I have a (GNU) Makefile that does some checks. If a check fails, I want to report that to the user. Is there a way to do that? The best I can find so far is something ugly like ifndef CHIP_VALID include no_valid_CHIP_defined_in_your_Makefile endif Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: www.voti.nl consultancy, development, PICmicro products docent Hogeschool van Utrecht: www.voti.nl/hvu -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist