Date: Fri, 16 Oct 2020 09:47:18 -0700 From: John Baldwin <jhb@FreeBSD.org> To: Kyle Evans <kevans@FreeBSD.org>, src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r366766 - head Message-ID: <5475d244-b507-d369-46c1-2b75c02a8645@FreeBSD.org> In-Reply-To: <202010161516.09GFGNUI015980@repo.freebsd.org> References: <202010161516.09GFGNUI015980@repo.freebsd.org>
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On 10/16/20 8:16 AM, Kyle Evans 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`. gcc9 is probably still a bit premature. 'make USE_GCC_TOOLCHAINS=yes tinderbox' still uses gcc6 as I still have several open reviews for gcc9 fixes, though OpenZFS regressed the build for both gcc6 and gcc9 as Adrian is finding. I think I would also just suggest 'pkg install ${TARGET_ARCH}-gcc6' rather than building the port. That is what 'make tinderbox' suggests. -- John Baldwin
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