


ExtUtils::MksymliPerl3Programmers ReferenExtUtils::Mksymlists(3p)


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.





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ExtUtils::MksymliPerl3Programmers ReferenExtUtils::Mksymlists(3p)


       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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