PGI Fortran - Servidor WWW del Cluster Ladon-Hidra

PrefaceThis manual describes The Portland Group's implementation of the FORTRAN 77, Fortran 90/95and High Performance Fortran (HPF) languages. Collectively, The Portland Group compilers thatimplement these languages are referred to as the PGI Fortran compilers. This manual is part of aset of other documents describing the Fortran language and the compilation tools available fromThe Portland Group. This manual presents the Fortran language statements, intrinsics, andextension directives. The Portland Group’s Fortran compilation system includes a compilationdriver, multiple Fortran compilers, associated runtime support and mathematical libraries, andassociated software development tools for debugging and profiling the performance of Fortranprograms. Depending on the target system, The Portland Group’s Fortran software developmenttools may also include an assembler or a linker. You can use these tools to create, debug, optimizeand profile your Fortran programs. Related Publications lists other manuals in the PGIdocumentation set.Audience DescriptionThis manual is intended for people who are porting or writing Fortran programs using the PGIFortran compilers. To use Fortran you should be aware of the role of Fortran and of source-levelprograms in the software development process and you should have some knowledge of aparticular system or workstation cluster. To use the PGI Fortran compilers, you need to be familiarwith the Fortran language, either FORTRAN77, Fortran 90/95 or HPF, and the basic commandsavailable on your host system.Compatibility and Conformance to StandardsThe PGI Fortran compilers, PGF77, PGF95 and PGHPF, run on a variety of 32-bit and 64-bit x86processor-based host systems. The PGF77 compiler accepts an enhanced version of FORTRAN77 that conforms to the ANSI standard for FORTRAN 77 and includes various extensions fromVAX/VMS Fortran, IBM/VS Fortran, and MIL-STD-1753. The PGF95 compiler accepts asimilarly enhanced version of the ANSI standard for Fortran 90/95. The PGHPF compiler acceptsthe HPF language and is largely, though not strictly, a superset of Fortran 90/95. The PGHPFcompiler conforms to the High Performance Fortran Language Specification Version 1.1,published by the Center for Research on Parallel Computation, at Rice University (with a fewlimitations and modifications, consult the PGHPF Release Notes for details).For further information on the Fortran language, you can also refer to the following:• American National Standard Programming Language FORTRAN, ANSI X3. -1978(1978).Preface 7