compat/os/linux.h

   1 /*
   2  * Copyright (C) 1996-2023 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