There have been a variety of Lahey compilers over the years, just as there has been evolution among Intel compilers. Intel 32-bit compiler, before version 11.0, defaulted to "IA32" x87 code (no SSE, double precision evaluation of expressions), as did the most recent Lahey 32-bit Windows compilers which I've seen. Read your documentation; don't ask us to guess what you have in mind.
