Re: Forth for Mac OS X Leopard (Intel) - what are the options?

Albert van der Horst <albert@[EMAIL PROTECTED]
> wrote:
> In article <iHJLj.2992$dg.2176@[EMAIL PROTECTED]
>,
> Josh Grams  <josh@[EMAIL PROTECTED]
> wrote:
>>Robert Spykerman <robert.spykerman@[EMAIL PROTECTED]
> wrote:
>>
>>> Albert sections his code very nicely into 2 user defined sections,
>>> forth and dictionary - dictionary being unitialized for further
>>> additions, with the exec flag on.
>>>
>>> This appears to build without a fuss on linux. On OSX, the tools give
>>> out big stink about there not being a .text, data,
>>
>>That's BSD for you.  You are required to have .text and .data, so you
>>might as well use them.  The other thing you could do (which might save
>>a bit of space in the executable is to put everything in .text, have an
>>empty .data, and then immediately mprotect() everything to rwx.  But
>>your way seems fine to me.
>
> Without a fuzz? Not quite.

Sorry, I can't make sense of that...

> I should have shown the actual build commands on linux before. This is
> an excerpt of my Makefile:
>
> glina : ci86.lina.s ; as $+; \
>     strip a.out --strip-unneeded -R .bss -R .data -R .text ; \
>     ld a.out -o $@[EMAIL PROTECTED]
  ; strip $@[EMAIL PROTECTED]
 -s -R .bss
>
> So immediately after assembling I got rid of everything unneeded
> and specifically of the .data and .text segment.
> The loader doesn't complain if those are absent, on linux, but
> it does add a gratituous .bss segment.
> That is stripped too.

On Linux, yes.  But the BSD systems I've seen are pickier.  Even if
you're not doing dynamic linking (and hence don't need any section
headers), they won't run your ELF unless it has at least .text and .data
section headers (AFAICT).  Have you had a different experience with BSD?

I hope I'm not missing your point again...

> Then as part of SAVE-SYSTEM all sections are killed anyway.
> The program is just loaded, using the "program" information
> in the header.
>
> This is how lina looks after stripping of symbols and SAVE-SYSTEM.

Nice and clean.  But I haven't been able to get an executable like that
to run under BSD.  At least not under the BSD ABI or whatever you call
it -- I don't think I tried with the Linux emulation layer.

--Josh