From: Junio C Hamano <gitster@pobox.com>
Date: Wed, 13 Feb 2013 16:51:45 GMT
Subject: Re: [PATCH] Makefile: don't run rm without any files
Message-ID: <7vtxpg9mxq.fsf@alter.siamese.dyndns.org>
In-Reply-To: <1360771068-505-1-git-send-email-kraai@ftbfs.org>

Matt Kraai <kraai@ftbfs.org> writes:

> From: Matt Kraai <matt.kraai@amo.abbott.com>
>
> "rm -f -r" fails on QNX when not passed any files to remove.

I do not think it is limited to QNX.

> the clean target, since dep_dirs is empty.

And dep_dirs being empty under some circumstance shouldn't be
limited to QNX, either.

I think your change does no harm, may be a good change if dep_dirs
goes empty, but the justification is lacking.  What caused your
dep_dirs to become empty in the first place?

I am scratching my head because I see

    OBJECTS := $(LIB_OBJS) $(BUILTIN_OBJS) $(PROGRAM_OBJS) $(TEST_OBJS) \
	$(XDIFF_OBJS) \
	$(VCSSVN_OBJS) \
	git.o
    dep_dirs := $(addsuffix .depend,$(sort $(dir $(OBJECTS))))



> Avoid this by merging two rm
> command lines.
>
> Signed-off-by: Matt Kraai <matt.kraai@amo.abbott.com>
> ---
>  Makefile | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/Makefile b/Makefile
> index 5a2e02d..c2e3666 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -2414,8 +2414,7 @@ clean: profile-clean
>  		builtin/*.o $(LIB_FILE) $(XDIFF_LIB) $(VCSSVN_LIB)
>  	$(RM) $(ALL_PROGRAMS) $(SCRIPT_LIB) $(BUILT_INS) git$X
>  	$(RM) $(TEST_PROGRAMS)
> -	$(RM) -r bin-wrappers
> -	$(RM) -r $(dep_dirs)
> +	$(RM) -r bin-wrappers $(dep_dirs)
>  	$(RM) -r po/build/
>  	$(RM) *.spec *.pyc *.pyo */*.pyc */*.pyo common-cmds.h $(ETAGS_TARGET) tags cscope*
>  	$(RM) -r $(GIT_TARNAME) .doc-tmp-dir