glibc (2.38)
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
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19 /* We need to know the word size in order to check the time size. */
20 #include <bits/wordsize.h>
21 #include <bits/timesize.h>
22
23 #if defined _TIME_BITS
24 # if _TIME_BITS == 64
25 # if ! defined (_FILE_OFFSET_BITS) || _FILE_OFFSET_BITS != 64
26 # error "_TIME_BITS=64 is allowed only with _FILE_OFFSET_BITS=64"
27 # elif __TIMESIZE == 32
28 # define __USE_TIME_BITS64 1
29 # endif
30 # elif _TIME_BITS == 32
31 # if __TIMESIZE > 32
32 # error "_TIME_BITS=32 is not compatible with __TIMESIZE > 32"
33 # endif
34 # else
35 # error Invalid _TIME_BITS value (can only be 32 or 64-bit)
36 # endif
37 #endif
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