5 /* Cause a compile-time error if off_t is smaller than 64 bits */
6 #define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
7 int off_t_is_large
[ (LARGE_OFF_T
% 2147483629 == 721 && LARGE_OFF_T
% 2147483647 == 1) ? 1 : -1 ];
8 return off_t_is_large
[0];