y2038: Add support for 64 bit time on legacy ABIs

A new build flag, _TIME_BITS, enables the usage of the newer 64 bit
time symbols for legacy ABI (where 32 bit time_t is default).  The 64
bit time support is only enabled if LFS (_FILE_OFFSET_BITS=64) is
also used.

Different than LFS support, the y2038 symbols are added only for the
required ABIs (armhf, csky, hppa, i386, m68k, microblaze, mips32,
nios2, powerpc32, sparc32, s390-32, and sh).  The ABIs with 64 bit
time support are unchanged, both for symbol and types redirection.

On Linux apropoer 64 bit time support requires a minimum of kernel
version v5.1.  Otherwise, the 32 bit fallbacks are used and might
results in error with overflow return code (EOVERFLOW).

The i686-gnu does not yet support 64 bit time, and trying to build
it using -D_TIME_BITS=64 results in an error.

This patch also converts following implemetations to support 64 bit
time:

  * libc:
    - adjtimex
    - adjtime
    - clock_adjtime
    - clock_getres
    - clock_gettime
    - clock_nanosleep_time
    - clock_settime
    - ctime
    - ctime_r
    - difftime
    - futimens
    - futimes
    - futimesat
    - getitimer
    - getrusage
    - gettimeofday
    - gmtime
    - gmtime
    - lutimes
    - mktime
    - msgctl
    - nanosleep
    - ntp_gettime
    - ntp_gettimex
    - ppoll
    - pselect
    - recvmmsg
    - sched_rr_get_interval
    - select
    - semctl
    - semtimedop
    - setitimer
    - settimeofday
    - shmctl
    - sigtimedwait
    - time
    - timegm
    - timerfd_gettime
    - timerfd_settime
    - timespec_get
    - utime
    - utimensat
    - utimes
    - wait3
    - wait4

  * libpthread:
    - mtx_timedlock
    - pthread_clockjoin_np
    - pthread_cond_clockwait
    - pthread_cond_timedwait
    - pthread_mutex_clocklock
    - pthread_mutex_timedlock
    - pthread_rwlock_clockrdlock
    - pthread_rwlock_clockwrlock
    - pthread_rwlock_timedrdlock
    - pthread_rwlock_timedwrlock
    - pthread_timedjoin_np
    - sem_clockwait
    - sem_timedwait

  * librt:
    - aio_suspend_time
    - mq_timedreceive_time
    - mq_timedsend_time
    - timer_gettime
    - timer_settime

  * libanl:
    - gai_suspend

1 files changed, 22 insertions, 0 deletions

diff --git a/sysdeps/unix/sysv/linux/sys/timerfd.h b/sysdeps/unix/sysv/linux/sys/timerfd.h
index 4ad64c2259..790b9d5be6 100644
--- a/sysdeps/unix/sysv/linux/sys/timerfd.h
+++ b/sysdeps/unix/sysv/linux/sys/timerfd.h
@@ -47,9 +47,31 @@ extern int timerfd_settime (int __ufd, int __flags,
 			    const struct itimerspec *__utmr,
 			    struct itimerspec *__otmr) __THROW;
 
+#ifdef __USE_TIME_BITS64
+# if defined(__REDIRECT_NTH)
+extern int __REDIRECT_NTH (timerfd_settime,
+                           (int __ufd, int __flags,
+                            const struct itimerspec *__restrict __value,
+                            struct itimerspec *__restrict __ovalue),
+                           __timerfd_settime64);
+# else
+# define timerfd_settime __timerfd_settime64
+# endif
+#endif
+
 /* Return the next expiration time of UFD.  */
 extern int timerfd_gettime (int __ufd, struct itimerspec *__otmr) __THROW;
 
+#ifdef __USE_TIME_BITS64
+# if defined(__REDIRECT_NTH)
+extern int __REDIRECT_NTH (timerfd_gettime, (int __ufd,
+                                             struct itimerspec *__otmr),
+                           __timerfd_gettime64);
+# else
+# define timerfd_gettime __timerfd_gettime64
+# endif
+#endif
+
 __END_DECLS
 
 #endif /* sys/timerfd.h */