[llvm-dev] LLJIT: __{math}_finite symbols not resolved ?

[Jean-Michaël Celerier via llvm-dev]

Hello,
when building code with -Ofast -ffinite-math-only -ffast-math, clang
generates calls to "finite" variants of math functions.

This has been the source of a fair amount of issues in a "normal", non-JIT
pipeline, which seem to have been fixed over time - a simple fix being
recompiling the target app against the new glibc.
- https://bugs.llvm.org/show_bug.cgi?id=44842
- https://github.com/cms-sw/cmssw/issues/24935
- https://github.com/google/filament/issues/2146

But when going through LLJIT (tested with LLVM-10 & LLVM-11, on ArchLinux,
glibc-2.32) I still get

     Symbols not found: [ __log_finite, __exp2_finite ]

when trying to materialize my code.

What could be done for that ? "Recompiling" doesn't seem to fix anything in
this case so it looks like LLJIT lacks the mechanism to understand the ELF
symbol indirection.

Thanks,
Jean-Michaël
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