F77

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 AT mac DOT com

Note the default on most systems is now to search for a generic ’ GNU ’ compiler which can be g77, gfortran or g95 and then find the appropriate link libraries automatically. (This is the ’Generic’ ’ GNU ’ database entry in the code.)

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:

Returns a list of F77 runtime libraries.

  $fortranlibs = ExtUtils::F77−>runtime;

Returns TRUE only if runtime libraries have been found successfully.

Returns true if F77 names have trailing underscores.

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

Returns compiler flags.

Test to see if compiler actually works.

More methods will probably be added in the future.

AUTHOR

Karl Glazebrook (karlglazebrook AT mac DOT com).