K 10
svn:author
V 3
dim
K 8
svn:date
V 27
2021-12-25T12:02:35.444602Z
K 7
svn:log
V 692
compilert-rt: build out-of-line LSE atomics helpers for aarch64

Both clang >= 12 and gcc >= 10.1 now default to -moutline-atomics for
aarch64. This requires a bunch of helper functions in libcompiler_rt.a,
to avoid link errors like "undefined symbol: __aarch64_ldadd8_acq_rel".

(Note: of course you can use -mno-outline-atomics as a workaround too,
but this would negate the potential performance benefit of the faster
LSE instructions.)

Bump __FreeBSD_version so ports maintainers can easily detect this.

PR:		257392
MFC after:	2 weeks

(cherry picked from commit cc55ee8009a550810d38777fd6ace9abf3a2f6b4)

Git Hash:   1a398266112e73f91a4f2e2701ceefd3f2948aac
Git Author: dim@FreeBSD.org
END