Syntax:
The /f77rtl option controls the run-time support that is used when a program is executed. Specifying /f77rtl uses the Compaq Fortran 77 run-time behavior. In the visual development environment, specify Enable F77 Run-Time Compatibility in the Compatibility Compiler Option Category.
Specifying /nof77rtl uses the Visual Fortran (Compaq Fortran) run-time behavior. Unless you specify /f77rtl, /nof77rtl is used.