Re: Make variables to force non default libraries and includes?

On Tue, 2014-04-29 at 13:31 +0800, Julian Elischer wrote:
> On 4/29/14, 8:57 AM, Ian Lepore wrote:
> > On Mon, 2014-04-28 at 18:36 -0600, Warner Losh wrote:
> >> On Apr 28, 2014, at 1:48 AM, Julian Elischer <julian_at_FreeBSD.org> wrote:
> >>
> >>> I need to do the equivalent of  "cd /usr/src/cddl/usr.sbin/dtrace; make DESTDIR=/mumble all install”
> >> cd /usr/src
> >> make distributeworld DESTDIR=/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 / ?
> >>>
> >>> 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.
> >>>
> >>> I know we do it in 'buildworld' is there a more generic way?
> >>>
> >>> I have been looking in the .mk files but I haven't spotted it so far.
> >> You’re asking for some serious split-brain action. chroot builds are likely your best option. There’s 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=“cc —sysroot /mumble” but I’m sure there be dragons there…
> >>
> >> Good luck with this crazy, never have we supported it very well, option :)
> >>
> >> Warner
> > Actually the hooks are in place to do this stuff.  Instead of make
> > buildenv to get an interactive shell you can do something like
> >
> >    BLDENV=`${MAKE} buildenvvars`
> >    chroot buildchroot/ "env -i $${BLDENV} cd /usr/src/somewhere && \
> >         make all install"
> >
> > -- Ian
> >
> >
> >
> >
> Is there a way to specify a different toolchain destination? i.e. not 
> /usr/obj/usr/src/tmp ?
> 

Not right now -- all that stuff is in Makefile.inc1 (WORLDTMP var and
related stuff) and there are no provisions for overriding it.

-- Ian