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Date:      Mon, 28 Apr 2014 18:36:34 -0600
From:      Warner Losh <imp@bsdimp.com>
To:        Julian Elischer <julian@FreeBSD.org>
Cc:        FreeBSD Current <current@freebsd.org>
Subject:   Re: Make variables to force non default libraries and includes?
Message-ID:  <80F941B9-3A54-4059-BF99-A5F59A9731DA@gmail.com>
In-Reply-To: <535E07C9.5060309@freebsd.org>
References:  <535E07C9.5060309@freebsd.org>

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On Apr 28, 2014, at 1:48 AM, Julian Elischer <julian@FreeBSD.org> wrote:

> I need to do the equivalent of  "cd /usr/src/cddl/usr.sbin/dtrace; =
make DESTDIR=3D/mumble all install=94

cd /usr/src
make distributeworld DESTDIR=3D/mumble
cd cddl/usr.sbin/dtrace
make buildenv
make all install

> but it pulls in libraries from the base system, which differ slightly =
from those in the source tree.

The above will create the right /mumble hierarchy, and will pull the =
libraries from the build rather than the local system.

> How can I force it to use /mumble2/include and /mumble2/lib instead of =
/ ?
>=20
> I can pre-populate /mumble2 using "make buildworld", "make libraries", =
and "make includes" but
> I need to be able to do selective builds of just subdirectories after =
that..  I haven't spotted the right way of forcing the use of the =
"--system_root /mumble2" option in the compiles.
>=20
> I know we do it in 'buildworld' is there a more generic way?
>=20
> I have been looking in the .mk files but I haven't spotted it so far.

You=92re asking for some serious split-brain action. chroot builds are =
likely your best option. There=92s no easy way to force this, although =
you might get some milage out of WMAKEENV options, but I think we bake =
most of the where to look for things options into the binaries. One =
crazy option would be to set CC=3D=93cc =97sysroot /mumble=94 but I=92m =
sure there be dragons there=85

Good luck with this crazy, never have we supported it very well, option =
:)

Warner




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