> It feels like something that should be provided by the OS somehow. The OS is also written in a language and its idiosyncrasies sometimes do show through in s

> It feels like something that should be provided by the OS somehow. The OS is also written in a language and its idiosyncrasies sometimes do show through in system calls. From what you're saying it sounds like the problem is less that Qt is not part of the OS than that the Qt API wasn't designed with interop at all in mind. A well-designed API can live outside of the OS and vice versa.