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1fb05e3d | 1 | /* Copyright (C) 1991, 92, 93, 94, 95, 96, 97 Free Software Foundation, Inc. |
ba1ffaa1 | 2 | This file is part of the GNU C Library. |
28f540f4 | 3 | |
ba1ffaa1 UD |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Library General Public License as | |
6 | published by the Free Software Foundation; either version 2 of the | |
7 | License, or (at your option) any later version. | |
28f540f4 | 8 | |
ba1ffaa1 UD |
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 | Library General Public License for more details. | |
28f540f4 | 13 | |
ba1ffaa1 UD |
14 | You should have received a copy of the GNU Library General Public |
15 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
16 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
17 | Boston, MA 02111-1307, USA. */ | |
28f540f4 RM |
18 | |
19 | /* | |
d1646309 | 20 | * ISO C99 Standard: 7.5 Errors <errno.h> |
28f540f4 RM |
21 | */ |
22 | ||
23 | #ifndef _ERRNO_H | |
24 | ||
c2216480 RM |
25 | /* The includer defined __need_Emath if he wants only the definitions |
26 | of EDOM and ERANGE, and not everything else. */ | |
27 | #ifndef __need_Emath | |
28f540f4 RM |
28 | #define _ERRNO_H 1 |
29 | #include <features.h> | |
c2216480 | 30 | #endif |
28f540f4 RM |
31 | |
32 | __BEGIN_DECLS | |
33 | ||
c2216480 RM |
34 | /* Get the error number constants from the system-specific file. |
35 | This file will test __need_Emath and _ERRNO_H. */ | |
5107cf1d | 36 | #include <bits/errno.h> |
c2216480 | 37 | #undef __need_Emath |
28f540f4 | 38 | |
c2216480 | 39 | #ifdef _ERRNO_H |
14d898ae | 40 | |
555f3a39 | 41 | /* Declare the `errno' variable, unless it's defined as a macro by |
5107cf1d UD |
42 | bits/errno.h. This is the case in GNU, where it is a per-thread |
43 | variable. This redeclaration using the macro still works, but it | |
44 | will be a function declaration without a prototype and may trigger | |
45 | a -Wstrict-prototypes warning. */ | |
555f3a39 | 46 | #ifndef errno |
28f540f4 | 47 | extern int errno; |
555f3a39 | 48 | #endif |
28f540f4 RM |
49 | |
50 | #ifdef __USE_GNU | |
392d7920 | 51 | |
28f540f4 RM |
52 | /* The full and simple forms of the name with which the program was |
53 | invoked. These variables are set up automatically at startup based on | |
54 | the value of ARGV[0] (this works only if you use GNU ld). */ | |
55 | extern char *program_invocation_name, *program_invocation_short_name; | |
a1470b6f RM |
56 | #endif /* __USE_GNU */ |
57 | #endif /* _ERRNO_H */ | |
28f540f4 RM |
58 | |
59 | __END_DECLS | |
60 | ||
1fb05e3d UD |
61 | #endif /* _ERRNO_H */ |
62 | ||
5107cf1d UD |
63 | /* The Hurd <bits/errno.h> defines `error_t' as an enumerated type so |
64 | that printing `error_t' values in the debugger shows the names. We | |
1fb05e3d UD |
65 | might need this definition sometimes even if this file was included |
66 | before. */ | |
67 | #if defined __USE_GNU || defined __need_error_t | |
68 | # ifndef __error_t_defined | |
69 | typedef int error_t; | |
70 | # define __error_t_defined 1 | |
71 | # endif | |
72 | # undef __need_error_t | |
73 | #endif |