There are macros F77_type_TYPE
which expand to the C data type that corresponds to the FORTRAN data type of
the macro name, e.g. on a particular computer
F77_INTEGER_TYPE may expand to
These are usually not needed explicitly within user written code, but can be
required when declaring common blocks, casting values from a variable of one
type to one of a different type and when using the sizeof operator.
CNF and F77 Mixed Language Programming -- FORTRAN and C