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

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

--- Comment #36 from Dimitry Andric <dim@FreeBSD.org> ---
(In reply to Guillaume Outters from comment #30)
Yeah, I've done that too now, and CC=clang CXX=clang++ makes it at least
generate and use profiling information, e.g.: 

clang -pthread -c -fno-strict-overflow -Wsign-compare -Wunreachable-code
-DNDEBUG -g -O3 -Wall    -std=c11 -Wextra -Wno-unused-parameter
-Wno-missing-field-initializers -Wstrict-prototypes
-Werror=implicit-function-declaration -fvisibility=hidden
-fprofile-instr-use=/home/dim/obj/cpython-3.13.1/code.profclangd
-I/share/dim/src/python/cpython/Include/internal
-I/share/dim/src/python/cpython/Include/internal/mimalloc -IObjects -IInclude
-IPython -I. -I/share/dim/src/python/cpython/Include    -DPy_BUILD_CORE -o
Programs/python.o /share/dim/src/python/cpython/Programs/python.c

But I see no crashes at all, it builds just fine to the end. Currently running
the test suite.

I'm not sure if LTO is enabled in this case, though.

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