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NAME

     ExtUtils::Mksymlists - write linker options files for
     dynamic extension



SYNOPSIS
         use ExtUtils::Mksymlists;
         Mksymlists({ NAME     => $name ,
                      DL_VARS  => [ $var1, $var2, $var3 ],
                      DL_FUNCS => { $pkg1 => [ $func1, $func2 ],
                                    $pkg2 => [ $func3 ] });




DESCRIPTION
     ExtUtils::Mksymlists produces files used by the linker under
     some OSs during the creation of shared libraries for dynamic
     extensions.  It is normally called from a MakeMaker-
     generated Makefile when the extension is built.  The linker
     option file is generated by calling the function Mksymlists,
     which is exported by default from ExtUtils::Mksymlists.  It
     takes one argument, a list of key-value pairs, in which the
     following keys are recognized:

     DLBASE
          This item specifies the name by which the linker knows
          the extension, which may be different from the name of
          the extension itself (for instance, some linkers add an
          '_' to the name of the extension).  If it is not
          specified, it is derived from the NAME attribute.  It
          is presently used only by OS2 and Win32.

     DL_FUNCS
          This is identical to the DL_FUNCS attribute available
          via MakeMaker, from which it is usually taken.  Its
          value is a reference to an associative array, in which
          each key is the name of a package, and each value is an
          a reference to an array of function names which should
          be exported by the extension.  For instance, one might
          say DL_FUNCS => { Homer::Iliad => [ qw(trojans greeks)
          ], Homer::Odyssey => [ qw(travellers family suitors) ]
          }.  The function names should be identical to those in
          the XSUB code; Mksymlists will alter the names written
          to the linker option file to match the changes made by
          xsubpp.  In addition, if none of the functions in a
          list begin with the string boot_, Mksymlists will add a
          bootstrap function for that package, just as xsubpp
          does.  (If a boot_<pkg> function is present in the
          list, it is passed through unchanged.)  If DL_FUNCS is
          not specified, it defaults to the bootstrap function
          for the extension specified in NAME.

     DL_VARS
          This is identical to the DL_VARS attribute available
          via MakeMaker, and, like DL_FUNCS, it is usually
          specified via MakeMaker.  Its value is a reference to
          an array of variable names which should be exported by
          the extension.

     FILE This key can be used to specify the name of the linker
          option file (minus the OS-specific extension), if for
          some reason you do not want to use the default value,
          which is the last word of the NAME attribute (e.g. for
          Tk::Canvas, FILE defaults to Canvas).

     FUNCLIST
          This provides an alternate means to specify function
          names to be exported from the extension.  Its value is
          a reference to an array of function names to be
          exported by the extension.  These names are passed
          through unaltered to the linker options file.
          Specifying a value for the FUNCLIST attribute
          suppresses automatic generation of the bootstrap
          function for the package. To still create the bootstrap
          name you have to specify the package name in the
          DL_FUNCS hash:

              Mksymlists({ NAME     => $name ,
                           FUNCLIST => [ $func1, $func2 ],
                           DL_FUNCS => { $pkg => [] } });


     IMPORTS
          This attribute is used to specify names to be imported
          into the extension. It is currently only used by OS/2
          and Win32.

     NAME This gives the name of the extension (e.g. Tk::Canvas)
          for which the linker option file will be produced.

     When calling Mksymlists, one should always specify the NAME
     attribute.  In most cases, this is all that's necessary.  In
     the case of unusual extensions, however, the other
     attributes can be used to provide additional information to
     the linker.



AUTHOR
     Charles Bailey <bailey@newman.upenn.edu>



REVISION
     Last revised 14-Feb-1996, for Perl 5.002.









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Created 1996-2024 by Maxim Chirkov

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