Re: Using C++11

[Chris Vine <chris cvine freeserve co uk>]

On Mon, 29 Jun 2015 12:03:04 +0200
Kalev Lember <kalevlember gmail com> wrote:
> On 06/29/2015 08:18 AM, Murray Cumming wrote:
> > On Sun, 2015-06-28 at 20:30 +0100, Chris Vine wrote:
> > > On Sun, 28 Jun 2015 20:17:28 +0200
> > > Murray Cumming <murrayc murrayc com> wrote:
> > > > Given that --std=c+11 breaks ABI compatibility (at least in the
> > > > standard library), I wonder if/when distros would ever build
> > > > glibmm with C++11 support.
> > >
> > > gcc-3.4 and gcc-4.* do not provide libstdc++ with a C++11
> > > compliant ABI (this is mainly concerned with gcc's copy on write
> > > string implementation) and gcc-5.1 does by default do so,
> > [snip]
> >
> > So do you think any apps have been built with C++11 on mainstream
> > distros so far?
>
> All of Fedora 23 (scheduled for release this October / November) is
> built with the new C++11 ABI.

True, but this is orthogonal to the question whether distributions ship
programs "built with C++11", from which I took Murray to mean which use
C++11 features and are compiled with the -std=c++0x or -std=c++11
flags.  Fedora 22 also ships with programs "built with C++11", including
firefox.  Quite probably fedora 21 does so too.

The new C++ ABI covers any C++ program, C++98 or C++11 or whatever,
which uses a version of libstdc++ compiled for the new ABI.  The old
C++ ABI covers any C++ program, C++98 or C++11 or whatever, which uses
a version of libstdc++ compiled for the old ABI.

Chris