Re: [Caml-list] Re: Problems linking in an object file produced with "ocamlopt -c -output-obj"

[skaller <skaller@users.sourceforge.net>]

On Tue, 2005-05-17 at 16:14, Corey O'Connor wrote:
> > _caml_atom_table
> > _caml_static_data_end
> > _caml_static_data_start
> > _caml_code_area_end
> > _caml_code_area_start
> 
> Umm.. Well. I changed asmrun/startup.c from:
> char * caml_static_data_start, * caml_static_data_end;
> char * caml_code_area_start, * caml_code_area_end;
> 
> To:
> char * caml_static_data_start, * caml_static_data_end = NULL;
> char * caml_code_area_start, * caml_code_area_end = NULL;
> 
> And *poof*, the errors went away. 
> 
> This is under Mac OS X 10.4 for what it's worth. Maybe something
> changed with GCC 4.0 effecting the export of extern variables with no
> initializers?

See ISO C99, 6.9.2./1

Variables with external linkage must be defined exactly
once (if they're used) or at most once (if they're not).

The above fragments do not constitute an external
definition, an initialiser is required for that.

The Ocaml sources are incorrect, you patch fixes them.
This should go in the bug tracker. 

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