Not supporting a feature doesn't mean actively preventing you from attempting to use it. It might just have not given the expected result.
> To even raise the question seems to imply that it supports function calls
Yes, but it doesn't imply a stack or support for reentrance. If the language supports only global (pre-allocated) variables like early versions of FORTRAN and BASIC, then there's no allowance for recursion.
> To even raise the question seems to imply that it supports function calls
Yes, but it doesn't imply a stack or support for reentrance. If the language supports only global (pre-allocated) variables like early versions of FORTRAN and BASIC, then there's no allowance for recursion.