libroot/posix/stdio: Remove unused portions.
[haiku.git] / src / system / libroot / posix / glibc / include / errno.h
blob645a439db7a0c40aba9e21f49d2bc28120cd6d03
1 /* Copyright (C) 1991, 92, 93, 94, 95, 96, 97 Free Software Foundation, Inc.
2 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.
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.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 02111-1307 USA. */
20 * ISO C99 Standard: 7.5 Errors <errno.h>
23 #ifndef _ERRNO_H
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
28 #define _ERRNO_H 1
29 #include <features.h>
30 #endif
32 __BEGIN_DECLS
34 /* Get the error number constants from the system-specific file.
35 This file will test __need_Emath and _ERRNO_H. */
36 #include <bits/errno.h>
37 #undef __need_Emath
39 #ifdef _ERRNO_H
41 /* Declare the `errno' variable, unless it's defined as a macro by
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. */
46 #ifndef errno
47 extern int errno;
48 #endif
50 #ifdef __USE_GNU
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;
56 #endif /* __USE_GNU */
57 #endif /* _ERRNO_H */
59 __END_DECLS
61 #endif /* _ERRNO_H */
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
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