[Bug 236062] [exp-run] Against projects/clang800-import branch

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=236062

--- Comment #4 from Dimitry Andric <dim at FreeBSD.org> ---
(In reply to Jan Beich from comment #3)
> Can you expedite landing in order to MFC to /stable/11 and /stable/12
> *before* the slush?

Sure, I'm fine with that.  I requested this exp-run specifically to ensure that
there are no major problems with ports.  And indeed, the number of failures
seems to be quite low, and most are easy to fix (if a bit cumbersome).

> -Werror bustage with few if any blocked ports can be safely ignored for the
> maintainers are often at fault for keeping the flag by default. In many
> cases -Werror is used together with -Wall, -Wextra, -Weverything, etc. which
> practically asks for bustage on compiler upgrade.

Yup, let's suppress those warnings, unless they are trivial to fix.


> Once FreeBSD 12.0 reaches EOL I'd like to start lifting LLD_UNSAFE. LLD 8
> would help with that e.g., bug 233740 comment 10.
> 
> If C++20 is released during FreeBSD 11.3/12.1 lifetime ports may have
> growing pains because libc++ cannot be easily replaced. And USES=compiler
> better remain nop to avoid exp-run churn.

The C++20 support in libc++ 8.0 is obviously not 100% finished either, but it's
pretty OK for at least some time.

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