[llvm-bugs] [Bug 30643] libc++experimental built w/ UBSAN has undefined references to __muloti4 builtin

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=30643

Eric Fiselier <eric at efcs.ca> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|FIXED                       |---
           See Also|                            |https://bugs.llvm.org/show_
                   |                            |bug.cgi?id=16404

--- Comment #2 from Eric Fiselier <eric at efcs.ca> ---
We once again use __int128_t in filesystem, so this bug has cropped up again.

I think as a temporary fix, libc++ can crib the mul0ti4 implementation from
compiler-rt and compile it into filesystem manually.

I'll look into more involved fixes as well.

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