Sorry for getting email trigger happy - I seem to still be confused... If AC_TYPE_UINT8_T is run on a system without uint8_t, a typdef for uint8_t appears in config.h, but it is only created at the end of configure, so how would a subsequent test in configure see the typedef? Cheers, Patrick _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx http://lists.gnu.org/mailman/listinfo/autoconf