1 /* Copyright (C) 1991,92,93,94,95,96,97,2002 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, see
16 <http://www.gnu.org/licenses/>. */
19 * ISO C99 Standard: 7.5 Errors <errno.h>
24 /* The includer defined __need_Emath if he wants only the definitions
25 of EDOM and ERANGE, and not everything else. */
28 # include <features.h>
33 /* Get the error number constants from the system-specific file.
34 This file will test __need_Emath and _ERRNO_H. */
35 #include <bits/errno.h>
40 /* Declare the `errno' variable, unless it's defined as a macro by
41 bits/errno.h. This is the case in GNU, where it is a per-thread
42 variable. This redeclaration using the macro still works, but it
43 will be a function declaration without a prototype and may trigger
44 a -Wstrict-prototypes warning. */
50 extern const char *__progname, *__progname_full;
52 #if defined __USE_GNU && defined __UCLIBC_HAS_PROGRAM_INVOCATION_NAME__
54 /* The full and simple forms of the name with which the program was
55 invoked. These variables are set up automatically at startup based on
56 the value of ARGV[0] (this works only if you use GNU ld). */
57 extern const char *program_invocation_name, *program_invocation_short_name;
58 #endif /* __USE_GNU */
66 # define errno _dl_errno
67 extern int _dl_errno; /* attribute_hidden */
68 #elif defined __UCLIBC_HAS_TLS__
69 # if !defined NOT_IN_libc || defined IS_IN_libpthread
72 # define errno __libc_errno
74 # define errno errno /* For #ifndef errno tests. */
76 extern __thread int errno attribute_tls_model_ie;
81 #define __set_errno(val) (errno = (val))
87 /* The Hurd <bits/errno.h> defines `error_t' as an enumerated type so
88 that printing `error_t' values in the debugger shows the names. We
89 might need this definition sometimes even if this file was included
91 #if defined __USE_GNU || defined __need_error_t
92 # ifndef __error_t_defined
94 # define __error_t_defined 1
96 # undef __need_error_t