Re: Add c++11 to USE_LANGUAGES

[Sevan Janiyan <venture37%geeklan.co.uk@localhost>]

On 14/04/2017 00:17, Greg Troxel wrote:
> So, we could make c++ require 4.8, and c++11 require 4.8 and add
> --std=c++11, and punt on c++14 for now.
> 
> I am curious what you think of that (plus anyone else with suggestions
> and accompanying rationale as to which of the suboptimal choices we
> should make).
> 
> I am also curious if other packaging systems have useful approaches we
> can learn from.

Pointing grep at the tree, I found

Packages setting GCC_REQD=
(ignoring those below 4.8)
4.8 - 27 - various
4.9 - 3  - net/filezilla, net/libfilezilla, audio/musicpd
5.3 - 1  - games/mame
6.2 - 1  - cross/h8300-elf-gcc


Packages explicitly setting std=
c++14 	- 1 - devel/boost-jam
gnu++14	- 0
c++11 	- ~91 (a couple setting std=c++11 outside of the Makefile)
gnu++11	- 4 - databases/soci, net/zeromq, sysutils/open-vm-tools, www/cppcms

I would prefer to be forward looking & settle on 4.9 instead, then add
the necessary logic to set std to c++11 or 14 depending (4.9 featured
the introduction of c++14 support). However I don't feel strongly about
it, am I right in thinking that the choice of 4.8 is for the benefit of
netbsd-7 users? (4.7 featured the introduction of c++11 support).

Sevan