Intel(R) Fortran Compiler for Linux* Systems User's Guide Volume I ...

Intel® Fortran Compiler for Linux* Systems User's Guide, Volume I: Building
Applications
• Add the statement USE IFPORT to your program. This statement includes
the portability library libifport.a.
• Call portability routines using the correct parameters and return value.
libifport.a is passed to the linker by default during linking. To prevent
libifport.a from being passed to the linker, specify the -fpscomp nolibs
option.
Using the libifport.a portability library provides interface blocks and
parameter definitions for the routines, as well as compiler verification of calls.
Some routines in this library can be called with different sets of arguments, and
sometimes even as a function instead of a subroutine. In these cases, the
arguments and calling mechanism determine the meaning of the routine. The
libifport.a portability library contains generic interface blocks that give
procedure definitions for these routines.
Fortran 95/90 contains intrinsic procedures for many of the portability functions.
The portability routines are extensions to the Fortran 95 standard. When writing
new code, use Fortran 95/90 intrinsic procedures whenever possible (for
portability and performance reasons).
Portability Routines
This section describes some of the portability routines and how to use them.
For a complete list of the routines, see the table of Portability Routines in the
Overview chapter of the Intel Fortran Libraries Reference.
Information Retrieval Routines
Information retrieval routines return information about system commands,
command-line arguments, environment variables, and process or user
information.
Group, user, and process ID are INTEGER(4) variables. Login name and host
name are character variables. The functions GETGID and GETUID are provided
for portability, but always return 1.
Process Control Routines
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