[OvbiousError]

My observation is most people who mix up C and C++ use neither. How could you even automatically migrate when a lot of things you do in C++ are straight up illegal. Not to mention relying on third-party software like Qt.

[pjmlp]

It really hate libraries that call themselves C++ libraries, when they effectively are written in the common subset, with extern "C++" for C++ users.

Technically correct by ISO C++, in practice that isn't the way to write modern code.