[cfe-dev] Setting default dialect to C++11

[Hal Finkel via cfe-dev]

On 02/26/2017 07:38 PM, David Majnemer via cfe-dev wrote:
>
>
> On Fri, Feb 24, 2017 at 1:11 PM, Richard Smith via cfe-dev 
> <cfe-dev at lists.llvm.org <mailto:cfe-dev at lists.llvm.org>> wrote:
>
>     On 24 February 2017 at 12:33, Robinson, Paul via cfe-dev
>     <cfe-dev at lists.llvm.org <mailto:cfe-dev at lists.llvm.org>> wrote:
>
>         Is it about time to advance Clang's default C++ dialect to C++11?
>         It has been stuck on 98/03 for quite some time now.
>
>
>     See http://lists.llvm.org/pipermail/cfe-dev/2016-June/049725.html
>     <http://lists.llvm.org/pipermail/cfe-dev/2016-June/049725.html>
>     for some prior discussion on this.
>
>     Generally I think this is overdue, and that we should go straight
>     to C++14 rather than stopping at C++11 (like GCC did).
>
>
> This policy makes sense. With GCC's change, projects must explicitly 
> specify a -std if they insist on a particular language standard and as 
> such changing Clang's default shouldn't make things any better or worse.

+1

  -Hal

>         Charles Li has been doing a lot of patient work for a long
>         time to get
>         Clang's lit tests to be compatible with C++11. There are only
>         16 tests
>         that still need to be reviewed:
>
>         https://reviews.llvm.org/D20710 <https://reviews.llvm.org/D20710>
>         https://reviews.llvm.org/D21626 <https://reviews.llvm.org/D21626>
>
>         Once those are in, we should be able to update the default.
>
>         Even if it is not time to update the default for everyone, I would
>         *really* LOVE to set the default dialect for the PS4 target.  That
>         would at least make sure there is no future back-sliding with
>         regards
>         to future test changes, because our public PS4-target bots
>         will catch
>         those cases.  But, those last 16 tests need to be fixed up
>         before we
>         can do that.
>
>         Anybody willing to give some LGTM on the tests, we'd be very
>         grateful.
>         And any thoughts about upgrading the default for everyone,
>         rather than
>         just for PS4, would also be welcome.
>
>         Thanks,
>         --paulr
>
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-- 
Hal Finkel
Lead, Compiler Technology and Programming Languages
Leadership Computing Facility
Argonne National Laboratory

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