ExtUtils::Mksymlists(3) ExtUtils::Mksymlists(3)
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 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:
NAME This gives the name of the extension (e.g. Tk::Canvas) for which the
linker option file will be produced.
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').
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ExtUtils::Mksymlists(3) ExtUtils::Mksymlists(3)
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.
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.
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@genetics.upenn.edu>
Last revised 14-Feb-1996, for Perl 5.002.
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