将选项传递给 makefile

Question

生成文件

my_test:
ifdef $(toto)
        @echo 'toto is defined'
else
        @echo 'no toto around'
endif

预期行为

$ make my_test
no toto around

$ make my_test toto
toto is defined

当前行为

$ make my_test
no toto around

$ make my_test toto
no toto around
make: *** No rule to make target `toto'.  Stop.

当我运行时，make my_test我按预期得到 else 文本no toto around。然而

make my_test toto
no toto around
make: *** No rule to make target `toto'.  Stop.

生成文件版本

 $ make -v
   GNU Make 3.81

SLE版本

$ cat /etc/*release
  VERSION_ID="11.4"
  PRETTY_NAME="SUSE Linux Enterprise Server 11 SP4"

聚苯乙烯

关键是要make my_test详细 if toto，如果toto没有给出，则命令将静默运行

Answer 1

您需要删除toto周围的美元，并以不同的方式从命令行传递toto

命令行

make toto=1  my_test

生成文件

my_test:
ifdef toto
        @echo 'toto is defined'
else
        @echo 'no toto around'
endif