iand with different kind parameters using new gfortran version

Question

I am currently working with old code, that calls the iand function with integers of different kinds as arguments. Here's a small example of what the code includes:

program test
    integer*1 i
    integer j, k 

    i = 1
    j = 8 

    k = iand(i, j)
    print *, k
end program test

gfortran versions 8 and earlier had as an extension the ability to call iand with integers of different kind (see, for instance, here ), whereas this option was removed in gfortran 9 (see this site ). For instance, with gfortran 7.5.0:

gfortran-7 -o test test.f90 && ./test
       0

But when compiling with gfortran 9.2.0, I get:

gfortran -o test test.f90
...
Error: Arguments of ‘iand’ have different kind type parameters at (1)

Is there an option for the new version of gfortran to let me use this code as is?

Answer 1

No, there isn't. This extension was removed as the semantics weren't well specified, and fixing the code to be standard conforming is simple.

See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81509

In your case, something like

k = iand(int(i, kind(j)), j)

is hopefully what you're after.