Re: normal ltdl linking suggestions?

[Gary V. Vaughan]

Hallo Andreas,

On Jul 10, 2007, at 3:57 AM, Andreas Jellinghaus wrote:
> If you like to discuss those technical issues now, i'd be happy to  
> hear more
> about the complexity of applications using libraries using  
> libraries loading
> plugins using libraries using libraries loading plugins using  
> libraries using
> libraries and what happends with duplicate symbols in this  
> situation on all
> plattforms, possibly even those symbols being from different  
> versions of a
> library and thus maybe incompatible.

It won't work on at least several platforms... possibly not on any  
platform.
Certainly duplicate symbols from different versions of the same  
library will
cause runtime problems even if the linker doesn't raise a red flag.

> the only way I know to avoid problems is
> to require the library being a shared library, so that if it is  
> used in
> several places the dynamic linker makes sure the same  
> implementation is used,
> and versioning magic in ld can work if needed.

Another way to do it is like CVS HEAD m4: it provides a library that  
is in
turn linked against the bundled libltdl, and all plugins must link  
against
that library to ensure they are all calling the same libltdl.

Cheers,
        Gary
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