Mesa compiler specification

[Jan Beich]

Kevin Oberman <rkoberman at gmail.com> writes:

> On Mon, Jan 21, 2019 at 12:33 PM Tobias Kortkamp <tobik at freebsd.org> wrote:
>
>> On Mon, Jan 21, 2019, at 21:20, Kevin Oberman wrote:
>> > I am happy to see mesa-18.3.2 has made it to ports. Thanks, Jan.
>> >
>> > I do have one question/request... Can the mesa ports be updated to allow
>> > compilation with either llvm60 or llvm70? I have been compiling with
>> llvm70
>> > fora few weeks with no problems. It both compiles and runs fine. It was
>> the
>> > only remaining port on my system requiring llvm60 and I suspect that I am
>> > not alone in this.
>>
>> You can do this by simply setting MESA_LLVM_VER=70 in make.conf.
>>
>
> Thanks but it is not really the proper way to solve the problem. This is
> something that should "just work" and not require figuring out what needs
> to be added to make.conf. At least a note in a pkg-message would help.

DEFAULT_VERSIONS+=llvm=70 (already default) syntax would apply to mesa-dri
after v2 in https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=230789 lands.

Once devel/llvm80 appears it'd be time to prepare for LLVM_DEFAULT bump,
patching consumers and asking port maintainers for feedback until actual
release happens. Based on results consumers not ready would be temporarily
kicked out from LLVM_DEFAULT train, or maybe someone provides a better idea.
llvm80 stabilization is partially dependent on how much help clang800-import
effort receives.

Note, LLVM_DEFAULT is defined in Mk/bsd.default-versions.mk