[Bug c++/90339] New: Change default c++ dialect to -std=gnu++17 in gcc 10 ?

[romain.geissler at amadeus dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90339

            Bug ID: 90339
           Summary: Change default c++ dialect to -std=gnu++17 in gcc 10 ?
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: romain.geissler at amadeus dot com
  Target Milestone: ---

Hi,

In today's release announcement
https://gcc.gnu.org/ml/gcc/2019-05/msg00024.html C++17 is now marked as no
longer experimental in gcc 9. Support has matured for a few years. Do you think
it would make sense to change in gcc 10 the default dialect to -std=gnu++17 so
that distro packages slowly adapt their code to be C++17 compatible ? For
example we hit a few cases last year where some components were typedef'ing a
type named "byte" which resulted in ambiguity when using -std=gnu++17 defining
std::byte.

Cheers,
Romain