On Fri, 3 Apr 2020 at 13:38, Lapo Falcone <lapofalcone@xxxxxxxxx> wrote: > > Holy mother of God I cannot believe I'm so dumb. The compiler exactly told me the issue, and I even though about it, but I always thought it couldn't be the error and I looked for something more complex. >From my experiments with it the GCC modules branch Just Works. You shouldn't need to mess with module mappers and things like that unless you're doing something quite advanced.