re: port-sparc/58352: ld: /usr/lib/libubsan.so: undefined reference to `__sync_val_compare_and_swap_8'

[matthew green <mrg%eterna23.net@localhost>]

Rin Okuyama writes:
> After some investigation, I've found that sanitizer already
> has its own 64-bit atomic ops for platforms without them.
>
> With the attached patch:
> - libasan works on i386
> - libubsan works on i386, powerpc, and vax (with WIP patches)
>
> Yes, this adds some performance penalty for these platforms,
> however, it is better than having extra diff to upstream, IMO.

nice!  this seems more maintainable, if slower, and i suspect
32-bit platform users doing this are less common anyway.

amused it is (a) in "sanitizer_atomic_clang.h", which is also
used by GCC, and (b) includes "sanitizer_atomic_clang_mips.h",
which has nothing mips- or clang- specific in it.

thanks.


.mrg.