boost [math] excessive warnings via [lexical_cast] from [date_time] (and others) for clang 3.4?

From: Mike (mike.dev_at_[hidden])
Date: 2020-03-24 20:20:47

> Gesendet: Dienstag, 24. März 2020 um 20:00 Uhr
> Von: "Peter Dimov via Boost" <boost_at_[hidden]>
>
> degski wrote:
> > On Tue, 24 Mar 2020 at 12:18, Peter Dimov via Boost 
> > <boost_at_[hidden]> wrote:
> > > Mike wrote:
> > >
> > > > As degski mentioned, I doubt clang 3.4 was a particularly popular 
> > > > compiler to begin with, so the answer is probably no.
> > >
> > > Clang 3.4 was the default Clang on Ubuntu Trusty.
> >
> > And then there was Xenial and there after Bionic, and judging from the 
> > past release dates soon a new LTS release. In the meanwhile IBM acquired 
> > RedHat (and Fedora and CentOS) ...
> 
> Sure, I'm not saying it's relevant. But if you consider g++ 4.8 popular 
> because it was default on Trusty, you can't consider Clang 3.4 not-popular 
> because it was, too. 
> 

But clang isn't and wasn't the default compiler on ubuntu.
Also, IIRC, when we used clang at all back then, we directly
installed 3.5 anyway and generally, clang was much less popular back then
and mostly used for experimental stuff.