Re: [boost] bug-sprint #2114, 2 comments

Subject: Re: [boost] bug-sprint #2114, 2 comments
From: Juergen Hunold (juergen.hunold_at_[hidden])
Date: 2009-06-10 08:15:20

Hi Alexander,

On Wednesday 10 June 2009 14:03:43 Alexander Arhipenko wrote:
> On Wed, Jun 10, 2009 at 11:04 AM, Juergen
> Hunold<juergen.hunold_at_[hidden]> wrote:
>
> [snip]
>
> > That means "__attribute__((visibility("default")))", right ?

Okay. 
I've done some short experimenting and found some issues with 
BOOST_SYMPOL_IMPORT expand to nothing in our code. It seems necessary to 
declare some templated classes with 'visibility "default"' when they are 
imported. 
I'll have to do some more research on this.
(and I lost the start of the thread due to human error, so no quotes ;-))

> In response to above:
> I have written down 2 sample configuration files for the 'foo' library.

Yes, looks good.

[snip]

> But, all these could be not enough for the sophisticated user.
> Assume, library 'bar' will use library 'foo' as an implementation detail
> and also will catch all the foo's exceptions. So, bar's maintainer doesn't
> want to re-export foo's stuff from his library. 

This is the gcc case, right ? With msvc, you have to "re-export" the used 
symbols anyway (by marking them "__dllimport". So why do you want to hide the 
symbols with gcc ? 

> I've attached minimal bbv2 project that reproduce the problem
> with uncaught exception. To eliminate it, you can do the following:
> a) Replace FOO_DECL with FOO_EXCEPTION_DECL in Error class declaration
> b) Uncomment ~Error() declaration (foo/error.hpp) and definition
> (foo/foo.cpp)

I'll take a look at it. 
Please be patient...

Yours,

Jürgen
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