From: Warren Young
Date: April 28 2006 10:25am
Subject: Re: Unresolved symbols in Query (Lockable)
List-Archive: http://lists.mysql.com/plusplus/5668
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Pedro Lamarão wrote:
> "Query::lock" and "Query::unlock" are really missing the DLL

They're private member functions -- there is no reason why they should 
be accessible in the DLL's interface.

> I tried adding MYSQLPP_EXPORT to Lockable's
> members, but that didn't do the trick for me.

If you wanted to try and "fix" this, you'd add MYSQLPP_EXPORT to lock() 
and unlock() in query.h, not lockable.h.  lockable.h just declares 
virtual member functions, it doesn't define anything that could be 
exported in the DLL interface.