/* Tell me what the size and structure of struct timeval are on
   ARM, so I can call select(2) from assembly. 

   On amd64 it says:

   16 bytes for struct timeval; tv_sec is at 0 and is of size 8, while tv_usec is at 8 and is of size 8

   On arm-linux-gnueabi (arm32) it says:

   8 bytes for struct timeval; tv_sec is at 0 and is of size 4, while tv_usec is at 4 and is of size 4

*/

#include <sys/select.h>
#include <stddef.h>
#include <stdio.h>

int main()
{
  struct timeval tv;
  printf("%zu bytes for struct timeval; tv_sec is at %zu and is of size %zu, while tv_usec is at %zu and is of size %zu\n",
         sizeof(tv),
         (size_t)offsetof(struct timeval, tv_sec),
         sizeof(tv.tv_sec),
         (size_t)offsetof(struct timeval, tv_usec),
         sizeof(tv.tv_usec));
  return 0;
}