But it is dear hacker, it is! (free interpretation of Jethro Tull's "But you can Guru, You can" in the story of the Hare who lost his spectacles)

Please see d_gconvert.U.

Short summary, these units are parsed, selected and ordered according to the requirements of the perl source itself and than remodelled into the script that is called Configure.

If you dare start the journey, read the README to start this early in the perl configuration process.