Use ICOPY and IOTA to avoid stack overflow for larger models - #58
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On Windows in particular the
M = (/ (i,i=1,n) /)assignment easily gives stack overflow whennis large. Therefore replacing with call to new Fortran-77 subroutineIOTA, which works much likexCOPYof BLAS with loop unrolling for efficiency. Also removing internal functionfind_locwhich now is an intrinsic function (since gcc 9).