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2b778ceb | 1 | /* Copyright (C) 2020-2021 Free Software Foundation, Inc. |
2b09ebee AF |
2 | This file is part of the GNU C Library. |
3 | ||
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 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
15 | License along with the GNU C Library; if not, see | |
16 | <https://www.gnu.org/licenses/>. */ | |
17 | ||
18 | #ifndef _UNISTD_H | |
19 | # error "Never include this file directly. Use <unistd.h> instead" | |
20 | #endif | |
21 | ||
22 | #include <bits/wordsize.h> | |
23 | ||
24 | /* This header should define the following symbols under the described | |
25 | situations. A value `1' means that the model is always supported, | |
26 | `-1' means it is never supported. Undefined means it cannot be | |
27 | statically decided. | |
28 | ||
29 | _POSIX_V7_ILP32_OFF32 32bit int, long, pointers, and off_t type | |
30 | _POSIX_V7_ILP32_OFFBIG 32bit int, long, and pointers and larger off_t type | |
31 | ||
32 | _POSIX_V7_LP64_OFF32 64bit long and pointers and 32bit off_t type | |
33 | _POSIX_V7_LPBIG_OFFBIG 64bit long and pointers and large off_t type | |
34 | ||
35 | The macros _POSIX_V6_ILP32_OFF32, _POSIX_V6_ILP32_OFFBIG, | |
36 | _POSIX_V6_LP64_OFF32, _POSIX_V6_LPBIG_OFFBIG, _XBS5_ILP32_OFF32, | |
37 | _XBS5_ILP32_OFFBIG, _XBS5_LP64_OFF32, and _XBS5_LPBIG_OFFBIG were | |
38 | used in previous versions of the Unix standard and are available | |
39 | only for compatibility. | |
40 | */ | |
41 | ||
42 | #if __WORDSIZE == 64 | |
43 | ||
44 | /* We can never provide environments with 32-bit wide pointers. */ | |
45 | # define _POSIX_V7_ILP32_OFF32 -1 | |
46 | # define _POSIX_V7_ILP32_OFFBIG -1 | |
47 | # define _POSIX_V6_ILP32_OFF32 -1 | |
48 | # define _POSIX_V6_ILP32_OFFBIG -1 | |
49 | # define _XBS5_ILP32_OFF32 -1 | |
50 | # define _XBS5_ILP32_OFFBIG -1 | |
51 | /* We also have no use (for now) for an environment with bigger pointers | |
52 | and offsets. */ | |
53 | # define _POSIX_V7_LPBIG_OFFBIG -1 | |
54 | # define _POSIX_V6_LPBIG_OFFBIG -1 | |
55 | # define _XBS5_LPBIG_OFFBIG -1 | |
56 | ||
57 | /* By default we have 64-bit wide `long int', pointers and `off_t'. */ | |
58 | # define _POSIX_V7_LP64_OFF64 1 | |
59 | # define _POSIX_V6_LP64_OFF64 1 | |
60 | # define _XBS5_LP64_OFF64 1 | |
61 | ||
62 | #else /* __WORDSIZE == 32 */ | |
63 | ||
64 | /* RISC-V requires 64-bit off_t */ | |
65 | # define _POSIX_V7_ILP32_OFF32 -1 | |
66 | # define _POSIX_V6_ILP32_OFF32 -1 | |
67 | # define _XBS5_ILP32_OFF32 -1 | |
68 | ||
69 | # define _POSIX_V7_ILP32_OFFBIG 1 | |
70 | # define _POSIX_V6_ILP32_OFFBIG 1 | |
71 | # define _XBS5_ILP32_OFFBIG 1 | |
72 | ||
73 | /* We can never provide environments with 64-bit wide pointers. */ | |
74 | # define _POSIX_V7_LP64_OFF64 -1 | |
75 | # define _POSIX_V7_LPBIG_OFFBIG -1 | |
76 | # define _POSIX_V6_LP64_OFF64 -1 | |
77 | # define _POSIX_V6_LPBIG_OFFBIG -1 | |
78 | # define _XBS5_LP64_OFF64 -1 | |
79 | # define _XBS5_LPBIG_OFFBIG -1 | |
80 | ||
81 | #endif /* __WORDSIZE == 32 */ |