> What about the license Thorny. Much of the library and core code uses GPL or LGPL, while saying t= hat they don=92t intend to require that your code be open-source (which is = contradictory, especially in embedded systems.) And each third party library can have additional license requirements. IIR= C, a popular SDFAT library is explicitly and intentionally viral=85 (Hmm. = GPL3, anyway. I can=92t find =93explicitly viral=94 anywhere.) BillW --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .