conditionals

来自「Linux 下的编译工具」· 代码 · 共 147 行

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

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

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

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

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

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

ifndef undefined
	@echo variable is undefined
else
	@echo variable undefined is defined
endif
ifdef arg4
	@echo arg4 is defined
else
	@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('
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('
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('
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');


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