[Bug c++/33871] [4.3 Regression] typeinfo name referenced in ... defined in discarded section

["rguenther at suse dot de" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #19 from rguenther at suse dot de  2007-10-30 18:44 -------
Subject: Re:  [4.3 Regression] typeinfo name referenced in
 ... defined in discarded section

On Tue, 30 Oct 2007, geoffk at geoffk dot org wrote:

> On 30/10/2007, at 11:07 AM, rguenth at gcc dot gnu dot org wrote:
> 
> > ------- Comment #16 from rguenth at gcc dot gnu dot org  2007-10-30  
> > 18:07 -------
> > Geoff, your patch changed the typeinfo symbols for anonymous  
> > namespaces from
> > having weak linkage to non-weak linkage.  This caused the  
> > regression.  Do you
> > argue this change was deliberate and is the right thing?  Why do you  
> > think so?
> > Can you please restore the old behavior which is also that of other  
> > compilers
> > for the linux targets?
> 
> No, it changed the typeinfo symbols from being externally visible and  
> having weak linkage, to not being externally visible in which case the  
> weak-ness does not matter.
> 
> The change is correct and necessary.  You cannot access an anonymous  
> namespace from outside the translation unit it is defined in, so the  
> associated symbols do not need to be externally visible, and the  
> change is correct.  It is necessary if you do not use random strings  
> in the symbol names, because otherwise the symbols will conflict.
> 
> It does not matter what other compilers do, this is not an ABI issue.

I see.  So where is the bug here?  We obviously see application builds
fail because of this.

Richard.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33871