extern int _weak clock_gettime(clockid_t clk_id, struct timespec *ts);
extern int _weak sync_file_range(int fd, off64_t offset, off64_t nbytes,
unsigned int flags);
extern int _weak clock_gettime(clockid_t clk_id, struct timespec *ts);
extern int _weak sync_file_range(int fd, off64_t offset, off64_t nbytes,
unsigned int flags);