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Re: RFC: PATCH to add abi_tag attribute

From: Jason Merrill <jason at redhat dot com>
To: Florian Weimer <fweimer at redhat dot com>
Cc: gcc-patches List <gcc-patches at gcc dot gnu dot org>
Date: Sun, 11 Nov 2012 23:58:50 -0500
Subject: Re: RFC: PATCH to add abi_tag attribute
References: <50988C19.8080905@redhat.com> <509FA1AF.1070302@redhat.com>

On 11/11/2012 08:01 AM, Florian Weimer wrote:

I'm not sure if this sufficiently far-reaching.  It seems that this
doesn't allow me to implement a virtual function which takes a
std::string parameter in new-ABI-mode when the base class is also used
in old-ABI-mode.

Ah, yes; since virtual functions are called through the vtable the signatures of virtual functions are also part of the class ABI, so the base class also needs to be tagged. I guess I should add that to -Wabi-tag.

Jason

Follow-Ups:
- Re: RFC: PATCH to add abi_tag attribute
  - From: Jason Merrill

References:
- RFC: PATCH to add abi_tag attribute
  - From: Jason Merrill
- Re: RFC: PATCH to add abi_tag attribute
  - From: Florian Weimer

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