Re: Help-make Digest, Vol 77, Issue 5

[xiangfeng shen]

Hi Sam,

 

I want to replace the for loop to avoid BAD DO.

So i tried the 3) method, but it does not work :(

any more suggestion?

 

thanks.

carl

2009/4/9 Sam Ravnborg <address@hidden>

On Thu, Apr 09, 2009 at 02:27:43PM +0800, xiangfeng shen wrote:
> Hi,
>
> I have a question about how to replace for loop in clearmake to avoid bad
> DO.
> Makefile:
>
> SUBDIRS = foo bar baz
>
> subdirs:
>
> for dir in $(SUBDIRS); do \
>
> $(MAKE) -C $$dir; \
>
> done

So you want to execute $(MAKE) for each dir.
There are several ways to do so:

1) Using the shell

subdirs:
       for D in $(SUBDIRS); do make -C $D; done

2) Using the builtin shell
subdirs:
       $(foreach D, $(SUBDIRS), $(shell $(MAKE) -C $D))

3) Using dependencies

subdirs: $(SUBDIRS)

$(SUBDIRS):
       $(MAKE) -C $@


This is all from memory and un-tested..

       Sam