features-time64.h 1.4 KB

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  1. /* Features part to handle 64-bit time_t support.
  2. Copyright (C) 2021-2023 Free Software Foundation, Inc.
  3. This file is part of the GNU C Library.
  4. The GNU C Library is free software; you can redistribute it and/or
  5. modify it under the terms of the GNU Lesser General Public
  6. License as published by the Free Software Foundation; either
  7. version 2.1 of the License, or (at your option) any later version.
  8. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Lesser General Public License for more details.
  12. You should have received a copy of the GNU Lesser General Public
  13. License along with the GNU C Library; if not, see
  14. <https://www.gnu.org/licenses/>. */
  15. /* We need to know the word size in order to check the time size. */
  16. #include <bits/wordsize.h>
  17. #include <bits/timesize.h>
  18. #if defined _TIME_BITS
  19. # if _TIME_BITS == 64
  20. # if ! defined (_FILE_OFFSET_BITS) || _FILE_OFFSET_BITS != 64
  21. # error "_TIME_BITS=64 is allowed only with _FILE_OFFSET_BITS=64"
  22. # elif __TIMESIZE == 32
  23. # define __USE_TIME_BITS64 1
  24. # endif
  25. # elif _TIME_BITS == 32
  26. # if __TIMESIZE > 32
  27. # error "_TIME_BITS=32 is not compatible with __TIMESIZE > 32"
  28. # endif
  29. # else
  30. # error Invalid _TIME_BITS value (can only be 32 or 64-bit)
  31. # endif
  32. #endif