No, that’s not true.
It’s using GCC which, like the VS6 compiler, can do both ‘C’ and C++.
It should be automatically assuming that .c files are to be compiled as ANSI ‘C’
This is a known bug: Dependencies not generated properly
Doing a ‘Clean’ will rebuild using the modified files (be sure that the changes have been saved!)
No, that has never been the case!