Date: Fri, 17 Nov 2006 10:57:24 +0300 From: Ruslan Ermilov <ru@freebsd.org> To: Alexander Kabaev <kabaev@gmail.com> Cc: freebsd-fs@freebsd.org, freebsd-current@freebsd.org, Andriy Gapon <avg@icyb.net.ua>, Jung-uk Kim <jkim@freebsd.org> Subject: Re: ZFS patches for FreeBSD. Message-ID: <20061117075724.GB21627@rambler-co.ru> In-Reply-To: <20061116215639.73d00824@kan.dnsalias.net> References: <1163701391.00638085.1163691003@10.7.7.3> <455CB8CA.8040603@icyb.net.ua> <200611161506.58128.jkim@FreeBSD.org> <20061116215639.73d00824@kan.dnsalias.net>
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On Thu, Nov 16, 2006 at 09:56:39PM -0500, Alexander Kabaev wrote:
> On Thu, 16 Nov 2006 15:06:56 -0500
> Jung-uk Kim <jkim@FreeBSD.org> wrote:
>=20
> > On Thursday 16 November 2006 02:15 pm, Andriy Gapon wrote:
> > > Hmm, I saw errors like this with some other 3rd party kernel module
> > > when its sources had constructs like:
> > >
> > > struct some_struct s =3D {0};
> > >
> > > Changing the above initialization to explicit bzero() call helped
> > > in that case, but I think that there should be some compiler flags
> > > or something to handle this.
> >=20
> > AFAIK, there was no way to handle this GCC bug with compiler flags. =20
> > '-ffreestanding' should prevent this to happen but it does not. As=20
> > Max Laier pointed out, it was discussed long time ago. Bruce Evans=20
> > had good analysis on this issue, too.
> >=20
> This is not a GCC bug. -ffreestanding is _documented_ as requiring
> memset and friends as resolvable extern symbols. We were just lucky to
> get away without it before.
>=20
Yes. But to make it clear: it's there in libkern.h, just not external.
Cheers,
--=20
Ruslan Ermilov
ru@FreeBSD.org
FreeBSD committer
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