#                                                                    -*-perl-*-

$description = "Test parallelism (-j) option.";
$details = "";

if (!$parallel_jobs) {
  return -1;
}

run_make_test(q!
all : def_1 def_2 def_3
def_1 : ; @#HELPER# file ONE wait THREE out TWO
def_2 : ; @#HELPER# wait FOUR file THREE
def_3 : ; @#HELPER# wait ONE file FOUR!,
              '-j4', "file ONE\nwait ONE\nfile FOUR\nwait FOUR\nfile THREE\nwait THREE\nTWO");
rmfiles(qw(ONE TWO THREE FOUR));

# Verify -j added to MAKEFLAGS in the makefile
run_make_test(q!
MAKEFLAGS += -j4
all : def_1 def_2 def_3
def_1 : ; @#HELPER# file ONE wait THREE out TWO
def_2 : ; @#HELPER# wait FOUR file THREE
def_3 : ; @#HELPER# wait ONE file FOUR!,
              '', "file ONE\nwait ONE\nfile FOUR\nwait FOUR\nfile THREE\nwait THREE\nTWO");
rmfiles(qw(ONE TWO THREE FOUR));

# Command line should take precedence
run_make_test(q!
MAKEFLAGS += -j2
all : def_1 def_2 def_3
def_1 : ; @#HELPER# file ONE wait THREE out TWO
def_2 : ; @#HELPER# wait FOUR file THREE
def_3 : ; @#HELPER# wait ONE file FOUR!,
              '-j4', "file ONE\nwait ONE\nfile FOUR\nwait FOUR\nfile THREE\nwait THREE\nTWO");
rmfiles(qw(ONE TWO THREE FOUR));

# Test parallelism with included files.  Here we sleep/echo while
# building the included files, to test that they are being built in
# parallel.
run_make_test(q!
all: 1 2; @#HELPER# out success
-include 1.inc 2.inc
.RECIPEPREFIX := >
1.inc:
> @#HELPER# file ONE.inc wait THREE.inc file TWO.inc
> @echo '1: ; @#HELPER# file ONE wait THREE file TWO' > $@
2.inc:
> @#HELPER# wait ONE.inc file THREE.inc
> @echo '2: ; @#HELPER# wait ONE file THREE' > $@!,
              "-j4",
              "file ONE.inc\nwait ONE.inc\nfile THREE.inc\nwait THREE.inc\nfile TWO.inc\nfile ONE\nwait ONE\nfile THREE\nwait THREE\nfile TWO\nsuccess\n", 0, 7);
rmfiles(qw(ONE.inc TWO.inc THREE.inc ONE TWO THREE 1.inc 2.inc));


# Test parallelism with included files--this time recurse first and make
# sure the jobserver works.
run_make_test(q!
recurse: ; @$(MAKE) --no-print-directory -f #MAKEFILE# INC=yes all
all: 1 2; @#HELPER# out success

INC = no
ifeq ($(INC),yes)
-include 1.inc 2.inc
endif

1.inc: ; @#HELPER# file ONE.inc wait THREE.inc file TWO.inc; echo '1: ; @#HELPER# file ONE wait THREE file TWO' > $@
2.inc: ; @#HELPER# wait ONE.inc file THREE.inc; echo '2: ; @#HELPER# wait ONE file THREE' > $@!,
              "-j4",
              "file ONE.inc\nwait ONE.inc\nfile THREE.inc\nwait THREE.inc\nfile TWO.inc\nfile ONE\nwait ONE\nfile THREE\nwait THREE\nfile TWO\nsuccess\n", 0, 7);
rmfiles(qw(ONE.inc TWO.inc THREE.inc ONE TWO THREE 1.inc 2.inc));

# Grant Taylor reports a problem where tokens can be lost (not written back
# to the pipe when they should be): this happened when there is a $(shell ...)
# function in an exported recursive variable.  I added some code to check
# for this situation and print a message if it occurred.  This test used
# to trigger this code when I added it but no longer does after the fix.

run_make_test(q!
export HI = $(shell $($@.CMD))
first.CMD = #HELPER# out hi
second.CMD = #HELPER# sleep 4

.PHONY: all first second
all: first second

first second: ; @#HELPER# out $@ sleep 1 out $@!,
              '-j2', "first\nsleep 1\nfirst\nsecond\nsleep 1\nsecond", 0);

# Michael Matz <matz@suse.de> reported a bug where if make is running in
# parallel without -k and two jobs die in a row, but not too close to each
# other, then make will quit without waiting for the rest of the jobs to die.

