On 15 Jan 2018, at 17:00, Jan Beich <jbe...@freebsd.org> wrote:
> It wouldn't help (see below). Clang 6 accidentally made __atomic* work
> enough to satisfy configure check but not for the port to build. I guess,
> it also confuses configure in net/librdkafka and net-mgmt/netdata.

Can we (by which I probably mean emaste@) push out an EN that adds the atomic.c 
from compiler-rt to our libgcc_s?  That should provide all of these helper 
functions.  Clang assumes that they exist because both compiler-rt and vaguely 
recent libgcc_s provide them.  Recent GCC will also assume that they exist and 
so the correct fix is probably for us to make them to exist.

If this is difficult, then we can perhaps provide a port that compiles atomic.c 
into libatomic_fudge.so or similar and provides a libgcc_s.so that’s a linker 
script that forces linking to libatomic_fudge.so and libgcc_s.so.


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