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Re: Prohibit enum <-> int mixup

From: Jonathan Wakely <jwakely dot gcc at gmail dot com>
To: Ian Lance Taylor <iant at google dot com>
Cc: gcc-help at gcc dot gnu dot org
Date: Mon, 31 Jan 2011 23:34:30 +0000
Subject: Re: Prohibit enum <-> int mixup
References: <20110129164124.GA27641@nibiru.local> <mcr39obpn8r.fsf@google.com> <20110129204856.GA29226@nibiru.local> <AANLkTi=1eim813RowJe0gya19nemWZPeLp_AwiZucU0S@mail.gmail.com> <AANLkTimua1k+ZkEBgEibggvSMDjiP4+sBgGwNj0moS_b@mail.gmail.com> <20110130201121.GD29226@nibiru.local> <AANLkTinKOkAEfyPyFTbtjtUEe9MvM-AoX7n3ZjCoCvK1@mail.gmail.com> <20110130203231.GE29226@nibiru.local> <AANLkTiktVX2NhxEgWfzXV+QE5bjn0gLVe8OgLz_zzobq@mail.gmail.com> <mcrpqrckhoj.fsf@google.com>

On 31 January 2011 19:16, Ian Lance Taylor wrote:
>
> Using -std=c++0x will cause libstdc++ to build in C++0x mode, which last
> time I checked was not strictly ABI compatible with libstdc++ not built
> in C++0x mode. ?So if you link with a dynamic libstdc++.so, you may get
> in trouble in some complex scenarios.

Do you remember the details?  I thought we'd done a good job of not
breaking the ABI, and have avoided making some changes required by
C+0x because they change the ABI.  I'd like to document the potential
problems if you can remember where the incompatibilities are.

Follow-Ups:
- Re: Prohibit enum <-> int mixup
  - From: Ian Lance Taylor

References:
- Prohibit enum <-> int mixup
  - From: Enrico Weigelt
- Re: Prohibit enum <-> int mixup
  - From: Ian Lance Taylor
- Re: Prohibit enum <-> int mixup
  - From: Enrico Weigelt
- Re: Prohibit enum <-> int mixup
  - From: Jonathan Wakely
- Re: Prohibit enum <-> int mixup
  - From: Jonathan Wakely
- Re: Prohibit enum <-> int mixup
  - From: Enrico Weigelt
- Re: Prohibit enum <-> int mixup
  - From: Jonathan Wakely
- Re: Prohibit enum <-> int mixup
  - From: Enrico Weigelt
- Re: Prohibit enum <-> int mixup
  - From: Jonathan Wakely
- Re: Prohibit enum <-> int mixup
  - From: Ian Lance Taylor

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