Tobias, The quad_3.f90 testcase fails on AIX, which does not have quad math enabled.
I do not understand how the following line can be correct. Fortran does not have early exit and the line is evaluated at compile time, so real_kinds(3) is not valid because real_kinds array does not have that many elements. if (size (real_kinds) >= 4 .and. real_kinds(3) == 10 .and. qp == 16) then Thanks, David