1F77(3)                User Contributed Perl Documentation               F77(3)
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NAME

6       ExtUtils::F77 - Simple interface to F77 libs
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DESCRIPTION

9       This module tries to figure out how to link C programs with Fortran
10       subroutines on your system. Basically one must add a list of Fortran
11       runtime libraries. The problem is their location and name varies with
12       each OS/compiler combination! It was originally developed to make
13       building and installation of the PGPLOT module easier, which links to
14       the pgplot Fortran graphics library. It is now used by a numnber of
15       perl modules.
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17       This module tries to implement a simple 'rule-of-thumb' database for
18       various flavours of UNIX systems.  A simple self-documenting Perl
19       database of knowledge/code for figuring out how to link for various
20       combinations of OS and compiler is embedded in the modules Perl code.
21       Please help save the world by submitted patches for new database
22       entries for your system at <https://github.com/PDLPorters/extutils-f77>
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24       Note the default on most systems is now to search for a generic 'GNU'
25       compiler which can be gfortran, g77, g95 or fort77 (in that order based
26       on usage) and then find the appropriate link libraries automatically.
27       (This is the 'Generic' 'GNU' database entry in the code.)
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29       The library list which the module returns can be explicitly overridden
30       by setting the environment variable F77LIBS, e.g.
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32         % setenv F77LIBS "-lfoo -lbar"
33         % perl -MExtUtils::F77 -e 'print ExtUtils::F77->compiler, "\n"'
34         ...
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SYNOPSIS

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

43       The following are all class methods.
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45   runtime
46       Returns a list of F77 runtime libraries.
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48         $fortranlibs = ExtUtils::F77->runtime;
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50   runtimeok
51       Returns TRUE only if runtime libraries have been found successfully.
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53   trail_
54       Returns true if F77 names have trailing underscores.
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56   compiler
57       Returns command to execute the compiler (e.g. 'f77').
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59   cflags
60       Returns compiler flags.
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62   testcompiler
63       Test to see if compiler actually works.
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DEBUGGING

66       To debug this module, and/or get more information about its workings,
67       set $ExtUtils::F77::DEBUG to a true value. If set, it will "warn"
68       various information about its operations.
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70       As of version 1.22, this module will no longer print or warn if it is
71       working normally.
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SEE ALSO

74       PDL (PDL::Minuit and PDL::Slatec), PGPLOT
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AUTHOR

77       Karl Glazebrook, with many other contributions (see git repository at
78       https://github.com/PDLPorters/extutils-f77)
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82perl v5.30.1                      2020-01-30                            F77(3)
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