[PATCH, libfortran] PR 48587 Newunit allocator

[Jerry DeLisle]

On 10/13/2016 08:16 AM, Janne Blomqvist wrote:
> Currently GFortran newer reuses unit numbers allocated with NEWUNIT=,
> instead having a simple counter that is decremented each time such a
> unit is opened.

I am going to have to study this a bit. After I added the newunit stack, the 
units are reused,  Need to see how this plays with internal units, and 
recursive, and dtio.

Jerry