#                                                                    -*-perl-*-

$description = "Test the .WARNINGS variable.";

my %warn_test = (
    'warn' => 'warn', 'error warn' => 'warn',
    'error' => 'error',
    'ignore error ignore invalid-var,invalid-ref,undefined-var' => 'ignore,invalid-var,invalid-ref,undefined-var',
    'invalid-ref:ignore error invalid-var:warn,,,,,undefined-var:error,,,,,' => '=error,invalid-var,invalid-ref:ignore,undefined-var:error'
);

# Verify that values set in .WARNINGS don't get passed to sub-makes

while (my ($f, $r) = each %warn_test) {
    run_make_test(qq!
.WARNINGS = error
\$(info MF=\$(MAKEFLAGS))
all:; \@#HELPER# env MAKEFLAGS
!,
                  '', "MF=\nMAKEFLAGS=");
}

# Verify that make's special variables don't warn even if they're not set
run_make_test(q!
.WARNINGS = undefined-var
vars := $(.VARIABLES) $(MAKECMDGOALS) $(MAKE_RESTARTS) $(CURDIR)
vars += $(GNUMAKEFLAGS) $(MAKEFLAGS) $(MFLAGS) $(MAKE_COMMAND) $(MAKE)
vars += $(MAKEFILE_LIST) $(MAKEOVERRIDES) $(-*-command-variables-*-)
vars += $(.RECIPEPREFIX) $(.LOADED) $(.FEATURES)
vars += $(SHELL) $(.SHELLFLAGS) $(MAKE_TERMOUT) $(MAKE_TERMERR)
vars += $(.DEFAULT) $(.DEFAULT_GOAL) $(-*-eval-flags-*-) $(SUFFIXES)
vars += $(VPATH) $(GPATH)
all:;
!,
              '', "#MAKE#: 'all' is up to date.");

# sv 63609.
# Test for buffer overrun in warn_undefined.
run_make_test(q!
.WARNINGS = undefined-var
all:;
X := $(averyveryveryloooooooooooooooooooooooooooongvariablename)
!,
              '', "#MAKEFILE#:4: warning: reference to undefined variable 'averyveryveryloooooooooooooooooooooooooooongvariablename'
#MAKE#: 'all' is up to date.\n"
);

# Check undefined variable warnings

# With no options or with ignore, nothing should happen
run_make_test('
.WARNINGS := $(warnval)
EMPTY =
EREF = $(EMPTY)
UREF = $(UNDEFINED)

SEREF := $(EREF)
SUREF := $(UREF)

all: ; @echo ref $(EREF) $(UREF)',
              '', 'ref');

run_make_test(undef, 'warnval=undefined-var:ignore', 'ref');

# Check warnings
run_make_test(undef, 'warnval=undefined-var',
              "#MAKEFILE#:8: warning: reference to undefined variable 'UNDEFINED'
#MAKEFILE#:10: warning: reference to undefined variable 'UNDEFINED'
ref");

# Check and errors
run_make_test(undef, 'warnval=undefined-var:error',
              "#MAKEFILE#:8: *** reference to undefined variable 'UNDEFINED'.  Stop.", 512);

# Check invalid variable reference warnings

# With no options we still check for invalid references
run_make_test('
.WARNINGS = $(warnval)
IREF = $(bad variable)
SIREF := $(IREF)

define nl


endef

all: ; @echo ref $(also$(nl)bad) $(IREF) $(SIREF)',
              '', "#MAKEFILE#:3: warning: invalid variable reference 'bad variable'
#MAKEFILE#:11: warning: invalid variable reference 'also\nbad'
#MAKEFILE#:3: warning: invalid variable reference 'bad variable'
ref");

run_make_test(undef, 'warnval=ignore', 'ref');

run_make_test(undef, 'warnval=invalid-ref:ignore', 'ref');

# Check and errors
run_make_test(undef, 'warnval=invalid-ref:error',
              "#MAKEFILE#:3: *** invalid variable reference 'bad variable'.  Stop.", 512);

# Check invalid variable name warnings

# With no options we still check for invalid references
run_make_test('
.WARNINGS = $(warnval)
EMPTY =
SPACE = $(EMPTY) $(EMPTY)
BAD$(SPACE)VAR = foo

define nl


endef

NL$(nl)VAR = bar

define BAD$(SPACE)DEF :=
foo
endef

define NL$(nl)DEF :=
foo
endef

all: ; @echo ref',
              '', "#MAKEFILE#:5: warning: invalid variable name 'BAD VAR'
#MAKEFILE#:12: warning: invalid variable name 'NL\nVAR'
#MAKEFILE#:14: warning: invalid variable name 'BAD DEF'
#MAKEFILE#:18: warning: invalid variable name 'NL\nDEF'
ref");

run_make_test(undef, 'warnval=ignore', 'ref');

run_make_test(undef, 'warnval=invalid-var:ignore', 'ref');

# Check errors
run_make_test(undef, 'warnval=invalid-var:error',
              "#MAKEFILE#:5: *** invalid variable name 'BAD VAR'.  Stop.", 512);

# Make sure unknown warnings and actions are only noted but not failed on:
# this allows makefiles to be portable to older versions where those warnings
# didn't exist

run_make_test(q!
.WARNINGS = no-such-warn
all:;
!,
    '',"#MAKEFILE#:2: unknown warning 'no-such-warn': ignored\n#MAKE#: 'all' is up to date.");

run_make_test(q!
.WARNINGS = invalid-var:no-such-action
all:;
!,
    '',"#MAKEFILE#:2: unknown warning action 'no-such-action': ignored\n#MAKE#: 'all' is up to date.");

# sv 65739. Circular dependency.
run_make_test(q!
hello: hello; @:
!,
              '', "#MAKE#: circular hello <- hello dependency dropped\n");
run_make_test(q!
.WARNINGS = circular-dep:error
hello: hello; @:
!,
              '', "#MAKE#: *** circular hello <- hello dependency detected.  Stop.\n", 512);
run_make_test(q!
.WARNINGS = circular-dep:warn
hello: hello; @:
!,
              '', "#MAKE#: circular hello <- hello dependency dropped\n");
run_make_test(q!
.WARNINGS = circular-dep:ignore
hello: hello; @:
!,
              '', '');


# Validate .WARNINGS set as target-specific variables
# This is not supported (yet...?)

# run_make_test(q!
# ok := $(undef)
# ref = $(undef)

# all: enabled disabled enabled2 ;

# .WARNINGS = undefined-var

# enabled enabled2 disabled ref: ; $(info $@:$(ref))

# disabled: .WARNINGS =
# disabled: ref
# !,
#     '', "#MAKEFILE#:9: reference to undefined variable 'undef'\nenabled:
# ref:
# disabled:
# #MAKEFILE#:9: reference to undefined variable 'undef'\nenabled2:
# #MAKE#: 'all' is up to date.");

1;