
	3.biz
	4.bar
	4.baz
	4.biz
	5.buz
	6.a
	bar
	baz
	biz
	buz
	');


	# Test #2: target/pattern -specific variables.
	#
	run_make_test(q!
	.SECONDEXPANSION:
	foo.x:

	foo.%: $$(%_a) $$(%_b) bar ; @:

	foo.x: x_a := bar

	%.x: x_b := baz

	bar baz: ; @echo '$@'
	!,
	'', "bar\nbaz\n");


	# Test #3: order of prerequisites.
	#
	run_make_test(q!
	.SECONDEXPANSION:
	.DEFAULT: ; @echo '$@'

	all: foo bar baz


	# Subtest #1
	#
	%oo: %oo.1; @:

	foo: foo.2

	foo: foo.3

	foo.1: ; @echo '$@'


	# Subtest #2
	#
	bar: bar.2

	%ar: %ar.1; @:

	bar: bar.3

	bar.1: ; @echo '$@'


	# Subtest #3
	#
	baz: baz.1

	baz: baz.2

	%az: ; @:
	!,
	'',
	'foo.1
	foo.2
	foo.3
	bar.1
	bar.2
	bar.3
	baz.1
	baz.2
	');


	# Test #4: stem splitting logic.
	#
	run_make_test(q!
	.SECONDEXPANSION:
	$(dir)/tmp/bar.o:

	$(dir)/tmp/foo/bar.c: ; @echo '$@'
	$(dir)/tmp/bar/bar.c: ; @echo '$@'
	foo.h: ; @echo '$@'

	%.o: $$(addsuffix /%.c,foo bar) foo.h ; @echo '$@: {$<} $^'
	!,
	"dir=$dir", "$dir/tmp/foo/bar.c
	$dir/tmp/bar/bar.c
	foo.h
	$dir/tmp/bar.o: {$dir/tmp/foo/bar.c} $dir/tmp/foo/bar.c $dir/tmp/bar/bar.c foo.h
	");


	# Test #5: stem splitting logic and order-only prerequisites.
	#
	run_make_test(q!
	.SECONDEXPANSION:
	$(dir)/tmp/foo.o: $(dir)/tmp/foo.c
	$(dir)/tmp/foo.c: ; @echo '$@'
	bar.h: ; @echo '$@'

	%.o: %.c\|bar.h ; @echo '$@: {$<} {$\|} $^'

	!,
	"dir=$dir", "$dir/tmp/foo.c
	bar.h
	$dir/tmp/foo.o: {$dir/tmp/foo.c} {bar.h} $dir/tmp/foo.c
	");


	# Test #6: lack of implicit prerequisites.
	#
	run_make_test(q!
	.SECONDEXPANSION:
	foo.o: foo.c
	foo.c: ; @echo '$@'

	%.o: ; @echo '$@: {$<} $^'
	!,
	'', "foo.c\nfoo.o: {foo.c} foo.c\n");


	# Test #7: Test stem from the middle of the name.
	#
	run_make_test(q!
	.SECONDEXPANSION:
	foobarbaz:

	foo%baz: % $$.1 ; @echo '$'

	bar bar.1: ; @echo '$@'
	!,
	'', "bar\nbar.1\nbar\n");


	# Test #8: Make sure stem triple-expansion does not happen.
	#
	run_make_test(q!
	.SECONDEXPANSION:
	foo$$bar:

	f%r: % $$.1 ; @echo '$'

	oo$$ba oo$$ba.1: ; @echo '$@'
	!,
	'', 'oo$ba
	oo$ba.1
	oo$ba
	');

	# Test #9: Check the value of $^
	run_make_test(q!
	.SECONDEXPANSION:

	%.so: \| $$(extra) ; @echo $^

	foo.so: extra := foo.o
	foo.so:
	foo.o:
	!,
	'', "\n");

