release/src/router/dnscrypt/libltdl/libltdl/lt_system.h

   1 /* lt_system.h -- system portability abstraction layer
   2
   3    Copyright (C) 2004, 2007, 2010 Free Software Foundation, Inc.
   4    Written by Gary V. Vaughan, 2004
   5
   6    NOTE: The canonical source of this file is maintained with the
   7    GNU Libtool package.  Report bugs to bug-libtool@gnu.org.
   8
   9 GNU Libltdl is free software; you can redistribute it and/or
  10 modify it under the terms of the GNU Lesser General Public
  11 License as published by the Free Software Foundation; either
  12 version 2 of the License, or (at your option) any later version.
  13
  14 As a special exception to the GNU Lesser General Public License,
  15 if you distribute this file as part of a program or library that
  16 is built using GNU Libtool, you may include this file under the
  17 same distribution terms that you use for the rest of that program.
  18
  19 GNU Libltdl is distributed in the hope that it will be useful,
  20 but WITHOUT ANY WARRANTY; without even the implied warranty of
  21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22 GNU Lesser General Public License for more details.
  23
  24 You should have received a copy of the GNU Lesser General Public
  25 License along with GNU Libltdl; see the file COPYING.LIB.  If not, a
  26 copy can be downloaded from  http://www.gnu.org/licenses/lgpl.html,
  27 or obtained by writing to the Free Software Foundation, Inc.,
  28 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  29 */
  30
  31 #if !defined(LT_SYSTEM_H)
  32 #define LT_SYSTEM_H 1
  33
  34 #include <stddef.h>
  35 #include <stdlib.h>
  36 #include <sys/types.h>
  37
  38 /* Some systems do not define EXIT_*, even with STDC_HEADERS.  */
  39 #if !defined(EXIT_SUCCESS)
  40 # define EXIT_SUCCESS 0
  41 #endif
  42 #if !defined(EXIT_FAILURE)
  43 # define EXIT_FAILURE 1
  44 #endif
  45
  46 /* Just pick a big number... */
  47 #define LT_FILENAME_MAX 2048
  48
  49
  50 /* Saves on those hard to debug '\0' typos....  */
  51 #define LT_EOS_CHAR     '\0'
  52
  53 /* LTDL_BEGIN_C_DECLS should be used at the beginning of your declarations,
  54    so that C++ compilers don't mangle their names.  Use LTDL_END_C_DECLS at
  55    the end of C declarations. */
  56 #if defined(__cplusplus)
  57 # define LT_BEGIN_C_DECLS       extern "C" {
  58 # define LT_END_C_DECLS         }
  59 #else
  60 # define LT_BEGIN_C_DECLS       /* empty */
  61 # define LT_END_C_DECLS         /* empty */
  62 #endif
  63
  64 /* LT_STMT_START/END are used to create macros which expand to a
  65    a single compound statement in a portable way.  */
  66 #if defined (__GNUC__) && !defined (__STRICT_ANSI__) && !defined (__cplusplus)
  67 #  define LT_STMT_START        (void)(
  68 #  define LT_STMT_END          )
  69 #else
  70 #  if (defined (sun) || defined (__sun__))
  71 #    define LT_STMT_START      if (1)
  72 #    define LT_STMT_END        else (void)0
  73 #  else
  74 #    define LT_STMT_START      do
  75 #    define LT_STMT_END        while (0)
  76 #  endif
  77 #endif
  78
  79 /* Keep this code in sync between libtool.m4, ltmain, lt_system.h, and tests.  */
  80 #if defined(_WIN32) || defined(__CYGWIN__) || defined(_WIN32_WCE)
  81 /* DATA imports from DLLs on WIN32 con't be const, because runtime
  82    relocations are performed -- see ld's documentation on pseudo-relocs.  */
  83 # define LT_DLSYM_CONST
  84 #elif defined(__osf__)
  85 /* This system does not cope well with relocations in const data.  */
  86 # define LT_DLSYM_CONST
  87 #else
  88 # define LT_DLSYM_CONST const
  89 #endif
  90
  91 /* Canonicalise Windows and Cygwin recognition macros.
  92    To match the values set by recent Cygwin compilers, make sure that if
  93    __CYGWIN__ is defined (after canonicalisation), __WINDOWS__ is NOT!  */
  94 #if defined(__CYGWIN32__) && !defined(__CYGWIN__)
  95 # define __CYGWIN__ __CYGWIN32__
  96 #endif
  97 #if defined(__CYGWIN__)
  98 # if defined(__WINDOWS__)
  99 #   undef __WINDOWS__
 100 # endif
 101 #elif defined(_WIN32)
 102 # define __WINDOWS__ _WIN32
 103 #elif defined(WIN32)
 104 # define __WINDOWS__ WIN32
 105 #endif
 106 #if defined(__CYGWIN__) && defined(__WINDOWS__)
 107 # undef __WINDOWS__
 108 #endif
 109
 110
 111 /* DLL building support on win32 hosts;  mostly to workaround their
 112    ridiculous implementation of data symbol exporting. */
 113 #if !defined(LT_SCOPE)
 114 #  if defined(__WINDOWS__) || defined(__CYGWIN__)
 115 #    if defined(DLL_EXPORT)             /* defined by libtool (if required) */
 116 #      define LT_SCOPE  extern __declspec(dllexport)
 117 #    endif
 118 #    if defined(LIBLTDL_DLL_IMPORT)     /* define if linking with this dll */
 119        /* note: cygwin/mingw compilers can rely instead on auto-import */
 120 #      define LT_SCOPE  extern __declspec(dllimport)
 121 #    endif
 122 #  endif
 123 #  if !defined(LT_SCOPE)                /* static linking or !__WINDOWS__ */
 124 #    define LT_SCOPE    extern
 125 #  endif
 126 #endif
 127
 128 #if defined(__WINDOWS__)
 129 /* LT_DIRSEP_CHAR is accepted *in addition* to '/' as a directory
 130    separator when it is set. */
 131 # define LT_DIRSEP_CHAR         '\\'
 132 # define LT_PATHSEP_CHAR        ';'
 133 #else
 134 # define LT_PATHSEP_CHAR        ':'
 135 #endif
 136
 137 #if defined(_MSC_VER) /* Visual Studio */
 138 #  define R_OK 4
 139 #endif
 140
 141 /* fopen() mode flags for reading a text file */
 142 #undef  LT_READTEXT_MODE
 143 #if defined(__WINDOWS__) || defined(__CYGWIN__)
 144 #  define LT_READTEXT_MODE "rt"
 145 #else
 146 #  define LT_READTEXT_MODE "r"
 147 #endif
 148
 149 /* The extra indirection to the LT__STR and LT__CONC macros is required so
 150    that if the arguments to LT_STR() (or LT_CONC()) are themselves macros,
 151    they will be expanded before being quoted.   */
 152 #ifndef LT_STR
 153 #  define LT__STR(arg)          #arg
 154 #  define LT_STR(arg)           LT__STR(arg)
 155 #endif
 156
 157 #ifndef LT_CONC
 158 #  define LT__CONC(a, b)        a##b
 159 #  define LT_CONC(a, b)         LT__CONC(a, b)
 160 #endif
 161 #ifndef LT_CONC3
 162 #  define LT__CONC3(a, b, c)    a##b##c
 163 #  define LT_CONC3(a, b, c)     LT__CONC3(a, b, c)
 164 #endif
 165
 166 #endif /*!defined(LT_SYSTEM_H)*/