语法
$(shell pwd)
shell是函数名,后面的pwd是参数,返回的结果赋值给LDIR
CMD前面加@表示执行的时候不显示该命令,只显示命令的输出
当makefile的文件名不是makefile或者Makefile的时候,用make -f 文件名
注:只是定义变量的话,这个shell不会被执行,执行当这个变量被CMD执行的时候,这个shell才会被执行
[root@system CProgram]# cat test.mk
#test.mk
LDIR=$(shell pwd)
LSS=$(shell ls)
test:
@echo $(LDIR)
@echo $(LSS)
[root@system CProgram]# make -f test.mk
/home/gaole/CProgram
test.mk
[root@system CProgram]#
[root@system CProgram]# cat test.mk
#test.mk
LDIR=$(shell pwd)
LSS=$(shell ls)
test:
echo $(LDIR)
echo $(LSS)
[root@system CProgram]# make -f test.mk
echo /home/gaole/CProgram
/home/gaole/CProgram
echo test.mk
test.mk
@-中的-表示,即使执行错误,也要继续执行下面的CMD
root@system CProgram]# cat test.mk
#test.mk
LDIR=$(shell pwd)
LSS=$(shell ls)
TMP=$(shell echo "test">test)
test:
@echo $(LDIR)
@echo $(LSS)
@-echo $(TMP)
[root@system CProgram]# make -f test.mk
make: `test' is up to date.
[root@system CProgram]# ls
test test.mk
[root@system CProgram]# cat test
test
[root@system CProgram]#
添加一个复杂shell脚本
加上.PHONY:test,执行test是伪目标
[root@system CProgram]# make -f test.mk test
make: `test' is up to date.
[root@system CProgram]# vim test.mk
[root@system CProgram]# cat test.mk
#test.mk
LDIR=$(shell pwd)
LSS=$(shell ls)
TMP=$(shell echo "test">test)
OUT:=out
INIT=$(shell if [ ! -d $(OUT) ];then mkdir $(OUT);fi;)
test:
@echo $(INIT)
@echo $(LDIR)
@echo $(LSS)
@-echo $(TMP)
.PHONY:test
[root@system CProgram]#
[root@system CProgram]#
[root@system CProgram]#
[root@system CProgram]# make -f test.mk
INIT
/home/gaole/CProgram
test test.mk
[root@system CProgram]# cat test.mk
#test.mk
LDIR=$(shell pwd)
LSS=$(shell ls)
TMP=$(shell echo "test">test)
OUT:=out
INIT=$(shell if [ ! -d $(OUT) ];then mkdir $(OUT);fi;)
test:
@echo $(INIT)
@echo $(LDIR)
@echo $(LSS)
@-echo $(TMP)
.PHONY:test
[root@system CProgram]#
[root@system CProgram]#
[root@system CProgram]# ls
test test.mk
[root@system CProgram]# make -f test.mk
/home/gaole/CProgram
out test test.mk
[root@system CProgram]# ls
out test test.mk
根据目录名称直接生成TARGET,需要嵌套使用两个函数
TARGET=$(notdir $(shell pwd))
用途取出 /home/leg/CProgram中的CProgram
[root@system CProgram]# cat test.mk
#test.mk
LDIR=$(shell pwd)
TARGET=$(notdir $(shell pwd))
LSS=$(shell ls)
TMP=$(shell echo "test">test)
OUT:=out
INIT=$(shell if [ ! -d $(OUT) ];then mkdir $(OUT);fi;)
test:
@echo $(INIT)
@echo $(LDIR)
@echo $(LSS)
@-echo $(TMP)
@echo $(TARGET)
.PHONY:test
[root@system CProgram]# make -f test.mk
/home/leg/CProgram
out test test.mk
CProgram
[root@system CProgram]# pwd
/home/leg/CProgram
[root@system CProgram]#