Re: standard runtime for (possible/hopeful) 64bit kernels

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

On Fri, Mar 13, 2009 at 06:39:19PM +0900, Toru Nishimura wrote:
> Hypothetic NetBSD/powerpc64 and NetBSD/mips64
> will be bi-architecture OSes like sparc64 and amd64
> where 32bit binaries work just as 64bit natives
> out-of-box.  I wonder NetBSD would follow L* way for
> them;

Both sparc64 and amd64 default to 64bit userland but provide -m32 support
to create 32bit binaries. For sparc the difference is marginal (i.e. it
very much depends on your application if 32bit or 64bit is better), but for
amd64 the difference is probably noticable due to the very different ABI.

Of course this does not mean that ppc64 or mips64 would have to choose the
same default.

Martin