Detect porting problems to FreeBSD/arm, which has time_t wider than long int. Original problem reported for GNU diff by Xin Li in <http://lists.gnu.org/archive/html/bug-gnu-utils/2007-06/msg00091.html>. * modules/getdate (Depends-on): Add intprops, verify. * lib/getdate.y: Include intprops.h, verify.h. Verify that time_t is an integer type no wider than long int.