From: lynn.lin@emc.com
Date: Sun, 25 Jul 2010 12:37:35 GMT
Subject: RE: [PATCH] Makefile: don't include git version file on 'make clean'
Message-ID: <7F48A44C0E1FBF48B00D4DA49C85432E54F9A1@CORPUSMX100A.corp.emc.com>
In-Reply-To: <AANLkTinjmUEHxnGI2kRBwN17689MEwRRX_1uOQx-ZaHY@mail.gmail.com>



-----Original Message-----
From: Ævar Arnfjörð Bjarmason [mailto:avarab@gmail.com] 
Sent: 2010年7月25日 20:34
To: Lin, Lynn
Cc: schwab@linux-m68k.org; kpfleming@digium.com; git@vger.kernel.org
Subject: Re: [PATCH] Makefile: don't include git version file on 'make clean'

On Sun, Jul 25, 2010 at 12:29,  <lynn.lin@emc.com> wrote:

> My patch is to don't call GIT-VERSION-FILE target when you run 'make clean'

Yes, but as I demonstrated it gets called anyway. Presumably because
of the $(MAKE) -C ... clean rules. But I haven't looked into it.


If we don't specify special goals, when we run any target ,it will call GIT-VERSIONF-FILE target as it include this target 

Example from GNU make manual:
http://www.gnu.org/software/autoconf/manual/make/Goals.html


An example of appropriate use is to avoid including .d files during clean rules (see Automatic Prerequisites), so make won't create them only to immediately remove them again:

          sources = foo.c bar.c
     
     ifneq ($(MAKECMDGOALS),clean)
     include $(sources:.c=.d)
     endif



Thanks
Lynn