diff options
Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 63 |
1 files changed, 38 insertions, 25 deletions
@@ -21,19 +21,6 @@ Major new features: 18661-1:2014 and TS 18661-3:2015 as amended by the resolution of Clarification Request 13 to TS 18661-3. -* The gettimeofday function will no longer report information about a - system-wide time zone, expect for aarch64, powerpc, and x86 on Linux - which still uses the vDSO symbol (when available). - - This 4.2-BSD-era feature has been deprecated for many years, as it cannot - handle the full complexity of the world's timezones, but hitherto we have - supported it on a best-effort basis. Changes required to support 64-bit - time_t on 32-bit architectures have made this no longer practical. - - As of this release, callers of gettimeofday with a non-null 'tzp' argument - will always receive a 'struct timezone' whose tz_minuteswest and - tz_dsttime fields are zero. - * The function pthread_clockjoin_np has been added, enabling join with a terminated thread with a specific clock. It allows waiting against CLOCK_MONOTONIC and CLOCK_REALTIME. This function is a GNU extension. @@ -59,8 +46,34 @@ Deprecated and removed features, and other changes affecting compatibility: floating-point arguments directly will continue to work. * The obsolete function stime is no longer available to newly linked - binaries and it has been removed from <time.h> header. This function - has been deprecated in favor of clock_settime. + binaries, and its declaration has been removed from <time.h>. + Programs that set the system time should use clock_settime instead. + +* We plan to remove the obsolete function ftime, and the header <sys/timeb.h>, + in a future version of glibc. In this release, the header still exists + but calling ftime will cause a compiler warning. All programs should use + gettimeofday or clock_gettime instead. + +* The gettimeofday function no longer reports information about a + system-wide time zone. This 4.2-BSD-era feature has been deprecated for + many years, as it cannot handle the full complexity of the world's + timezones, but hitherto we have supported it on a best-effort basis. + Changes required to support 64-bit time_t on 32-bit architectures have + made this no longer practical. + + As of this release, callers of gettimeofday with a non-null 'tzp' argument + should expect to receive a 'struct timezone' whose tz_minuteswest and + tz_dsttime fields are zero. (For efficiency reasons, this does not always + happen on a few Linux-based ports. This will be corrected in a future + release.) + + All callers should supply a null pointer for the 'tzp' argument to + gettimeofday. For accurate information about the time zone associated + with the current time, use the localtime function. + + gettimeofday itself is obsolescent according to POSIX. We have no plans + to remove access to this function, but portable programs should consider + using clock_gettime instead. * The settimeofday function can still be used to set a system-wide time zone when the operating system supports it. This is because the Linux @@ -80,18 +93,18 @@ Deprecated and removed features, and other changes affecting compatibility: becomes available, we will change settimeofday to fail with ENOSYS on all platforms when its 'tzp' argument is not a null pointer. - Note that settimeofday itself is obsolescent according to POSIX. - Programs that set the system time should use clock_settime and/or - the adjtime family of functions instead. We may also cease to make - settimeofday available to newly linked binaries after there is a - replacement for Linux's time-zone-like offset API. + settimeofday itself is obsolescent according to POSIX. Programs that set + the system time should use clock_settime and/or the adjtime family of + functions instead. We may cease to make settimeofday available to newly + linked binaries after there is a replacement for Linux's time-zone-like + offset API. -* The obsolete functions ftime has been deprecated and will be removed from - a future version of glibc. Application should use clock_gettime instead. +* SPARC ISA v7 is no longer supported. v8 is still supported, but only if + the optional CAS instruction is implemented (for instance, LEON processors + are still supported, but SuperSPARC processors are not). -* The sparc*-*linux-gnu configurations targeting v7 or order architecture - are no longer supported. For v8 only implementations with native CAS - instruction are still supported (such as LEON). + As the oldest 64-bit SPARC ISA is v9, this only affects 32-bit + configurations. * If a lazy binding failure happens during dlopen, during the execution of an ELF constructor, the process is now terminated. Previously, the |