[PATCH v4 0/2] Y2038 support batch 1 - __time64_t and __tz_convert

["Albert ARIBAUD (3ADEV)" <albert dot aribaud at 3adev dot fr>]

This is the first batch of Y2038 support patches.

The first patch introduces __TIMESIZE (which is the bit size of time_t
at glibc build time, and equals __WORDSIZE except for x32 where __WORDSIZE
is 32 but __TIMESIZE is 64) and __time64_t, the 64-bit counterpart of time_t,
to be used in 64-bit-time implementations of public APIs related to time.
Note that __time64_t replaces internal_time_t previously introduced.

The second patch makes __tz_convert compatible with 64-bit time. This
implies creating 64-bit-time versions of its callers and turning their
original versions into wrappers if they were 32-bit-time.

These patches are functionally tested as part of the whole Y2038 patch
series using the ad hoc framework at https://github.com/3adev/y2038 which
runs tests using times below, at and beyond the Y2038 limit.

These patches were also run through build-many-glibcs.py to ensure that
existing glibc configurations are not broken. The minimal configuration
set is x86_64-linux-gnu, aarch64-linux-gnu, powerpc-linux-gnu, and
arm-linux-gnueabi.

Albert ARIBAUD (3ADEV) (2):
  Y2038: Add 64-bit time for all architectures
  Y2038: make __tz_convert compatible with 64-bit-time

 bits/timesize.h                     | 23 ++++++++++++
 bits/timesizes.h                    | 37 ++++++++++++++++++++
 include/time.h                      | 54 +++++++++++++++++++++++------
 posix/bits/types.h                  |  8 +++++
 stdlib/Makefile                     |  2 +-
 sysdeps/x86_64/x32/bits/timesize.h  | 21 +++++++++++
 sysdeps/x86_64/x32/bits/timesizes.h | 32 +++++++++++++++++
 time/ctime.c                        | 18 ++++++++--
 time/ctime_r.c                      | 20 +++++++++--
 time/gmtime.c                       | 40 ++++++++++++++++++---
 time/localtime.c                    | 37 +++++++++++++++++---
 time/offtime.c                      | 12 +++----
 time/tzfile.c                       | 32 +++++++----------
 time/tzset.c                        | 30 +++++++---------
 14 files changed, 297 insertions(+), 69 deletions(-)
 create mode 100644 bits/timesize.h
 create mode 100644 bits/timesizes.h
 create mode 100644 sysdeps/x86_64/x32/bits/timesize.h
 create mode 100644 sysdeps/x86_64/x32/bits/timesizes.h

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2.17.1