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Date:      Fri, 22 Feb 2019 21:03:43 -0500
From:      "Brandon Bergren" <freebsd@bdragon.rtk0.net>
To:        "freebsd-toolchain@FreeBSD.org" <freebsd-toolchain@freebsd.org>, "John Baldwin" <jhb@FreeBSD.org>
Subject:   Re: External GCC Update
Message-ID:  <b8f8b304-d7af-4c53-82ac-ed4e9e6b78dc@www.fastmail.com>
In-Reply-To: <e8d1431f-cf99-1986-7f23-6ff0f4cd8314@FreeBSD.org>
References:  <e8d1431f-cf99-1986-7f23-6ff0f4cd8314@FreeBSD.org>

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On Fri, Feb 22, 2019, at 1:01 PM, John Baldwin wrote:
> I was recently able to install base/binutils and base/gcc into an amd6=
4 VM
> and do a self-hosted build and install.  Some of the port patches have=
 been
> committed from this, but I have some source patches before the final p=
orts
> patches can be finished.
>=20
> The source patches are here:
> https://github.com/bsdjhb/freebsd/compare/master...base_gcc
>=20
> They do a couple of things I'd like some feedback on:
>=20
> 1) MK_GDB no longer depends on MK_BINUTILS so that /usr/libexec/gdb ca=
n
>    still be built/installed when WITHOUT_BINUTILS=3Dyes is true

Good thinking.

> 2) WITH_BASE_GCC and WITH_BASE_BINUTILS knobs can be set in src.conf t=
o
>    ensure that 'make delete-old' doesn't delete files installed by the=

>    base/* packages if you also set WITHOUT_BINUTILS=3Dyes, and similar=

>    knobs (because you don't want to build/install the ones from src)

I was really confused about the naming when I read through the diff. Bik=
eshedding but I think WITH_PORTS_BASE_BINUTILS / WITH_PORTS_BASE_GCC wou=
ld help quite a lot cognitively, to differentiate between "base as in in=
-tree binutils" and "base as in the base/binutils port"

> 3) I add support for an /etc/src.conf.d dir that can hold files that g=
et
>    treated as if they are part of /etc/src.conf.  The current patch on=

>    github for this only fixes world and not yet kern.pre.mk and probab=
ly
>    needs the most review if we want to go forward with this route.  Wi=
th
>    this, I plan to have the base/* packages install suitable files in =
this
>    dir that disable build of the src-based components and also set
>    WITH_BASE_<foo> to make sure 'delete-old' DTRT.

Not sure if I like this. Can't src.opts.mk just call `pkg info -e base/b=
inutils` and so forth and use the exit result to adjust the defaults?

> The file for base/binutils would be:
>=20
> CROSS_BINUTILS_PREFIX=3D/usr/bin/
> WITH_BASE_BINUTILS=3Dyes
> WITHOUT_BINUTILS=3Dyes
> WITHOUT_LLD_IS_LD=3Dyes
>=20
> The file for base/gcc would be:
>=20
> XCC=3D/usr/bin/cc
> XCXX=3D/usr/bin/c++
> XCPP=3D/usr/bin/cpp
> X_COMPILER_TYPE=3Dgcc
> WITH_BASE_GCC=3Dyes
> WITHOUT_GCC=3Dyes
> WITHOUT_CLANG_IS_CC=3Dyes

I don't like the concept of packages messing with anything related to sr=
c.conf. I have a bunch of conditional stuff in mine broken out by ${TARG=
ET_ARCH} and extra config suddenly appearing would break a lot of my cro=
ss compiling stuff, even if it is in a separate *.d folder.

Seems to me that just influencing src.opts.mk's defaults would be more r=
obust.

>=20
> Thoughts?
>=20
> --=20
> John Baldwin
>=20
> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0
>

--=20
  Brandon Bergren
Technical Generalist



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