Date: Sat, 24 Jun 2000 13:08:09 -0700 From: "Crist J. Clark" <cristjc@earthlink.net> To: Mark Ovens <mark@dogma.freebsd-uk.eu.org> Cc: David Banning <sky_tracker@yahoo.com>, questions@FreeBSD.ORG Subject: Re: question about makefiles Message-ID: <20000624130808.B256@dialin-client.earthlink.net> In-Reply-To: <20000624192639.G233@parish>; from mark@dogma.freebsd-uk.eu.org on Sat, Jun 24, 2000 at 07:26:39PM %2B0100 References: <3954FC28.65C7DD21@yahoo.com> <20000624192639.G233@parish>
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On Sat, Jun 24, 2000 at 07:26:39PM +0100, Mark Ovens wrote:
> On Sat, Jun 24, 2000 at 02:21:28PM -0400, David Banning wrote:
> >
> > I have a general question about Makefiles.
> >
> > I see Makefile variables defined near the beginning of the file,
> > however
> > some variables used are seemingly not defined.
> >
> > a simple Makefile line says;
> >
> > @${PATCH} -s ${PREFIX}/Office51/bin/setup ${FILESDIR}/setup.patch
> >
> > PATCH, PREFIX and FILESDIR all are used, but not defined in Makefile.
> >
> > So where do they get defined?
> >
>
> /etc/make.conf and, for ports, /usr/ports/Mk/bsd.port.mk
Don't forget,
/usr/share/mk/sys.mk
/etc/defaults/make.conf
/etc/make.conf.local
/usr/share/mk/bsd.own.mk
/etc/objformat
How it works (I believe) is that /usr/share/mk/sys.mk is sourced
initially for all make(1)s. If you look at that file, it is the
one including,
/etc/defaults/make.conf
/etc/make.conf
/etc/make.conf.local
/usr/share/mk/bsd.own.mk
And that last one in turn also sucks up,
/etc/objformat
Now for ports, you will notice that the Makefiles have .include's of
their own which end up getting the files in /usr/ports/Mk as Mark
pointed out.
It all makes perfect sense... eventually.
--
Crist J. Clark cjclark@alum.mit.edu
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