That ensures all the relevant perl libraries, and their associated DLLs, are detected by Module::ScanDeps.

However it does not tell PAR::Packer which external DLLs to load. External tools like objdump, otool and ldd are needed to find those, and are what App::PP::Autolink uses, depending on the OS.

Use of the argument to trigger extra module loads is useful. I do the same thing with an environment variable.