Re: [boost] Re: shared_object added to files

From: David Abrahams (david.abrahams_at_[hidden])
Date: 2001-12-17 19:14:10

----- Original Message ----- 
From: "mfdylan" <dylan_at_[hidden]>

> 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.