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Re: GCC version bikeshedding
- From: Jakub Jelinek <jakub at redhat dot com>
- To: Richard Biener <richard dot guenther at gmail dot com>
- Cc: Eric Botcazou <ebotcazou at libertysurf dot fr>, Ian Lance Taylor <iant at google dot com>, GCC Development <gcc at gcc dot gnu dot org>, Jason Merrill <jason at redhat dot com>
- Date: Wed, 6 Aug 2014 11:06:35 +0200
- Subject: Re: GCC version bikeshedding
- Authentication-results: sourceware.org; auth=none
- References: <20140720165506 dot GT3003 at laptop dot redhat dot com> <201407291845 dot 14107 dot ebotcazou at libertysurf dot fr> <CAKOQZ8whj_m9yjYVdX_p24ocV25VRZwwmTf=VvGjEoxNeHbxSg at mail dot gmail dot com> <201408060925 dot 48414 dot ebotcazou at libertysurf dot fr> <20140806074223 dot GY7393 at tucnak dot redhat dot com> <CAFiYyc1+LTfbPF=nT3O4pA4ST6Z2X5FJ0ywMxL9bk3UsqwnV2w at mail dot gmail dot com> <20140806084803 dot GB7393 at tucnak dot redhat dot com> <CAFiYyc0+YgrRA-CheSFx5not6XadTWOa-mr_LWpX4sZ_gQMgdg at mail dot gmail dot com>
- Reply-to: Jakub Jelinek <jakub at redhat dot com>
On Wed, Aug 06, 2014 at 11:04:14AM +0200, Richard Biener wrote:
> > - libstdc++ ABI changes (it is a significant user visible change,
> > if you rebuild everything, no extra effort is needed, but otherwise
> > if you want some C++ code built with older compilers work together
> > with code built with newer compilers, it might require source code
> > changes (the abi_tag attribute additions where needed and warning
> > suggest to put those at), at least that is my current understanding
> > of the plans
>
> But that's only with -std=c++11? Which had no compatibility
> guarantees before?
No, AFAIK it is also -std=c++98. At least my understanding was that
std::list and std::string are going to change ABI (and get new abi_tag)
in all C++ modes. Jonathan/Jason/Paolo, is that right?
Jakub