Re: shared_object added to files

From: mfdylan (dylan_at_[hidden])
Date: 2001-12-17 19:42:31

--- In boost_at_y..., "David Abrahams" <david.abrahams_at_r...> wrote:
> 
> ----- Original Message ----- 
> From: "mfdylan" <dylan_at_m...>
> 
> > Unix has no way that I'm aware of for specifying that an entry 
point 
> > with external linkage should NOT be exported from a shared 
object.  
> > To me this is a mistake, as for instance in a recent project 
where we 
> > compiled some old code into a shared object that was used purely 
for 
> > reading files from an older software version.  The shared object 
made 
> > use of older versions of some our library classes, that were not 
> > compatible with the newer versions.  Under Windows this was no 
> > problem, but under some flavours of Unix for instance, the 
destructor 
> > for the wrong version of the class was getting called and causing 
> > mayhem.  We had to rename the class to avoid the problem.
> > I'd still like to find a solution to this, if anyone has one, by 
the 
> > way...
> 
> The best known way to deal with that is with version namespaces:
> 
> namespace boost_1_26_0
> {
> 
>    ....
> }
> 
> namespace boost = boost_1_26_0;
> 
> I imagine it's a lot of work, though.

Especially when two of your compilers don't even support 
namespaces :o)
If they did that's exactly what I'd do.

Dylan