https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=220822

--- Comment #4 from Dimitry Andric <[email protected]> ---
As far as I know, we have never had libatomic support. The problem is that we
still support arches and CPUs which lack a way to do 64 bit atomic operations,
like i486.

The implementations in compiler-rt/lib/builtins are rather unknown to me, and I
am unsure whether we can simply enable these and hope that they work correctly.

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