111 # ifdef __USE_XOPEN2K8
 112     /* Nanosecond resolution timestamps are stored in a format
 113        equivalent to 'struct timespec'.  This is the type used
 114        whenever possible but the Unix namespace rules do not allow the
 115        identifier 'timespec' to appear in the <sys/stat.h> header.
 116        Therefore we have to handle the use of this header in strictly
 117        standard-compliant sources special.  */
 118     struct timespec st_atim;            /* Time of last access.  */
 119     struct timespec st_mtim;            /* Time of last modification.  */
 120     struct timespec st_ctim;            /* Time of last status change.  */
 121 # else
 122     __time_t st_atime;                  /* Time of last access.  */
 123     unsigned long int st_atimensec;     /* Nscecs of last access.  */
 124     __time_t st_mtime;                  /* Time of last modification.  */
 125     unsigned long int st_mtimensec;     /* Nsecs of last modification.  */
 126     __time_t st_ctime;                  /* Time of last status change.  */
 127     unsigned long int st_ctimensec;     /* Nsecs of last status change.  */
 128 # endif

 118     struct timespec st_atim;            /* Time of last access.  */
 119     struct timespec st_mtim;            /* Time of last modification.  */
 120     struct timespec st_ctim;            /* Time of last status change.  */

 118     st_timespec_t st_atim;            /* Time of last access.  */
 119     st_timespec_t st_mtim;            /* Time of last modification.  */
 120     st_timespec_t st_ctim;            /* Time of last status change.  */

in struct stat
#if _XOPEN_SOURCE>=700
        st_timespec_t st_atim;  /* Time of last access  */
        st_timespec_t st_mtim;  /* Time of last data modification */
        st_timespec_t st_ctim;  /* Time of last file status change */
#else
        time_t  st_atime;       /* Time of last access  */
        int     st_atime_n;
        time_t  st_mtime;       /* Time of last data modification */
        int     st_mtime_n;
        time_t  st_ctime;       /* Time of last file status change */
        int     st_ctime_n;
#endif

in struct stat64
#if _XOPEN_SOURCE>=700
        struct timespec64 st_atim;      /* 16: Time of last access */
        struct timespec64 st_mtim;      /* 16: Time of last data mod */
        struct timespec64 st_ctim;      /* 16: Time of last status change */
#else
        time64_t        st_atime;       /* 8: Time of last access */
        int32_t         st_atime_n;     /* 4: nanoseconds */
        int32_t         st_pad1;        /* 4: padding */
        time64_t        st_mtime;       /* 8: Time of last data modification */
        int32_t         st_mtime_n;     /* 4: nanoseconds */
        int32_t         st_pad2;        /* 4: padding */
        time64_t        st_ctime;       /* 8: Time of last file status change */
        int32_t         st_ctime_n;     /* 4: nanoseconds */
        int32_t         st_pad3;        /* 4: padding */
#endif

and the struct timespec and st_timespec
#if _XOPEN_SOURCE>=700
#ifndef _TIMESPEC
#define _TIMESPEC
struct timespec {
        time_t  tv_sec;         /* seconds */
        long    tv_nsec;        /* and nanoseconds */
};
#endif

/* internal timespec to preserve binary compatibility */
typedef struct st_timespec {
        time_t  tv_sec;         /* seconds */
        int     tv_nsec;        /* and nanoseconds */
A
} st_timespec_t;
#endif