Hello, On Tue, Aug 15, 2006 at 02:42:49PM +0100, Keith MARSHALL wrote: > `#if HAVE_NONSUCH_H' would be testing the *value* > of a symbol which isn't defined, so is invalid. > [... It] is a bug wrt current practice > in `config.h', of not defining symbols for missing headers. I would say it is a bug wrt the the recently introduced practice of switching -Wundef on. If preprocessor evaluates an expression, any identifier which is not a macro, evaluates to 0. This is a well defined behaviour which has been used for years. But I agree with you that in the current situation #ifdef seems to be better. Stepan _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx http://lists.gnu.org/mailman/listinfo/autoconf
