From: Csaba Raduly <rcsaba@gmail.com>
To: cygwin list <cygwin@cygwin.com>
Subject: Re: Updated: gcc-5.2.0-1 (Test x86/x86_64)
Date: Wed, 07 Oct 2015 07:45:00 -0000 [thread overview]
Message-ID: <CAEhDDbCxA9sA8DQzFXAC=8=H9aEHrytf8Ete99MwEdp+1U-uHw@mail.gmail.com> (raw)
In-Reply-To: <56144739.7040602@tiscali.co.uk>
On Wed, Oct 7, 2015 at 12:12 AM, David Stacey wrote:
>
> On 06/10/15 18:51, Ken Brown wrote:
(snip)
>>
>>
>> What about the following scenario: Package P links against library L. Library L is rebuilt to use the new ABI. Isn't it possible that package P will then have to be rebuilt as well?
>
>
> My understanding is that if 'L' is built with -D_GLIBCXX_USE_CXX11_ABI=0 then P wouldn't need to be rebuilt (I haven't tested that, though). However, this compiler switch loses some C++11 features of the STL, so it isn't a magic cure.
>
If you use -D_GLIBCXX_USE_CXX11_ABI=0, you're stuck with the COW (the
old std::string implementation in libstdc++ which uses copy-on-write;
this is not standard-conforming anymore). std::list::size() remains
O(n) instead of the newly mandated O(1).
AFAIK, that's it.
Csaba
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next prev parent reply other threads:[~2015-10-07 7:45 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <560BC46D.3060500@gmail.com>
2015-09-30 16:06 ` David Stacey
2015-09-30 22:34 ` JonY
2015-09-30 23:36 ` David Stacey
2015-10-01 13:04 ` cyg Simple
2015-10-06 16:26 ` Christian Franke
2015-10-06 17:51 ` Ken Brown
2015-10-06 22:12 ` David Stacey
2015-10-07 7:45 ` Csaba Raduly [this message]
2015-10-06 22:20 ` David Stacey
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