Any names in the form -lname are converted into libname. Directories may be specified as -Ldir . Any other names are treated as filenames to be searched for. See DynaLoader.pm for more information. An opaque 'library reference' is returned as a handle for the loaded object.
Returns undef on error.
This is function that does the real work. Don't worry if your platform does not provide a mechanism for this. Most do not need it and hence do not provide it, they just return an empty list. Returns a reference to the installed function. This is the normal entry point for automatic dynamic loading in Perl.