Given the following fortran code:
integer, parameter :: double = kind(1.0d0) integer :: integerTest real(double) :: doubleTest complex(double) :: complexTest integer :: testSize integer :: ierr integerTest = 0 doubleTest = real(0.d0, kind=double) complexTest = cmplx(0.d0, 0.d0, kind=double) call MPI_SIZEOF(integerTest, testSize, ierr) ! ... call MPI_SIZEOF(doubleTest, testSize, ierr) ! ... call MPI_SIZEOF(complexTest, testSize, ierr)
I get the error:
error #6285: There is no matching specific subroutine for this generic subroutine call. [MPI_SIZEOF]
on the line
call MPI_SIZEOF(complexTest, testSize, ierr)
This code compiles and executes with no issue using openmpi. What is the cause of this error? It seems like it's looking for a specific match for the type of complexTest, but the whole point of MPI_SIZEOF is to work generically with nearly any type.