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ExtUtils::Mksymlists(3pm)	 Perl Programmers Reference Guide	ExtUtils::Mksymlists(3pm)

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

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

       "ExtUtils::Mksymlists" produces files used by the linker under some OSs during the cre-
       ation 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::Mksym-
       lists".	It takes one argument, a list of key-value pairs, in which the following keys are

	   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.

	   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 suit-
	   ors) ] }".  The function names should be identical to those in the XSUB code; "Mksym-
	   lists" 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.

	   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.

	   This key can be used to specify the name of the linker option file (minus the OS-spe-
	   cific 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 "Can-

	   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 => [] } });

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

	   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.

       Charles Bailey <bailey@newman.upenn.edu>

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

perl v5.8.0				    2002-06-01			ExtUtils::Mksymlists(3pm)
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