#                                                                    -*-perl-*-
$description = "Check GNU Make conditionals.";

$details = "Attempt various different flavors of GNU Make conditionals.";

run_make_test(q!
arg1 = first
arg2 = second
arg3 = third
arg4 = cc
arg5 = second

all:
ifeq ($(arg1),$(arg2))
#TAB#@echo arg1 equals arg2
else
#TAB#@echo arg1 NOT equal arg2
endif

ifeq '$(arg2)' "$(arg5)"
#TAB#@echo arg2 equals arg5
else
#TAB#@echo arg2 NOT equal arg5
endif

ifneq '$(arg3)' '$(arg4)'
#TAB#@echo arg3 NOT equal arg4
else
#TAB#@echo arg3 equal arg4
endif

ifndef undefined
#TAB#@echo variable is undefined
else
#TAB#@echo variable undefined is defined
endif
ifdef arg4
#TAB#@echo arg4 is defined
else
#TAB#@echo arg4 is NOT defined
endif!,
              '',
              'arg1 NOT equal arg2
arg2 equals arg5
arg3 NOT equal arg4
variable is undefined
arg4 is defined');


# Test expansion of variables inside ifdef.

run_make_test(q!
foo = 1

FOO = foo
F = f

DEF = no
DEF2 = no

ifdef $(FOO)
DEF = yes
endif

ifdef $(F)oo
DEF2 = yes
endif


DEF3 = no
FUNC = $1
ifdef $(call FUNC,DEF)3
  DEF3 = yes
endif

all:; @echo DEF=$(DEF) DEF2=$(DEF2) DEF3=$(DEF3)!,
              '',
              'DEF=yes DEF2=yes DEF3=yes');


# Test all the different "else if..." constructs

run_make_test(q!
arg1 = first
arg2 = second
arg3 = third
arg4 = cc
arg5 = fifth

result =

ifeq ($(arg1),$(arg2))
  result += arg1 equals arg2
else ifeq '$(arg2)' "$(arg5)"
  result += arg2 equals arg5
else ifneq '$(arg3)' '$(arg3)'
  result += arg3 NOT equal arg4
else ifndef arg5
  result += variable is undefined
else ifdef undefined
  result += arg4 is defined
else
  result += success
endif


all: ; @echo $(result)!,
              '',
              'success');


# Test some random "else if..." construct nesting

run_make_test(q!
arg1 = first
arg2 = second
arg3 = third
arg4 = cc
arg5 = second

ifeq ($(arg1),$(arg2))
  $(info failed 1)
else ifeq '$(arg2)' "$(arg2)"
  ifdef undefined
    $(info failed 2)
  else
    $(info success)
  endif
else ifneq '$(arg3)' '$(arg3)'
  $(info failed 3)
else ifdef arg5
  $(info failed 4)
else ifdef undefined
  $(info failed 5)
else
  $(info failed 6)
endif

.PHONY: all
all: ; @:!,
              '',
              'success');

# SV 47960 : ensure variable assignments in non-taken legs don't cause problems
run_make_test(q!
ifneq ($(FOO),yes)
target:
else
BAR = bar
target:
endif
#TAB#@echo one
!,
              '', "one\n");

# SV 64085: Ensure tab-prefixed conditional directives are warned about
# In a future release these will become errors: according to the docs this
# was never allowed, but unfortunately the code didn't check for it.
my @defcond = ('ifdef', 'ifndef');
my @eqcond = ('ifeq', 'ifneq');

for my $d (@defcond) {
    run_make_test(qq!
blah=1
#TAB#$d blah
endif
all:;
!,
    '', "#MAKEFILE#:3: warning: conditional directive lines cannot start with TAB\n#MAKE#: 'all' is up to date.");
}

for my $d (@eqcond) {
    run_make_test(qq!
blah=1
#TAB#$d (a,b)
endif
all:;
!,
    '', "#MAKEFILE#:3: warning: conditional directive lines cannot start with TAB\n#MAKE#: 'all' is up to date.");
}

run_make_test(q!
ifeq (a, b)
#TAB## noop
else
#TAB#ifeq (a, b)
#TAB##TAB## noop
#TAB#endif
endif

all:
#TAB#@echo foo
!,
              '', "#MAKEFILE#:5: warning: conditional directive lines cannot start with TAB\n#MAKEFILE#:7: warning: conditional directive lines cannot start with TAB\nfoo");

run_make_test(q!
all:

$(info hello)
ifdef blah
junk:
#TAB#else
else
endif
!,
              '', "hello\n#MAKEFILE#:7: warning: conditional directive lines cannot start with TAB\n#MAKEFILE#:8: *** only one 'else' per conditional.  Stop.",
              512);

run_make_test(q!
blah=1
ifdef blah
else
#TAB#else
endif
all:;
!,
              '', "#MAKEFILE#:5: warning: conditional directive lines cannot start with TAB\n#MAKEFILE#:5: *** only one 'else' per conditional.  Stop.",
              512);

run_make_test(q!
blah=1
ifdef blah
else
#TAB#endif
endif
all:;
!,
              '', "#MAKEFILE#:5: warning: conditional directive lines cannot start with TAB\n#MAKEFILE#:6: *** extraneous 'endif'.  Stop.",
              512);

run_make_test(q!
blah=1
ifdef blah
else
#TAB#ifdef blah
endif
all:;
!,
              '', "#MAKEFILE#:5: warning: conditional directive lines cannot start with TAB\n#MAKEFILE#:8: *** missing 'endif'.  Stop.",
              512);

run_make_test(q!
blah=1
all:;
foo:
ifdef blah
#TAB#ifdef blah
endif
!,
    '', "#MAKE#: 'all' is up to date.");

run_make_test(q!
blah=1
all:;
foo:
ifdef blah
#TAB#endif
endif
!,
    '', "#MAKE#: 'all' is up to date.");

run_make_test(q!
blah=1
all:;
foo:
ifdef blah
#TAB#else
else
endif
!,
    '', "#MAKE#: 'all' is up to date.");

# SV 64402: parse braces in ifeq/ifneq properly

run_make_test(q!
ifeq ($(and a,b),)
endif
ifeq (${and a,b},)
endif
ifeq (${and $(x),${or $(z),${q}}},)
endif
ifeq (${and ),(},)
endif
ifeq ($(and },{),)
endif
# We can hide the comma in a variable
C = ,
ifeq ((and a$Cb),)
endif
all:;
!,
    '', "#MAKE#: 'all' is up to date.");

# The "," in "$," is a variable name not a comma
run_make_test(q!
ifeq ($,,)
$(info ok)
endif
all:;
!,
    '', "ok\n#MAKE#: 'all' is up to date.");

# Without variable references we don't do anything special with parens
run_make_test(q!
ifeq ((and a,b),)
endif
all:;
!,
    '', "#MAKEFILE#:2: extraneous text after 'ifeq' directive\n#MAKE#: 'all' is up to date.");

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