Greetings to all: The program we are writing currently makes use of CLK_TCK (the number of processor clocks per second) from ctime. This we believed was fairly safe; it is ANSI afterall. The configuration and make work fine under Cywin, but Redhat Linux chokes during the make, saying CLK_TCK is undefined. We need either a portable alternative, which we have been unable to turn up, or an autoconf macro to define/include it. Does anyone pocess such a macro. ------------ Kind regards X.C. Clarke Lycos recommends Cheapflights for all your travel needs. Go to http://www.cheapflights.co.uk/?source=lycosgen