Re: [PATCH] Fix dependencies of parse-options test program

From: Pierre Habouzit <madcoder@debian.org>
Date: Nov 14, 2007, 08:48 UTC
Message-ID: <20071114084819.GA18926@artemis.corp>
In-Reply-To: <Pine.LNX.4.64.0711140012210.4362@racer.site>

On Wed, Nov 14, 2007 at 12:12:49AM +0000, Johannes Schindelin wrote:

Show 13 quoted lines

> Hi,
> 
> On Wed, 14 Nov 2007, Pierre Habouzit wrote:
> 
> > On Tue, Nov 13, 2007 at 11:46:20PM +0000, Johannes Schindelin wrote:
> > 
> > > apparently I forgot to send this patch, which I thought was only 
> > > relevant in the builtin-commit branch of mine:
> > 
> >   Btw is there a reason why git doesn't use the gcc -M* options to have
> > proper dependency informations ?
> 
> I suspect the reason is that we do not want to depend on gcc...

  right, but like said, other compilers can generate them, only with a
different CLI switch, and non withstanding this problem, there are tools
to generate such kind of information easily.

  Though for those who care about this issue, this is hackable easily
using config.mak, here is how:

    CFLAGS += -MMD -MF $(@D)/.$(@F:.o=.dep)
    -include $(wildcard .*.dep */.*.dep) GIT-VERSION-FILE

It's a quick hack, but allow gcc + gnu make (I believe $(@D) is GNU) users not to be bitten hard by those dependency issues.

The reason why I include GIT-VERSION-FILE again is that many make complain if -include gets an empty like as an argument, and passing /dev/null on certains occasions triggers warnings about /dev/null having a date in the future on some machines for a reason I never found.

-- 
·O·  Pierre Habouzit
··O                                                madcoder@debian.org
OOO                                                http://www.madism.org