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From: Kyle Evans <kevans@freebsd.org>
Date: Fri, 16 Oct 2020 10:41:34 -0500
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Subject: Re: svn commit: r366766 - head
To: Jessica Clarke <jrtc27@debian.org>
Cc: src-committers <src-committers@freebsd.org>,
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On Fri, Oct 16, 2020 at 10:36 AM Jessica Clarke <jrtc27@debian.org> wrote:
>
> On 16 Oct 2020, at 16:16, Kyle Evans <kevans@FreeBSD.org> wrote:
> >
> > Author: kevans
> > Date: Fri Oct 16 15:16:23 2020
> > New Revision: 366766
> > URL: https://svnweb.freebsd.org/changeset/base/366766
> >
> > Log:
> >  Makefile: add a small blurb about building with gcc xtoolchain
> >
> >  The key details are to install the appropriate flavor of devel/freebsd-gcc9
> >  and pass CROSS_TOOLCHAIN while building.
> >
> >  Suggested by:        kib
> >
> > Modified:
> >  head/Makefile
> >
> > Modified: head/Makefile
> > ==============================================================================
> > --- head/Makefile     Fri Oct 16 14:28:13 2020        (r366765)
> > +++ head/Makefile     Fri Oct 16 15:16:23 2020        (r366766)
> > @@ -89,6 +89,15 @@
> > # 10.  `reboot'
> > # 11.  `make delete-old-libs' (in case no 3rd party program uses them anymore)
> > #
> > +# For individuals wanting to build from source with GCC from ports, first build
> > +# or install an appropriate flavor of devel/freebsd-gcc9.  The packages produced
> > +# by this port are named "${TARGET_ARCH}-gcc9" -- note that not all
> > +# architectures supported by FreeBSD have an external gcc toolchain available.
> > +#
> > +# Once the appropriate freebsd-gcc package is installed, simply pass
> > +# CROSS_TOOLCHAIN=${TARGET_ARCH}-gcc9 while building with the above steps,
> > +# e.g., `make buildworld CROSS_TOOLCHAIN=amd64-gcc9`.
>
> Given GCC 10 is the latest GCC release so this is already a bit
> outdated (though perhaps GCC 9 is still the recommended version for
> FreeBSD now?), should this not avoid hard-coding a specific version and
> thus s/9/N/ (or X)?
>

Probably so, yes -- freebsd-gcc9 is still the latest and greatest as
far as cross-toolchain gcc goes, though. We still have freebsd-gcc6,
too, so at the very least once we drop freebsd-gcc6 and create
freebsd-gcc10 I'll revisit this and find some way to make it more
generic while still easy to find the port/pkg you need.