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linux.h
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1/*
2 * Copyright (C) 1996-2025 The Squid Software Foundation and contributors
3 *
4 * Squid software is distributed under GPLv2+ license and includes
5 * contributions from numerous individuals and organizations.
6 * Please see the COPYING and CONTRIBUTORS files for details.
7 */
8
9#ifndef SQUID_COMPAT_OS_LINUX_H
10#define SQUID_COMPAT_OS_LINUX_H
11
12#if _SQUID_LINUX_
13
14/****************************************************************************
15 *--------------------------------------------------------------------------*
16 * DO *NOT* MAKE ANY CHANGES below here unless you know what you're doing...*
17 *--------------------------------------------------------------------------*
18 ****************************************************************************/
19
20#if USE_ASYNC_IO
21#define _SQUID_LINUX_THREADS_
22#endif
23
24/*
25 * res_init() is just a macro re-definition of __res_init on Linux (Debian/Ubuntu)
26 */
27#if !defined(HAVE_RES_INIT) && defined(HAVE___RES_INIT) && !defined(res_init)
28#define res_init __res_init
29#define HAVE_RES_INIT HAVE___RES_INIT
30#endif
31
32/*
33 * Netfilter header madness. (see Bug 4323)
34 *
35 * Netfilter have a history of defining their own versions of network protocol
36 * primitives without sufficient protection against the POSIX defines which are
37 * always present in Linux.
38 *
39 * netinet/in.h must be included before any other sys header in order to properly
40 * activate include guards in <linux/libc-compat.h> the kernel maintainers added
41 * to workaround it.
42 */
43#if HAVE_NETINET_IN_H
44#include <netinet/in.h>
45#endif
46
47/*
48 * glob.h is provided by GNU on Linux and contains some unavoidable preprocessor
49 * logic errors in its 64-bit definitions which are hit by non-GCC compilers.
50 *
51 * #if __USE_FILE_OFFSET64 && __GNUC__ < 2
52 * # define glob glob64
53 * #endif
54 * #if !defined __USE_FILE_OFFSET64 || __GNUC__ < 2
55 * extern "C" glob(...);
56 * #endif
57 * extern "C" glob64(...);
58 *
59 * ... and multiple "C" definitions of glob64 refuse to compile.
60 * Because __GNUC__ being undefined equates to 0 and (0 < 2)
61 */
62#if __USE_FILE_OFFSET64 && __GNUC__ < 2
63#if HAVE_GLOB_H
64#undef HAVE_GLOB_H
65#endif
66#if HAVE_GLOB
67#undef HAVE_GLOB
68#endif
69#endif
70
71#endif /* _SQUID_LINUX_ */
72#endif /* SQUID_COMPAT_OS_LINUX_H */
73