# $Id: must_make 2413 2010-09-11 17:43:04Z bird $                                        -*-perl-*-
## @file
# .MUST_MAKE target variable.
#

#
# Copyright (c) 2008-2010 knut st. osmundsen <bird-kBuild-spamx@anduin.net>
#
# This file is part of kBuild.
#
# kBuild is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# kBuild is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with kBuild.  If not, see <http://www.gnu.org/licenses/>
#
#

$description = "Tests the .MUST_MAKE target variable";

$details = "The .MUST_MAKE target variable is expanded when make is deciding
whether a file needs to be made or not.  If it returns a non-empty string,
when stripped, it will force the file to be made.  If it returns an empty
string GNU make decides the normal way.  Note that .MUST_MAKE does NOT have
to be expanded if make already knows the file needs building.  Also, note
that for multi target rules it may be invoked for each file.";

if ($is_kmk) {

   # TEST #0 - check to see that it gets called and is made.
   # -------------------------------------------------------
   &touch('foobar.1');
   run_make_test('

foobar.1: .MUST_MAKE = $(info mustmake:{@=$@,<=$<})FORCE
foobar.1: ;touch $@
',
'',
'mustmake:{@=foobar.1,<=}
touch foobar.1'
);
   unlink('foobar.1');

   # TEST #1 - check to see that it gets called and isn't made.
   # ----------------------------------------------------------
   &touch('foobar.1');
   run_make_test('

foobar.1: .MUST_MAKE = $(info mustmake:{@=$@,<=$<})
foobar.1: ;touch $@
',
'',
'mustmake:{@=foobar.1,<=}
#MAKE#: `foobar.1\' is up to date.'
);
   unlink('foobar.1');

   # TEST #2 - check to see that it doesn't get called unnecessary.
   # --------------------------------------------------------------
   run_make_test('
foobar.1: .MUST_MAKE = $(info mustmake:{@=$@,<=$})FORCE
foobar.1: ;@echo making $@
',
'',
'making foobar.1');

}



# Indicate that we're done.
1;