I was working on that, but I have seen some differences with PreOS /sdk/include/ headers :
- japlib.h is in the PreOS package
- there is huflib.h in PreOS pack, but hufflib.h in TIGCC
- some headers are different (hufflib and gray4lib) : in PreOS pack, the export are links to the ziplib and graphlib functions.

Question : what headers should I convert ? (PreOS ones I think, but I don't want to do useless job).