Fortran User's Guide

-i2

Set the default integer size to two bytes.

    SPARC:77 x86:77

Set the default size to 2 bytes for integer and logical constants and variables declared without an explicit size. ( INTEGER*n Y still declares Y to be n bytes regardless of the -i2.) This option may degrade performance. It is generally recommended to declare specific variables INTEGER*2 rather than use -i2.