Re: EXPORT_SYMBOL question

[Josef E. Galea]

Sam Ravnborg wrote:

> On Mon, Mar 28, 2005 at 01:10:35PM +0200, Josef E. Galea wrote:
>  
>
> > Hi,
> >
> > I have 2 modules. The first one uses EXPORT_SYMBOL to make some function 
> > available to other modules. These prototypes for these functions were 
> > also put in a header file. Now the second module uses the functions the 
> > functions defined in the first module by and includes the afore 
> > mentioned header file. However when i'm compiling the module, I get a 
> > symbol underfined warning. When I load the module it works as expected. 
> > Is there any way to get rid of these warnings.
> >
> > Another problem I'm having is that when I load the second module I get 
> > `no version for "rbnode_initialize" found: kernel tainted.' 
> > (rbnode_initialize is one of the functions exported by the first 
> > module). Both MODULE_LICENSE("GPL"); and MODULE_VERSION are declared in 
> > the two modules. Is there anything I'm missing?
> >    
>
> You need to compile both modules at the same time.
> Do something like this for your two modules foo and bar:
>
> modules/Makefile
> obj-y := foo/ bar/
> modules/foo/	<= Your foo module
> modules/bar/	<= Your bar module
>
> Then when building the modules stay in modules/ and
> execute:
> make -C <path-to-kernel-src> M=`pwd`
>
> And to install modules:
> make -C <path-to-kernel-src> M=`pwd` modules_install
>
> 	Sam
>
>  
Thanks for your help. That solved both the warnings and the kernel 
tainted message.

Josef
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