Re: closure api problems

[Aaron Patterson <aaron at tenderlovemaking dot com>]

On Mon, Nov 16, 2009 at 09:53:38PM +0100, Andreas Tobler wrote:
> Andrew Haley wrote:
> >Aaron Patterson wrote:
> >>On Mon, Nov 16, 2009 at 07:45:36PM +0000, Andrew Haley wrote:
> >>>Aaron Patterson wrote:
> >>>>I'm running 64bit OS X (Snow Leopard).  Any help would be greatly
> >>>>appreciated!
> >>>I think Snow Leopard forbids exec permission on data memory.
> >>>You need to make sure that FFI_MMAP_EXEC_WRIT is set in closures.c.
> >>That seems to fix it.  Is it safe to define that constant for all
> >>platforms?  Or just Snow Leopard?
> >
> >We could do it for all Sarwin.
> 
> ;)
> 
> I think darwin10+ is enough.
> 
> >>Are you planning a permanent fix for master?
> >
> >Not me, because I can't test it.  Patches welcome.
> 
> Something like this could be ok, untested. You need an autoconfig run.
> 
> [deuterium:~/Desktop/libffi-3.0.9rc3] andreast% diff -u
> configure.ac.orig configure.ac
> --- configure.ac.orig	2009-11-16 21:50:16.000000000 +0100
> +++ configure.ac	2009-11-16 21:51:22.000000000 +0100
> @@ -275,7 +275,7 @@
>  fi
> 
>  case "$target" in
> -    i?86-apple-darwin10* | *-*-freebsd* | *-*-openbsd*)
> +    *-apple-darwin10* | *-*-freebsd* | *-*-openbsd*)
>  	AC_DEFINE(FFI_MMAP_EXEC_WRIT, 1,
>  		  [Cannot use malloc on this target, so, we revert to
>  		   alternative means])
> 
> 
> 

I have to admit that I suck with autotools, /but/, this doesn't seem to
be working for me.  autoconf 2.64 from macports seems to choke:

  $ autoconf
  configure.ac:23: error: m4_copy: won't overwrite defined macro:
  _AC_ARG_VAR_PRECIOUS
  configure.ac:23: the top level
  autom4te: /opt/local/bin/gm4 failed with exit status: 1

Autoconf 2.61 that ships with Snow Leopard works, but it seems like the
constant isn't being defined.  I'm guessing the constant isn't defined
since the sample program still gives a bus error.

Where should I look for that constant to confirm the autoconf worked?

Again, thanks so much for the help.

-- 
Aaron Patterson
http://tenderlovemaking.com/