	# Test #10: Test second expansion with second expansion prerequisites
	# Ensures pattern_search() recurses with SE prereqs.
	touch('a');
	run_make_test(q!
	.SECONDEXPANSION:
	sim_base_rgg := just_a_name
	sim_base_src := a
	sim_base_f := a a a
	sim_%.f: $${sim_$$*_f} ; echo $@
	sim_%.src: $${sim_$$*_src} ; echo $@
	sim_%: \
	$$(if $$(sim_$$*_src),sim_%.src) \
	$$(if $$(sim_$$*_f),sim_%.f) \
	$$(if $$(sim_$$_rgg),$$(sim_$$_rgg).s) ; echo $@
	!,
	'-s sim_base', "#MAKE#: *** No rule to make target 'sim_base'. Stop.", 512);

	unlink('a');

	# Ensure that order-only tokens embedded in second expansions are parsed
	run_make_test(q!
	.SECONDEXPANSION:
	PREREQS=p1\|p2
	P2=p2
	all : foo bar
	f%o: $$(PREREQS) ; @echo '$@' from '$^' and '$\|'
	b%r: p1\|$$(P2) ; @echo '$@' from '$^' and '$\|'
	p% : ; : $@
	!,
	"", ": p1\n: p2\nfoo from p1 and p2\nbar from p1 and p2\n");

	# SV 28456 : Don't reset $$< for default recipes
	run_make_test(q!
	.SECONDEXPANSION:

	.PHONY: foo bar
	foo: bar
	foo: $$(info $$<)
	%oo: ;
	!,
	'', "bar\n#MAKE#: Nothing to be done for 'foo'.\n");

	# SV 54161: Expand $$* properly when it contains a path

	run_make_test(q!
	.SECONDEXPANSION:
	%x: $$(info $$); @echo '$'
	!,
	'q/ux', "q/u\nq/u\n");



	# sv 60188.
	# Test that a file explicitly mentioned by the user and made by an implicit
	# rule is not considered intermediate.

	touch('hello.z');

	# subtest 1.
	# hello.x is derived from the stem and thus is an intermediate file.
	run_make_test(q!
	.SECONDEXPANSION:
	dep:=.x
	all: hello.z
	%.z: %$$(dep) ; @echo $@
	%.x: ;
	!, '', "#MAKE#: Nothing to be done for 'all'.\n");


	# subtest 2.
	# test.x is explicitly mentioned and thus is not an intermediate file.
	run_make_test(q!
	.SECONDEXPANSION:
	dep:=test.x
	all: hello.z
	%.z: %.x $$(dep) ; @echo $@
	%.x: ;
	!, '', "hello.z\n");

	# subtest 3.
	# make is building hello.z and does not second expand the prerequisites of rule
	# 'unrelated: $$(dep)'. '$$(dep)' stays not expanded and 'hello.x' is never
	# entered to the database. Make considers 'hello.x' intermediate while building
	# 'hello.z'. Because 'hello.z' is present and 'hello.x' is missing and
	# 'hello.x' is intermediate, there is no need to rebuild 'hello.z'.
	run_make_test(q!
	.SECONDEXPANSION:
	dep:=hello.x
	all: hello.z
	%.z: %.x; @echo $@
	%.x: ;
	unrelated: $$(dep)
	!, '', "#MAKE#: Nothing to be done for 'all'.\n");

	# subtest 4.
	# Just like subtest 3. $$(dep) is not second expanded. 'hello.x' is
	# intermediate.
	run_make_test(q!
	.SECONDEXPANSION:
	dep:=hello.x
	all: hello.z
	%.z: %.x; @echo $@
	%.x: ;
	%.q: $$(dep)
	!, '', "#MAKE#: Nothing to be done for 'all'.\n");

	unlink('hello.z');


	# sv 60188.
	# Test that a file explicitly mentioned by the user and made by an implicit
	# rule is not considered intermediate, even when the builtin rules are used.

	touch('hello.x');
	touch('hello.tsk');

