10. System Dependent Routines Module

The sys module contains all the system dependent routines which are not concerned with input / output operations. Currently this module contains the routines which determine the large and small numbers to be used by the code. It also contains a function which can be used to determine if a real number is close to zero.

In addition the module contains routines which return the time, date and the value of environment variables. This set of routines is truly system dependent and sections have been added which allow the routines to work under

• Digital Fortran on DEC alpha and NT
• SunOS
• Linux using g77
• IRIX and IRIX64
• Salford