https://bugs.llvm.org/show_bug.cgi?id=43749
Louis Dionne <ldio...@apple.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ldio...@apple.com
Resolution|--- |INVALID
Status|NEW |RESOLVED
Assignee|unassignedb...@nondot.org |ldio...@apple.com
--- Comment #2 from Louis Dionne <ldio...@apple.com> ---
What compiler are you using? I'm guessing you're using a fairly old Clang.
The issue is that the compiler emits type information for fundamental types in
libc++abi, and your compiler doesn't know about char8_t yet, so it doesn't emit
the type information for those. libc++abi tries to export these symbols and it
fails to do so, because they haven't been generated in the dylib by the
compiler.
Getting a linker error is quite nice, because otherwise you'd be producing a
libc++abi.dylib that doesn't work properly at runtime (say if you try to use
typeid(char8_t) in your program).
The fix is to use a recent Clang when building libc++ and libc++abi.
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