Perl in a Nutshell, 2nd Edition

Using DynaLoader

Use DynaLoader like this:

package Module;
require DynaLoader;
@ISA = qw(... DynaLoader ...);

bootstrap Module;

The bootstrap method calls your module’s bootstrap routine directly if the module is statically linked into Perl. Otherwise, the module inherits the bootstrap method from DynaLoader, which loads in your module and calls its bootstrap method.