Build 32 bit binaries on amd64

[Dan McGregor]

On 22 August 2012 14:09, Tijl Coosemans <tijl at freebsd.org> wrote:
> On 21-08-2012 17:04, Dan McGregor wrote:
>> My solution is certainly fairly hacky, I just took inspiration from
>> NetBSD. I wanted to see if it could be done.  While I was there I did
>> identify several files that should be common between i386 and amd64,
>> such as exec.h.
>>
>> Since reading your email I started looking at the x86 common code,
>> and have made some more code common; specifically asm.h ans
>> ucontext.h.  I'll be putting that on github shortly.
>>
>> Since it does look like tijl hasn't committed anything since March,
>> I would like to co-operate and see what his plans were.  The idea of
>> merging the i386 and amd64 headers into a common area seems like a
>> better idea to me.
>
> For now my goal was to merge headers that can be used by user code so
> it can be compiled with -m32. Eventually, I think it would be nice to
> merge all headers and install x86/ as machine/ for both i386 and amd64.
> That would make the x86 headers similar to powerpc and mips headers
> (and arm when 64bit support is added there).
>
> I think I still have one or two (untested) patches. I'll have a look at
> it during the weekend.
>

That sounds very handy.  I didn't know where you got to, so I've been
plugging away at the same goal for the last couple of days.  Is there
anything specific I could help you with?