Maximum length of a line Post: 302751959

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Top Forums Programming Maximum length of a line Post 302751959 by hbar on Saturday 5th of January 2013 04:53:18 AM

01-05-2013

Registered User

Quote:

Originally Posted by Don Cragun

Without knowing what compiler you're using, there is no way to know if there is an option for your FORTRAN compiler to accept non-standard input line formats. (The FORTRAN 66 and 77 languages basically assumed that programs were entered into a system on 80 column punched cards. And, the last 8 columns were reserved for comments.) Most C compilers have no limit other than the fact that C source files are text files and text files have a maximum line length of LINE_MAX bytes including the terminating <newline> character. (You can find the value of LINE_MAX on your system by running the command: getconf LINE_MAX.)

The best way to determine if there is an option on your compiler is to read the man page on your system for your compiler. If you invoke your compiler by executing f77, then the command: man f77 should give you the man page for your compiler.

getconf LINE_MAX gives
2048

Right now I am using Intel fortran compiler (ifort).

hbar

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LEARN ABOUT SUSE

extutils::f77

F77(3)							User Contributed Perl Documentation						    F77(3)

NAME

       ExtUtils::F77 - Simple interface to F77 libs

DESCRIPTION

       This module tries to figure out how to link C programs with Fortran subroutines on your system. Basically one must add a list of Fortran
       runtime libraries. The problem is their location and name varies with each OS/compiler combination!

       This module tries to implement a simple 'rule-of-thumb' database for various flavours of UNIX systems.  A simple self-documenting Perl
       database of knowledge/code for figuring out how to link for various combinations of OS and compiler is embedded in the modules Perl code.
       Please help save the world by sending database entries for your system to karl_pgplot@mac.com

       The library list which the module returns can be explicitly overridden by setting the environment variable F77LIBS, e.g.

	 % setenv F77LIBS "-lfoo -lbar"
	 % perl Makefile.PL
	 ...

SYNOPSIS

	 use ExtUtils::F77;		  # Automatic guess
	 use ExtUtils::F77 qw(sunos);	  # Specify system
	 use ExtUtils::F77 qw(linux g77); # Specify system and compiler
	 $fortranlibs = ExtUtils::F77->runtime;

METHODS

       The following methods are provided:

       o   runtime

	   Returns a list of F77 runtime libraries.

	     $fortranlibs = ExtUtils::F77->runtime;

       o   runtimeok

	   Returns TRUE only if runtime libraries have been found successfully.

       o   trail_

	   Returns true if F77 names have trailing underscores.

       o   compiler

	   Returns command to execute the compiler (e.g. 'f77').

       o   cflags

	   Returns compiler flags.

       o   testcompiler

	   Test to see if compiler actually works.

       More methods  will probably be added in the future.

AUTHOR

       Karl Glazebrook (kgb@aaoepp.aao.GOV.AU).

perl v5.12.1							    2007-04-02								    F77(3)