Re: Wrong class export/visibility setting for shared libs in many Boost libs

From: Peter Dimov (pdimov_at_[hidden])
Date: 2021-02-02 14:56:18

Alexander Grund wrote:

> What about classes, which have a non-inline function, e.g. the recently 
> mentioned exception class with a non-inline `what()`?
> Wouldn't that need to be IMPORT/EXPORT declared for Windows? And VISIBLE 
> for Linux (to be caught)? So would you need both here?

I suspect that for exported exception classes the right thing to do would 
indeed be to declare them both _DECL and _VISIBLE. _EXPORT mapping to 
_VISIBLE is kind of a hack (that often does the right thing) but it's not 
enough here.

However, repeating the visibility attribute may be an error.