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Subject: Re: atomic in i386 Current after CLANG 6 upgrade
From: David Chisnall <theraven@FreeBSD.org>
In-Reply-To: <mv1f-jbvo-wny@FreeBSD.org>
Date: Mon, 15 Jan 2018 17:08:58 +0000
Cc: Tijl Coosemans <tijl@FreeBSD.org>, Luca Pizzamiglio <pizzamig@freebsd.org>,
 FreeBSD Current <freebsd-current@freebsd.org>, freebsd-ports@freebsd.org
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 <mv1f-jbvo-wny@FreeBSD.org>
To: Jan Beich <jbeich@FreeBSD.org>, Ed Maste <emaste@FreeBSD.org>
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On 15 Jan 2018, at 17:00, Jan Beich <jbeich@FreeBSD.org> wrote:
>=20
> 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.
>=20

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=E2=80=99s a linker script that forces linking to libatomic_fudge.so =
and libgcc_s.so.

David