	# subtest 1.
	# hello.z is explicitly mentioned and thus is not an intermediate file.
	run_make_test(q!
	.SECONDEXPANSION:
	dep:=hello.z
	all: hello.tsk
	%.tsk: $$(dep) ; @echo $@
	%.z : %.x ; @echo $@
	!, '', "hello.z\nhello.tsk");

	# subtest 2.
	# hello.z is derived from the stem and thus is an intermediate file.
	run_make_test(q!
	.SECONDEXPANSION:
	dep:=.z
	all: hello.tsk
	%.tsk: %$$(dep) ; @echo $@
	%.z : %.x ; @echo $@
	!, '', "#MAKE#: Nothing to be done for 'all'.\n");

	unlink('hello.x');
	unlink('hello.tsk');


	# sv 60659. Second expansion of automatic variables inside a function in the
	# prerequisite list.
	# $$@ expands to the target in the 1st and following rules.
	# $$* expands to the stem in the 1st and following rules.
	# $$<,$$^,$$+,$$\|,$$?,$$% expand to the empty string in the prerequisite list
	# of the 1st rule.
	# $$<,$$^,$$+,$$\|,$$?,$$% in the prerequisite list of the 2nd (and following)
	# rule expand to the values from the 1st rule.
	# $$% cannot be used in prerequisites, because in pattern rules % is
	# substituted for stem.


	# subtest 1. Pattern rules. 1st rule.
	run_make_test(q!
	.SECONDEXPANSION:
	all: 2.x
	%.x: 5.z 6.z 5.z $$(info @=$$@,<=$$<,^=$$^,+=$$+,\|=$$\|,?=$$?,=$$) ;
	%.z: ;
	!, '',
	"@=2.x,<=,^=,+=,\|=,?=,*=2
	#MAKE#: Nothing to be done for 'all'.\n");


	# subtest 2. Pattern rules. 2nd rule.
	run_make_test(q!
	.SECONDEXPANSION:
	all: 2.x 1.x
	2.x: 5.z 6.z 5.z \| 7.z 7.z 8.z
	1.x: 1.z 2.z 2.z \| 3.z 4.z
	%.x: 9.z $$(info @=$$@,<=$$<,^=$$^,+=$$+,\|=$$\|,?=$$?,=$$) ;
	%.z: ;
	!, '',
	"@=2.x,<=5.z,^=5.z 6.z,+=5.z 6.z 5.z,\|=7.z 8.z,?=,*=2
	@=1.x,<=1.z,^=1.z 2.z,+=1.z 2.z 2.z,\|=3.z 4.z,?=,*=1
	#MAKE#: Nothing to be done for 'all'.\n");


	# subtest 3. Static pattern rules. 1st rule.
	run_make_test(q!
	.SECONDEXPANSION:
	all: 2.x
	2.x: %.x: 5.z 6.z 5.z $$(info @=$$@,<=$$<,^=$$^,+=$$+,\|=$$\|,?=$$?,=$$) ;
	%.z: ;
	!, '',
	"@=2.x,<=,^=,+=,\|=,?=,*=2
	#MAKE#: Nothing to be done for 'all'.\n");


	# subtest 4. Static pattern rules. 2nd rule.
	run_make_test(q!
	.SECONDEXPANSION:
	all: 15.x 1.x
	15.x: 5.z 6.z 5.z \| 7.z 7.z 8.z
	1.x: 1.z 2.z 2.z \| 3.z 4.z
	15.x 1.x: %.x: 9.z $$(info @=$$@,<=$$<,^=$$^,+=$$+,\|=$$\|,?=$$?,=$$) ;
	%.z: ;
	!, '',
	"@=15.x,<=5.z,^=5.z 6.z,+=5.z 6.z 5.z,\|=7.z 8.z,?=,*=15
	@=1.x,<=1.z,^=1.z 2.z,+=1.z 2.z 2.z,\|=3.z 4.z,?=,*=1
	#MAKE#: Nothing to be done for 'all'.\n");


