src/conf_post.h

   1 /* conf_post.h --- configure.ac includes this via AH_BOTTOM
   2
   3 Copyright (C) 1988, 1993-1994, 1999-2002, 2004-2012
   4   Free Software Foundation, Inc.
   5
   6 This file is part of GNU Emacs.
   7
   8 GNU Emacs is free software: you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation, either version 3 of the License, or
  11 (at your option) any later version.
  12
  13 GNU Emacs is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 /* Commentary:
  22
  23    Rather than writing this code directly in AH_BOTTOM, we include it
  24    via this file.  This is so that it does not get processed by
  25    autoheader.  Eg, any undefs here would otherwise be commented out.
  26 */
  27
  28 /* Code: */
  29
  30 /* Include any platform specific configuration file.  */
  31 #ifdef config_opsysfile
  32 # include config_opsysfile
  33 #endif
  34
  35 #ifndef WINDOWSNT
  36 /* On AIX 3 this must be included before any other include file.  */
  37 #include <alloca.h>
  38 #if ! HAVE_ALLOCA
  39 # error "alloca not available on this machine"
  40 #endif
  41 #endif
  42
  43 /* This silences a few compilation warnings on FreeBSD.  */
  44 #ifdef BSD_SYSTEM_AHB
  45 #undef BSD_SYSTEM_AHB
  46 #undef BSD_SYSTEM
  47 #if __FreeBSD__ == 1
  48 #define BSD_SYSTEM 199103
  49 #elif __FreeBSD__ == 2
  50 #define BSD_SYSTEM 199306
  51 #elif __FreeBSD__ >= 3
  52 #define BSD_SYSTEM 199506
  53 #endif
  54 #endif
  55
  56 #ifdef DARWIN_OS
  57 #ifdef emacs
  58 #define malloc unexec_malloc
  59 #define realloc unexec_realloc
  60 #define free unexec_free
  61 /* Don't use posix_memalign because it is not compatible with unexmacosx.c.  */
  62 #undef HAVE_POSIX_MEMALIGN
  63 #endif
  64 /* The following solves the problem that Emacs hangs when evaluating
  65    (make-comint "test0" "/nodir/nofile" nil "") when /nodir/nofile
  66    does not exist.  Also, setsid is not allowed in the vfork child's
  67    context as of Darwin 9/Mac OS X 10.5.  */
  68 #undef HAVE_WORKING_VFORK
  69 #define vfork fork
  70 #endif  /* DARWIN_OS */
  71
  72 /* We have to go this route, rather than the old hpux9 approach of
  73    renaming the functions via macros.  The system's stdlib.h has fully
  74    prototyped declarations, which yields a conflicting definition of
  75    srand48; it tries to redeclare what was once srandom to be srand48.
  76    So we go with HAVE_LRAND48 being defined.  */
  77 #ifdef HPUX
  78 #undef srandom
  79 #undef random
  80 /* We try to avoid checking for random and rint on hpux in
  81    configure.ac, but some other configure test might check for them as
  82    a dependency, so to be safe we also undefine them here.
  83  */
  84 #undef HAVE_RANDOM
  85 #undef HAVE_RINT
  86 #endif  /* HPUX */
  87
  88 #ifdef IRIX6_5
  89 #ifdef emacs
  90 char *_getpty();
  91 #endif
  92
  93 #endif /* IRIX6_5 */
  94
  95 #ifdef MSDOS
  96 #ifndef __DJGPP__
  97 You lose; /* Emacs for DOS must be compiled with DJGPP */
  98 #endif
  99 #define _NAIVE_DOS_REGS
 100
 101 /* Start of gnulib-related stuff  */
 102
 103 /* lib/ftoastr.c wants strtold, but DJGPP only has _strtold.  DJGPP >
 104    2.03 has it, but it also has _strtold as a stub that jumps to
 105    strtold, so use _strtold in all versions.  */
 106 #define strtold _strtold
 107
 108 #if __DJGPP__ > 2 || __DJGPP_MINOR__ > 3
 109 # define HAVE_LSTAT 1
 110 #else
 111 # define lstat stat
 112 #endif
 113 /* The "portable" definition of _GL_INLINE on config.h does not work
 114    with DJGPP GCC 3.4.4: it causes unresolved externals in sysdep.c,
 115    although lib/execinfo.h is included and the inline functions there
 116    are visible.  */
 117 #if __GNUC__ < 4
 118 # define _GL_EXECINFO_INLINE inline
 119 #endif
 120 /* End of gnulib-related stuff.  */
 121
 122 #define emacs_raise(sig) msdos_fatal_signal (sig)
 123
 124 /* Define one of these for easier conditionals.  */
 125 #ifdef HAVE_X_WINDOWS
 126 /* We need a little extra space, see ../../lisp/loadup.el and the
 127    commentary below, in the non-X branch.  The 140KB number was
 128    measured on GNU/Linux and on MS-Windows.  */
 129 #define SYSTEM_PURESIZE_EXTRA (-170000+140000)
 130 #else
 131 /* We need a little extra space, see ../../lisp/loadup.el.
