Re: [PATCH] libstdc++ ABI issues with __int128

[Jakub Jelinek <jakub at redhat dot com>]

On Sat, Mar 19, 2011 at 10:19:04AM +0100, Jakub Jelinek wrote:
> On Wed, Mar 16, 2011 at 10:05:41AM -0700, Benjamin Kosnik wrote:
> > 
> > Here's the 4_6-branch version, approved by Jakub.
> 
> Comparing the additions in x86_64-linux libstdc++, I still see a couple of
> wrong exports, in particular since gcc 4.5 the following symbols
> 
> _ZTIn@@CXXABI_1.3 OBJECT WEAK DEFAULT 16
> _ZTIo@@CXXABI_1.3 OBJECT WEAK DEFAULT 16
> _ZTIPKn@@CXXABI_1.3 OBJECT WEAK DEFAULT 32
> _ZTIPKo@@CXXABI_1.3 OBJECT WEAK DEFAULT 32
> _ZTIPn@@CXXABI_1.3 OBJECT WEAK DEFAULT 32
> _ZTIPo@@CXXABI_1.3 OBJECT WEAK DEFAULT 32
> _ZTSn@@CXXABI_1.3 OBJECT WEAK DEFAULT 2
> _ZTSo@@CXXABI_1.3 OBJECT WEAK DEFAULT 2
> _ZTSPKn@@CXXABI_1.3 OBJECT WEAK DEFAULT 4
> _ZTSPKo@@CXXABI_1.3 OBJECT WEAK DEFAULT 4
> _ZTSPn@@CXXABI_1.3 OBJECT WEAK DEFAULT 3
> _ZTSPo@@CXXABI_1.3 OBJECT WEAK DEFAULT 3
> 
> were added.  Those surely need to go into CXXABI_1.3.5, not CXXABI_1.3,
> as they weren't exported in gcc 3.4 (nor 4.5).
> Plus, I believe we aren't exporting new _ZTS* symbols for some time, only
> _ZTI*, right?

And another question is, we still export a bunch of new _ZTS* symbols, isn't
that now pointless when we always do strcmp anyway?

I'm talking about
_ZTSSt16nested_exception@@CXXABI_1.3.5 OBJECT WEAK DEFAULT 21
_ZTSNSt13__future_base11_State_baseE@@GLIBCXX_3.4.15 OBJECT WEAK DEFAULT 33
_ZTSNSt13__future_base12_Result_baseE@@GLIBCXX_3.4.15 OBJECT WEAK DEFAULT 34
_ZTSSt11regex_error@@GLIBCXX_3.4.15 OBJECT WEAK DEFAULT 16
_ZTSSt12bad_weak_ptr@@GLIBCXX_3.4.15 OBJECT WEAK DEFAULT 17
_ZTSSt17bad_function_call@@GLIBCXX_3.4.15 OBJECT WEAK DEFAULT 22
here.

	Jakub