	# subtest 5. Grouped targets in implicit rules. 1st rule.
	run_make_test(q!
	.SECONDEXPANSION:
	all: 2.x
	%.x %.xx&: 5.z 6.z 5.z $$(info @=$$@,<=$$<,^=$$^,+=$$+,\|=$$\|,?=$$?,=$$) ;
	%.z: ;
	!, '',
	"@=2.x,<=,^=,+=,\|=,?=,*=2
	#MAKE#: Nothing to be done for 'all'.\n");


	# subtest 6. Grouped targets in implicit rules. 2nd rule.
	run_make_test(q!
	.SECONDEXPANSION:
	all: 2.x 1.xx
	2.x: 5.z 6.z 5.z \| 7.z 7.z 8.z
	1.xx: 1.z 2.z 2.z \| 3.z 4.z
	%.x %.xx&: 9.z $$(info @=$$@,<=$$<,^=$$^,+=$$+,\|=$$\|,?=$$?,=$$) ;
	%.z: ;
	!, '',
	"@=2.x,<=5.z,^=5.z 6.z,+=5.z 6.z 5.z,\|=7.z 8.z,?=,*=2
	@=1.xx,<=1.z,^=1.z 2.z,+=1.z 2.z 2.z,\|=3.z 4.z,?=,*=1
	#MAKE#: Nothing to be done for 'all'.\n");


	# subtest 7. Double colon rule.
	run_make_test(q!
	.SECONDEXPANSION:
	all: 2.x
	%.x:: 5.z 6.z 5.z $$(info @=$$@,<=$$<,^=$$^,+=$$+,\|=$$\|,?=$$?,=$$) ;
	5.z 6.z: ;
	!, '',
	"@=2.x,<=,^=,+=,\|=,?=,*=2
	#MAKE#: Nothing to be done for 'all'.\n");

	# sv 62324.
	# Integrity self check.
	run_make_test(q!
	.SECONDEXPANSION:
	all: bye.x
	%.x: $$(firstword %.1;
	!, '', "#MAKE#: *** unterminated call to function 'firstword': missing ')'. Stop.", 512);

	# sv 62706.
	# Test that makes avoids second expanding prerequisites of the rules which are
	# not tried during implicit search.
	# Here, make tries rules '%.tsk: %.o' and '%.o' and their prerequisites are
	# second expanded.
	# Rules '%.bin: %.x' and '%.x:' are not used in implicit search for 'hello.tsk'
	# and 'hello.o' and their prerequisites are not expanded.
	run_make_test(q!
	.SECONDEXPANSION:
	%.bin: %.x $$(info second expansion of $$@ prereqs); $(info $@ from $<)
	%.tsk: %.o $$(info second expansion of $$@ prereqs); $(info $@ from $<)
	%.x: $$(info second expansion of $$@ prereqs); $(info $@)
	%.o: $$(info second expansion of $$@ prereqs); $(info $@)
	!, '-R hello.tsk',
	"second expansion of hello.o prereqs
	second expansion of hello.tsk prereqs
	hello.o
	hello.tsk from hello.o
	#MAKE#: 'hello.tsk' is up to date.\n");

	# sv 62706.
	# No side effects from second expansion of unrelated rules.
	run_make_test(q!
	.SECONDEXPANSION:
	all: hello.tsk
	%.tsk: %.o; exit 1
	hello.o:;
	%.q: $$(shell touch hello.1);
	!, '',
	"exit 1
	#MAKE#: *** [#MAKEFILE#:4: hello.tsk] Error 1\n", 512);

	# sv 62706.
	# Second expansion of intermediate prerequisites.
	# The rule to build hello.x is implicit.
	# Test that $$(deps) is secondary expanded.
	run_make_test(q!
	deps:=hello.h
	.SECONDEXPANSION:
	all: hello.tsk
	%.tsk: %.x; $(info $@)
	%.x: $$(deps); $(info $@)
	hello.h:; $(info $@)
	!, '', "hello.h\nhello.x\nhello.tsk\n#MAKE#: Nothing to be done for 'all'.\n");

	# This tells the test driver that the perl test script executed properly.
	1;