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Date:      Mon, 7 Jul 2014 21:07:50 -0600
From:      Warner Losh <imp@bsdimp.com>
To:        Tim Kientzle <tim@kientzle.com>
Cc:        freebsd-arch@freebsd.org
Subject:   Re: Total confusion over toolchain/xdev behavior
Message-ID:  <ECFCADBA-BE9E-487E-B593-C4D4A888E464@bsdimp.com>
In-Reply-To: <2788FB1E-9498-40C2-94DE-F4C73A5DDD30@kientzle.com>
References:  <1404688077.1059.115.camel@bruno> <2788FB1E-9498-40C2-94DE-F4C73A5DDD30@kientzle.com>

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On Jul 7, 2014, at 8:59 PM, Tim Kientzle <tim@kientzle.com> wrote:

>=20
> On Jul 6, 2014, at 4:07 PM, Sean Bruno <sbruno@ignoranthack.me> wrote:
>=20
>> Objective:  install an xcompile toolchain into a jail for use by
>> poudriere during arm/mips/sparc/power ports pkgs builds.  The build
>> should be possible from a non-root user.
>>=20
>> As far as I can tell, the xdev target is completely busted for =
non-clang
>> arch's right now as it tries to build clang no matter what I do.
>=20
> I think you can avoid that if you specify both:
>  WITHOUT_CLANG=3Dt WITHOUT_CLANG_BOOTSTRAP=3Dt
>=20
>> Its missing some pretty key documentation to making it work =
correctly, so a
>> lot of my attempts have been "guess and check" with verbose make.
>=20
> Some of the complexity here might just be that =91xdev=92 is currently
> trying to do too much.  I think I would find it simpler to use if
> it were a handful of separate targets:
>=20
> # Build and install a cross-GCC using the in-tree sources
> make XDEV=3Darm XDEV_ARCH=3Darmv6 xdev-gcc
>=20
> # Build and install a cross-clang using the in-tree sources
> make XDEV=3Darm XDEV_ARCH=3Darmv6 xdev-clang
>=20
> # Build and install cross-binutils using the in-tree sources
> make XDEV=3Darm XDEV_ARCH=3Darmv6 xdev-binutils
>=20
> # Build and install cross-libraries
> # Prerequisite: (xdev-gcc or xdev-clang) and xdev-binutils
> make XDEV=3Darm XDEV_ARCH=3Darmv6 xdev-libs

Interesting ideas=85  Will have to ponder them again, but in the =
earliest days
I tried these and hit some turbulence=85 But as I said elsewhere on this =
thread,
that was maybe 10 years ago now and maybe things have changed :)

> # Have I missed anything?
>=20
> If I understand correctly, xdev-clang in many cases
> could install symlinks to the host clang without
> actually building anything.  (If I=92m right about that,
> maybe we could consider installing those symlinks
> for every architecture as part of the default base system.)

The driver program would need to know to use a different sys root (or =
we=92d
need to install things in the clang centric way) as well as which =
architecture
to use, which it might be able to guess based on the binary used to =
invoke
it (now that=92s a feature that has a checkered past, some good, some =
down
right awful). I=92ve been after the clang folks to justify bringing in =
everything on
every platform by providing an example cross build in the base, but so =
far
nothing has materialized...

Warner

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