#cmakedefine _LARGEFILE_SOURCE

#cmakedefine _LARGE_FILES

#cmakedefine _FILE_OFFSET_BITS @_FILE_OFFSET_BITS@

#include <sys/types.h>

#include <stdio.h>

#include <stdlib.h>

int main(int argc, char **argv)

{

  /* Cause a compile-time error if off_t is smaller than 64 bits,

   * and make sure we have ftello / fseeko.

   */

#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))

  int off_t_is_large[ (LARGE_OFF_T % 2147483629 == 721 && LARGE_OFF_T % 2147483647 == 1) ? 1 : -1 ];

  FILE *fp = fopen(argv[0],"r");

  off_t offset = ftello( fp );

  fseeko( fp, offset, SEEK_CUR );

  fclose(fp);

  return 0;

}