Would it be possible to ship the PIPlib code with PPL to avoid having one more library dependence in GCC?
Mmm, PIP/PipLib is in C and the code writing is probably far from the PPL quality standards. I understand your point but putting PIP in the PPL (I mean quickly) would be something very artificial... Someday, someone must be courageous enough to write a new tool based on the PIP algorithm from scratch to allow easy integration in other tools (this will probably happen via Denis Barthou from Versailles). I dreamt a lot about this. However I highly discourage any modification of PIP itself because this is a complex tool, 21 year old, with no bug in the core since _ages_ while highly used. I believe it must be used to test its "son" (even if it is a fork) and not to evolve anymore, except in surface.
Just my 2 cents, I'm NOT the owner of PIP. Paul Feautrier is.
Cédric