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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