No rule to make target `w'. Stop

vithre · 12-05-2012, 12:02 PM

Hello,

I am Trying to Build a project, Makefile written so that outer make file calls the inner Makefiles to Build,
I am invoking the Makefile as gmake depend at the perent directory of project (Makefile here digs in and executes inner Makefiles to build the project)

.DEFAULT:
@for subdir in `ls */Makefile`; \
do \
echo "+ Making $@ in `dirname $$subdir` ..."; \
(cd `dirname $$subdir`; $(MAKE) $@); \
done

the automatic variable $@ is set to depend, till some inner directories make process is going well and good ,after some point after I could see the error Message as *** No rule to make target `w'. Stop.,
with google help I found reasons like

1.infinite recursion
2.The value of $@ is set to w, as target now is w that won’t be found in the Makefile so causing such an error.

--> I have gmake output I could see make entering in to directories only once and leaving from directories only once, so error is not because of recursion.
-->I could see @ := wp when I issued gmake –p depend.

Could you suggest me the approach to solve this issue

Regards,
Vaithre

smallpond · 12-06-2012, 02:42 PM

The problem that you're having is most likely that ls can give weird results. It's better to use file globbing in the shell. Also, use the -C option rather than cd.

Code:

        for i in */Makefile ; do      /
            SUBDIR=`dirname "$$i"`;   /
            echo Entering $(SUBDIR) ; /
            $(MAKE) -C $(SUBDIR) $(TARGET) ; /
        done