#                                                                    -*-perl-*-
$description = "Test the .INCLUDE_DIRS special variable.";

$details = "";

use Cwd;

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

if (-d '/usr/include') {
  # Test #1: The content of .INCLUDE_DIRS depends on the platform for which
  #          make was built. What we know for sure is that it shouldn't be
  #          empty.
  #
  run_make_test('
ifeq ($(.INCLUDE_DIRS),)
$(warning .INCLUDE_DIRS is empty)
endif

.PHONY: all
all:;@:
',
                '', '');
}

# Test #2: Make sure -I paths end up in .INCLUDE_DIRS.
#
run_make_test('
ifeq ($(dir),)
$(warning dir is empty)
endif

ifeq ($(filter $(dir),$(.INCLUDE_DIRS)),)
$(warning .INCLUDE_DIRS does not contain $(dir): $(.INCLUDE_DIRS))
endif

.PHONY: all
all:;@:
',
              "-I$dir dir=$dir", '');

# Find the default .INCLUDE_DIRS
create_file('defaultdirs.mk', "\$(info \$(.INCLUDE_DIRS))\nall:;\@:\n");
my $cmd = subst_make_string('"#MAKEPATH#" -f defaultdirs.mk');
my @dirs = `$cmd`;
my $dirs = $dirs[0];
$dirs =~ s/\r?\n//g;
unlink('defaultdirs.mk');

run_make_test("
ifneq (\$(.INCLUDE_DIRS),$dirs)
\$(warning Mismatched \$(.INCLUDE_DIRS) != $dirs)
endif
all:;\@:
",
              '', '');

# Verify that -I- disables content from .INCLUDE_DIRS

run_make_test(q/
ifneq ($(.INCLUDE_DIRS),)
$(warning Mismatched $(.INCLUDE_DIRS) != )
endif
all:;@:
/,
              '-I-', '');

# Prefix -I dirs to the front
mkdir('somedir', 0777);

my $xdirs = $dirs ? " $dirs" : '';
run_make_test("
ifneq (\$(.INCLUDE_DIRS),somedir$xdirs)
\$(warning Mismatched '\$(.INCLUDE_DIRS)' != 'somedir$xdirs')
endif
all:;\@:
",
              '-I somedir', '');

# Verify .INCLUDE_DIRS contains files after -I-

run_make_test(q/
ifneq ($(.INCLUDE_DIRS),somedir)
$(warning Mismatched $(.INCLUDE_DIRS) != somedir)
endif
all:;@:
/,
              '-I - -I somedir', '');

rmdir('somedir');

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