[swift-dev] Switching swift to C++14

[Jordan Rose]

> On Dec 13, 2017, at 14:19, Saleem Abdulrasool <compnerd at compnerd.org> wrote:
> 
>> On Dec 13, 2017, at 1:45 PM, Jordan Rose <jordan_rose at apple.com> wrote:
>> 
>> No one else has commented on this yet today, so I'll put in that I don't have any objections to this and don't foresee any major problems. The one place where we'd need to be careful is with LLDB, which imports Swift headers; if Swift is going to move to C++14, then Swift-LLDB probably has to as well. LLDB folks, what do you think?
>> 
>> The other thing to check is if our minimum Clang or libstdc++ requirements on Linux didn't support C++14. It looks like our README is vague on that, but LLDB already suggests a minimum requirement of Clang 3.5, which is new enough. I suspect we're okay here.
> 
> The current Ubuntu LTS (16.04) has clang 4 which supports C++14.  libstdc++ claims C++14 compliance in the 4.9 release.  That is available in Xenial (16.04) as well.  So, I believe that the dependency issue should not be a problem.

We're talking minimal requirements, not current versions. Otherwise this becomes a "should we drop support for X" thread, which is a different proposition.

Jordan