Technical data

Chapter 4

4. System Functions and Subroutines

This chapter describes extensions to Fortran 77 that are related to the IRIX

compiler and operating system.

•“Library Functions” summarizes the Fortran run-time library

functions.

•“Intrinsic Subroutine Extensions” describes the extensions to the

Fortran intrinsic subroutines.

•“Function Extensions” describes the extensions to the Fortran

functions.

Library Functions

The Fortran library functions provide an interface from Fortran programs to

the system in the same way that the C library provides for C programs. The

compiler automatically loads an interface routine when it processes the

associated call.