I'd prefer to address the function under its fully qualified name, my $foo = Some::Module::function(@bar); That will work from anywhere and does not clutter up other namespaces.

If you still want to do that, subclass Exporter in Some::Module and place 'function' in @EXPORT to get the function by default, or @EXPORT_OK to get it by the syntax in your example. To make it available everywhere at the same time, import it at top level, into main::.