51 lines
2.1 KiB
C
51 lines
2.1 KiB
C
/* Error constants. Generic version.
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Copyright (C) 1991-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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/* This file defines the errno constants. */
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#ifndef _BITS_ERRNO_H
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#define _BITS_ERRNO_H 1
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#if !defined _ERRNO_H
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# error "Never include <bits/errno.h> directly; use <errno.h> instead."
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#endif
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#error "Generic bits/errno.h included -- port is incomplete."
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/* Authors of new ports of the GNU C Library must override this file
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with their own bits/errno.h in an appropriate subdirectory of
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sysdeps/. Its function is to define all of the error constants
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from C2011 and POSIX.1-2008, with values appropriate to the
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operating system, and any additional OS-specific error constants.
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C2011 requires all error constants to be object-like macros that
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expand to "integer constant expressions with type int, positive
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values, and suitable for use in #if directives". Moreover, all of
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their names must begin with a capital E, followed immediately by
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either another capital letter, or a digit. It is OK to define
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macros that are not error constants, but only in the implementation
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namespace.
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errno.h is sometimes included from assembly language. Therefore,
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when __ASSEMBLER__ is defined, bits/errno.h may only define macros;
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it may not make any other kind of C declaration or definition.
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Also, the error constants should, if at all possible, expand to
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simple decimal or hexadecimal numbers. */
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#endif /* bits/errno.h. */
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