Re: Exporting symbols between modules

simon guinot
2005-08-24T14:59:22Z

hello

On Wed, 24 Aug 2005 09:28:08 +0200
Sergio Paracuellos <sparacuellos@lock-linux.com> wrote:

> Hi all,
>
> I'm new in this list and I have some problems exporting symbols in a
> module to see them in other module.
>
> In the module I want to export the symbol I do:
>
> tList list;
> EXPORT_SYMBOL(list);

ok... you've better to use the EXPORT_SYMBOL_NOVERS macro to export the symbol whiteout the versioning information...
don't forget to define EXPORT_SYMTAB before include module.h...
you can add a -DEXPORT_SYMTAB in your Makefile or a #define EXPORT_SYMTAB before
#include <linux/module.h> in your source file...

>
> I compile it and install without any problem.
>
> And in the module I want to use them I declare list with "extern"
> prototype:
>
> extern tList list;
>
> When I compile the module It says me that list is undefined, and I don't
> know what I am doing wrong.

a compilation error or a loading error ?
are you sure to have well defined the type tList in your "client" module ?
may be a shareed header between your modules is missing :)

regards

simon