ExtUtils::Mksymlists(3pm) Perl Programmers Reference Guide ExtUtils::Mksymlists(3pm)
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 exten-sion). extension).
sion). 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 exten-sion), extension),
sion), 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 FUN-CLIST FUNCLIST
CLIST 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.
perl v5.8.8 2001-09-21 ExtUtils::Mksymlists(3pm)
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