Date: Wed, 20 Nov 2002 17:37:55 +1100
To: linux-kernel@vger.kernel.org
Subject: Re: Separate obj/src dir
Message-ID: <20021120063754.GE21437@himi.org>
Mail-Followup-To: linux-kernel@vger.kernel.org
References: <20021119201110.GA11192@mars.ravnborg.org> <20021119205154.9616.qmail@escalade.vistahp.com>
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From: simon@himi.org (Simon Fowler)
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On Tue, Nov 19, 2002 at 02:51:54PM -0600, Brian Jackson wrote:
> Sam Ravnborg writes:=20
>=20
> <snip>
> >Another drawback is that when a .h file exist in the
> >SRCTREE but not in the OBJTREE the generated dependencies
> >will point out the .h file located in SRCTREE.
> >This happens for generated .h files, and therefore a simple
> >check is made in kbuild to check that the SRCTREE is
> >cleaned/mrpropered.
>=20
> I wonder how hard it would be to do this for other files types. It would =
be=20
> sort of handy to be able to copy a single file out of the source tree int=
o=20
> the build tree, and have the build use the copy in the build tree. Exampl=
e:=20
> you want to test a one liner in drivers/scsi/sd.c, you could just copy sd=
.c=20
> into the build tree, and make the change and test it out. That could be a=
=20
> huge space savings. That would help out those of us that are stuck with=
=20
> tiny hard drives in our laptops :)=20
>=20
For that you probably want to use the hardlinked trees approach.
Just do a cp -al linux-2.5 scratch; then change your file and build
from the copy.

Simon

--=20
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(crappy) Homepage: http://himi.org
doe #237 (see http://www.lemuria.org/DeCSS)=20
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