[Development] Use of std::function in Qt API

[Thiago Macieira]

Em sexta-feira, 17 de março de 2017, às 03:31:23 PDT, Marc Mutz escreveu:
> provided the same external libraries, and the same toolchain are used to
> build the two Qt releases.

The problem is this line here. People expect to upgrade other libraries. We 
should say that we guarantee our ABI provided that libc and the C++ library 
guarantee it too. We won't expose any other library's types in our ABI.

But please note how the libstdc++ break was both source-compatible and binary-
compatible for the direct users of that library, but caused BC breaks 
downstream.

-- 
Thiago Macieira - thiago.macieira (AT) intel.com
  Software Architect - Intel Open Source Technology Center