Re: ZFS patches for FreeBSD.

On Thu, 16 Nov 2006 15:06:56 -0500
Jung-uk Kim <jkim_at_FreeBSD.org> wrote:

> 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 = {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.
> 
> AFAIK, there was no way to handle this GCC bug with compiler flags.  
> '-ffreestanding' should prevent this to happen but it does not.  As 
> Max Laier pointed out, it was discussed long time ago.  Bruce Evans 
> had good analysis on this issue, too.
> 
> Jung-uk Kim
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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.

-- 
Alexander Kabaev