Stupid libatomic dependencies

[Martin Husemann <martin%duskware.de@localhost>]

Hey folks,

I see this on macppc with NetBSD-current:

=> Returning to build of ffmpeg5-5.0.1nb1
=> Full dependency libxml2>=2.9.13nb1: found libxml2-2.9.14
=> Full dependency libatomic>=10.0: NOT found
=> Verifying update for ../../devel/libatomic
===> Skipping vulnerability checks.
=> Bootstrap dependency digest>=20211023: found digest-20220214
=> Fetching gcc-12.1.0.tar.xz


I understand this is the "plug & play" solution in pkgsrc for papering
over stupid upstreams that think atomic 64bit operations are a must-have.

But it is really suprising (and very heavy) in this context.

Can we avoid it with some cpu option for local builds at least (like it
is possible for i386)?

Martin