Re: PSA: C++11 libraries need to update their libraries.json and CMakeLists.txt

From: Peter Dimov (pdimov_at_[hidden])
Date: 2023-10-02 16:13:05

Zach Laine wrote:
> I'm just curious why these three libraries are needing a change to
> their libraries.json files.  Was it just an oversight that should have
> been done along with a code change, or was there some other reason?

It's not just these three libraries; any library that increases its
minimal requirement should do that. I'm just listing these as
examples.

> Zach
> 
> On Mon, Oct 2, 2023 at 10:54 AM Peter Dimov via Boost
> <boost_at_[hidden]> wrote:
> >
> > Zach Laine wrote:
> > > Could you clarify why this is happening for these libs in particular?
> > > Not a complaint; just curious.
> >
> > Sorry, why what is happening?
> >
> > >
> > > Zach
> > >
> > > On Sun, Oct 1, 2023 at 7:21 AM Peter Dimov via Boost
> > > <boost_at_[hidden]> wrote:
> > > >
> > > > Libraries that now require C++11, such as Atomic, TypeIndex,
> LexicalCast,
> > > > need to update their libraries.json files to now state "cxxstd": 11, and
> > > > to add the C++11 requirement to their CMakeLists.txt files, e.g.
> > > >
> > > > target_compile_features(boost_lexical_cast INTERFACE cxx_std_11)
> > > >
> > > > boostdep --cmake looks at libraries.json and automatically adds the
> > > > above requirement, so for generated CMakeLists.txt files (such as the
> > > > one in lexical_cast), a simple regeneration with e.g.
> > > > `boostdep --cmake lexical_cast` will suffice.
> > > >
> > > > Note that cxx_std_11 requires CMake 3.8, so the
> > > > cmake_minimum_required line may need to be adjusted as well.
> > > >
> > > > (`boostdep --cmake` does that automatically.)
> > > >
> > > >
> > > >
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