[Bug 276170] LLVM bug prevents from enabling PGO optimization for Python 3.11+

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=276170

--- Comment #42 from Dimitry Andric <dim@FreeBSD.org> ---
(In reply to Mark Millard from comment #38)
> Looks to me like there is no actual use of C++ in the build.

It's just a habit of passing CC and CXX. :)

(In reply to Mark Millard from comment #40)

> warning: no profile data available for file "_zoneinfo.c" [-Wprofile-instr-unprofiled]

These can be safely ignored. It looks like they are explicitly excluded from
profiling. Upstream will probably have their reasons.

In any case, I also tried a build on 15-CURRENT main-n273771-e8263ace39c8
aarch64, and with both --enable-optimizations and --with-lto, but it all worked
fine.

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