Re: [B2] Propagate CXX requirements to consumers

From: Andrey Semashev (andrey.semashev_at_[hidden])
Date: 2020-05-15 17:26:03

On 2020-05-15 20:00, Alexander Grund via Boost wrote:
> Hello,
> 
> I'm trying to specify that my library uses C++11 (features) and cannot 
> be compiled or used without.
> 
> Using `[ requires cxx11_defaulted_functions]`

I think, you missed a space before ']'.

> as the project 
> "requirements" does work (lib not build), but e.g. the tests are still 
> build and obviously failing.
> 
> Putting the above as "usage-requirements"Â  (just like 
> `<link>shared:<define>BOOST_NOWIDE_DYN_LINK=1`) doesn't have any effect.
> 
> What is the proper way to do this?

In general, requirements field designates what is required to build your 
library (or executable). usage-requirements designates requirements 
imposed on the users of your library (provided that they use 
Boost.Build). I'm not sure if the requires rule works in 
usage-requirements though, I've never used it.