run_make_test(q!
.PHONY: all fail.1 fail.2 fail.3 ok
all: fail.1 ok fail.2 fail.3

fail.1: ; @#HELPER# -q sleep 1 out $@ file fail.1 fail 1
fail.2: ; @#HELPER# -q sleep 2 out $@ wait fail.1 file fail.2 fail 1
fail.3: ; @#HELPER# -q sleep 3 out $@ wait fail.2 file fail.3 fail 1

ok: ; @#HELPER# -q sleep 4 wait fail.3 out OK!,
              '-rR -j5', "fail.1
#MAKE#: *** [#MAKEFILE#:5: fail.1] Error 1
#MAKE#: *** Waiting for unfinished jobs....
fail.2
#MAKE#: *** [#MAKEFILE#:6: fail.2] Error 1
fail.3
#MAKE#: *** [#MAKEFILE#:7: fail.3] Error 1
OK",
             512);

rmfiles(qw(fail.1 fail.2 fail.3));

# Test for Savannah bug #15641.
#
run_make_test('
.PHONY: all
all:; @:

-include foo.d

foo.d: comp ; @#HELPER# out $@

comp: mod_a.o mod_b.o; @:

mod_a.o mod_b.o: ; @#HELPER# fail 1
', '-j2', "fail 1\nfail 1\n");


# TEST #9 -- Savannah bugs 3330 and 15919
# In earlier versions of make this will either give the wrong answer, or hang.

utouch(-10, 'target');
run_make_test('target: intermed ; #HELPER# file $@

.INTERMEDIATE: intermed
intermed: | phony ; #HELPER# file $@

.PHONY: phony
phony: ; : phony', '-rR -j', ': phony');
rmfiles('target');

# TEST #11: Make sure -jN from MAKEFLAGS is processed even when we re-exec
# See Savannah bug #33873

$ENV{MAKEFLAGS} = '-j4';

run_make_test(q!
things = thing1 thing2
all: $(things)
thing1:; @#HELPER# wait thing2start file $@start wait thing2end out $@end
thing2:; @#HELPER# file $@start wait thing1start file $@end
-include inc.mk
inc.mk: ; @touch $@
!,
              '', "file thing2start\nwait thing2start\nfile thing1start\nwait thing1start\nfile thing2end\nwait thing2end\nthing1end\n");

rmfiles(qw(inc.mk thing1start thing1end thing2start thing2end));

# Ensure intermediate/secondary files are not pruned incorrectly.
# See Savannah bug #30653

utouch(-15, 'file2');
utouch(-10, 'file4');
utouch(-5,  'file1');

run_make_test(q!
.INTERMEDIATE: file3
file4: file3 ; @mv -f $< $@
file3: file2 ; touch $@
file2: file1 ; @touch $@
!,
              '--no-print-directory -j2', "touch file3");

rmfiles('file1', 'file2', 'file3', 'file4');

# Ensure that the jobserver is preserved across make re-exec.

run_make_test(q!
all: one two
one: ;@ #HELPER# wait TWO file ONE
two: ;@ #HELPER# file TWO
include fff1.mk
fff1.mk: ; touch $@
!,
              '-j2', "touch fff1.mk\nfile TWO\nwait TWO\nfile ONE\n");

rmfiles('fff1.mk', 'ONE', 'TWO');

# Test if a sub-make needs to re-exec and the makefile is built via
# sub-make.  Reported by Masahiro Yamada <yamada.masahiro@socionext.com>

run_make_test(q!
all: ; @$(MAKE) -f #MAKEFILE# recurse

recurse: one two ; @#HELPER# out $@
one: ;@ #HELPER# wait TWO file ONE
two: ;@ #HELPER# file TWO

mkinclude: ; touch fff1.mk

ifeq ($(MAKECMDGOALS),recurse)
include fff1.mk
fff1.mk: ; @$(MAKE) -f #MAKEFILE# mkinclude
endif
!,
              '--no-print-directory -j2', "touch fff1.mk\nfile TWO\nwait TWO\nfile ONE\nrecurse\n");

rmfiles('fff1.mk', 'ONE', 'TWO');


# Make sure that all jobserver FDs are closed if we need to re-exec the
# master copy.
#
# First, find the "default" file descriptors we normally use
# Then make sure they're still used.
#
# Right now we don't have a way to run a makefile and capture the output
# without checking it, so we can't really write this test.

# run_make_test('
# submake: ; @$(MAKE) --no-print-directory -f #MAKEFILE# fdprint 5>output

# dependfile: ; @echo FOO=bar > $@

# INCL := true

# FOO=foo
# ifeq ($(INCL),true)
# -include dependfile
# endif

# fdprint: ; @echo $(filter --jobserver%,$(MAKEFLAGS))

# recurse: ; @$(MAKE) --no-print-directory -f #MAKEFILE# submake INCL=true',
#               '-j2 INCL=false fdprint',
#               'bar');

# rmfiles(qw(dependfile output));


# # Do it again, this time where the include is done by the non-master make.
# run_make_test(undef, '-j2 recurse INCL=false', 'bar');

# rmfiles(qw(dependfile output));

1;