I have little bit good news for Delphi:

By adding pp to extension list somewhere in the options it's possible to compile pp files as well.

At first I thought it was syntax highlighting only... but this does not appear to be the case...

It actually does compile ! ;) (Delphi XE)

This probably works for all versions of Delphi is my bet ! ;) :)

So the chances of me actually compiling the RTL from an "external compiler" are increasing ! ;) =D

Bye,
Skybuck.