xref: /netbsd-src/external/bsd/elftoolchain/dist/libelf/_libelf_config.h (revision ad49149131b7552cf1c4fc41370cc055d9b4a80e)
1 /*	$NetBSD: _libelf_config.h,v 1.7 2024/04/01 18:33:22 riastradh Exp $	*/
2 
3 /*-
4  * Copyright (c) 2008-2011 Joseph Koshy
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  *
28  * Id: _libelf_config.h 3975 2022-04-30 20:10:58Z jkoshy
29  */
30 
31 /*
32  * Downstream projects can replace the following placeholder with a custom
33  * definition of LIBELF_BYTEORDER, if the host's native byte order cannot
34  * be determined using the compilation environment.
35  */
36 /* @LIBELF-DEFINE-HOST-BYTEORDER@ */
37 
38 #if	!defined(LIBELF_BYTEORDER)
39 
40 /*
41  * Use the __BYTE_ORDER__ and __ORDER_{LITTLE|BIG}_ENDIAN__ macros to
42  * determine the host's byte order.  These macros are predefined by the
43  * GNU and CLANG C compilers.
44  */
45 #if defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__)
46 
47 #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
48 #define	LIBELF_BYTEORDER	ELFDATA2LSB
49 #else
50 #define	LIBELF_BYTEORDER	ELFDATA2MSB
51 #endif
52 
53 #else
54 
55 #error unknown host byte order
56 
57 #endif	/* defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) */
58 #endif	/* !defined(LIBELF_BYTEORDER) */
59