XL Fortran Enterprise Edition for AIX : User's Guide - IBM

Overview of XL Fortran Features
This section discusses the features of the XL Fortran compiler, language, and
development environment at a high level. It is intended for people who are
evaluating XL Fortran and for new users who want to find out more about the
product.
Hardware and Operating-System Support
Language Support
The XL Fortran Enterprise Edition Version 9.1 compiler is supported on the Version
5.1, or higher, AIX operating system. See the XL Fortran Enterprise Edition for AIX
Installation Guide and README file for a list of requirements.
The compiler, its generated object programs, and run-time library will run on all
RISC System/6000 ® (RS/6000 ® ) or pSeries ® systems with the required software,
disk space, and virtual storage.
The POWER3, POWER4, or POWER5 processor is a type of PowerPC. In this
document, any statement or reference to the PowerPC also applies to the POWER3,
POWER4, or POWER5 processor.
To take maximum advantage of different hardware configurations, the compiler
provides a number of options for performance tuning based on the configuration
of the machine used for executing an application.
The XL Fortran language consists of the following:
v
v
The full American National Standard Fortran 90 language (referred to as Fortran
90 or F90), defined in the documents American National Standard Programming
Language Fortran 90, ANSI X3.198-1992 and Information technology - Programming
languages - Fortran, ISO/IEC 1539-1:1991(E). This language has a superset of the
features found in the FORTRAN 77 standard. It adds many more features that
are intended to shift more of the tasks of error checking, array processing,
memory allocation, and so on from the programmer to the compiler.
The full ISO Fortran 95 language standard (referred to as Fortran 95 or F95),
defined in the document Information technology - Programming languages - Fortran
- Part 1: Base language, ISO/IEC 1539-1:1997.
v Extensions to the Fortran 95 standard:
– Industry extensions that are found in Fortran products from various compiler
vendors
– Extensions specified in SAA Fortran
In the XL Fortran Enterprise Edition for AIX Language Reference, extensions to the
Fortran 95 language are marked as described in the Typographical Conventions topic.
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