You forgot .C (yes, uppercase C means C++, lowercase c means C), .c++ (the best one IMO), and .cxx (when your filesystem doesn't accept crosses, you tip them ov

You forgot .C (yes, uppercase C means C++, lowercase c means C), .c++ (the best one IMO), and .cxx (when your filesystem doesn't accept crosses, you tip them over). See https://gcc.gnu.org/onlinedocs/gcc-12.2.0/gcc/Invoking-G_002b_002b.html https://gcc.gnu.org/onlinedocs/gcc-12.2.0/gcc/Invoking-G_002... for the full list.