GNU Make无法从循环中进入子目录

时间:2017-06-30 23:31:56

标签: c linux makefile gnu-make

我有一个包含多个子目录的项目,主Makefile需要能够构建/清理一些子目录 - 子目录的确切名称在变量中传递(示例中为DIRS):

DIRS = dir1 dir2 # Usually passed from the command line

.PHONY: all clean $(DIRS)

all: $(DIRS)
    # ... do stuff in this direcotry ...

$(DIRS):
    $(MAKE) -C $(@)

clean:
    # ... Clean this directory ...
    $(foreach d,$(DIRS),cd $(d) && $(MAKE) clean; )

由于我已经将目录名称用作构建目标,因此我想使用循环来清理每个子目录。但是我收到以下错误:

$ make clean
# ... Clean this directory ...
cd dir1 && make clean;  cd dir2 && make clean;
make[1]: Entering directory `/home/ex/clean_try/dir1'
rm -fr *.o
make[1]: Leaving directory `/home/ex/clean_try/dir1'
/bin/sh: 1: cd: can't cd to dir2
make: *** [clean] Error 2

好像它已经离开了dir1,为什么它不能从主目录进入dir2?

1 个答案:

答案 0 :(得分:2)

cd dir2是刚刚完成cd dir1 ---的背景,而dir2不是dir1的子目录,对吧? : - )

尝试:make -C $d clean

HTH