 132    As of 20091024, DOS-specific files use up 62KB of pure space.  But
 133    overall, we end up wasting 130KB of pure space, because
 134    BASE_PURESIZE starts at 1.47MB, while we need only 1.3MB (including
 135    non-DOS specific files and load history; the latter is about 55K,
 136    but depends on the depth of the top-level Emacs directory in the
 137    directory tree).  Given the unknown policy of different DPMI
 138    hosts regarding loading of untouched pages, I'm not going to risk
 139    enlarging Emacs footprint by another 100+ KBytes.  */
 140 #define SYSTEM_PURESIZE_EXTRA (-170000+65000)
 141 #endif
 142 #endif  /* MSDOS */
 143
 144 /* Mac OS X / GNUstep need a bit more pure memory.  Of the existing knobs,
 145    SYSTEM_PURESIZE_EXTRA seems like the least likely to cause problems.  */
 146 #ifdef HAVE_NS
 147 #if defined NS_IMPL_GNUSTEP
 148 #  define SYSTEM_PURESIZE_EXTRA 30000
 149 #elif defined DARWIN_OS
 150 #  define SYSTEM_PURESIZE_EXTRA 200000
 151 #endif
 152 #endif
 153
 154 #if defined HAVE_NTGUI && !defined DebPrint
 155 # ifdef EMACSDEBUG
 156 extern void _DebPrint (const char *fmt, ...);
 157 #  define DebPrint(stuff) _DebPrint stuff
 158 # else
 159 #  define DebPrint(stuff)
 160 # endif
 161 #endif
 162
 163 #if defined CYGWIN && defined HAVE_NTGUI
 164 # define NTGUI_UNICODE /* Cygwin runs only on UNICODE-supporting systems */
 165 # define _WIN32_WINNT 0x500 /* Win2k */
 166 #endif
 167
 168 #ifdef emacs /* Don't do this for lib-src.  */
 169 /* Tell regex.c to use a type compatible with Emacs.  */
 170 #define RE_TRANSLATE_TYPE Lisp_Object
 171 #define RE_TRANSLATE(TBL, C) char_table_translate (TBL, C)
 172 #ifdef make_number
 173 /* If make_number is a macro, use it.  */
 174 #define RE_TRANSLATE_P(TBL) (!EQ (TBL, make_number (0)))
 175 #else
 176 /* If make_number is a function, avoid it.  */
 177 #define RE_TRANSLATE_P(TBL) (!(INTEGERP (TBL) && XINT (TBL) == 0))
 178 #endif
 179 #endif
 180
 181 /* Tell gnulib to omit support for openat-related functions having a
 182    first argument other than AT_FDCWD.  */
 183 #define GNULIB_SUPPORT_ONLY_AT_FDCWD
 184
 185 #include <string.h>
 186 #include <stdlib.h>
 187
 188 #if __GNUC__ >= 3  /* On GCC 3.0 we might get a warning.  */
 189 #define NO_INLINE __attribute__((noinline))
 190 #else
 191 #define NO_INLINE
 192 #endif
 193
 194 #if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1))
 195 #define EXTERNALLY_VISIBLE __attribute__((externally_visible))
 196 #else
 197 #define EXTERNALLY_VISIBLE
 198 #endif
 199
 200 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
 201 # define ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
 202 #else
 203 # define ATTRIBUTE_FORMAT(spec) /* empty */
 204 #endif
 205
 206 #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4)
 207 # define ATTRIBUTE_FORMAT_PRINTF(formatstring_parameter, first_argument) \
 208    ATTRIBUTE_FORMAT ((__gnu_printf__, formatstring_parameter, first_argument))
 209 #else
 210 # define ATTRIBUTE_FORMAT_PRINTF(formatstring_parameter, first_argument) \
 211    ATTRIBUTE_FORMAT ((__printf__, formatstring_parameter, first_argument))
 212 #endif
 213
 214 #define ATTRIBUTE_CONST _GL_ATTRIBUTE_CONST
 215
 216 /* Some versions of GNU/Linux define noinline in their headers.  */
 217 #ifdef noinline
 218 #undef noinline
 219 #endif
 220
 221 #define INLINE _GL_INLINE
 222 #define EXTERN_INLINE _GL_EXTERN_INLINE
 223 #define INLINE_HEADER_BEGIN _GL_INLINE_HEADER_BEGIN
 224 #define INLINE_HEADER_END _GL_INLINE_HEADER_END
 225
 226 /* Use this to suppress gcc's `...may be used before initialized' warnings. */
 227 #ifdef lint
 228 /* Use CODE only if lint checking is in effect.  */
 229 # define IF_LINT(Code) Code
 230 /* Assume that the expression COND is true.  This differs in intent
 231    from 'assert', as it is a message from the programmer to the compiler.  */
 232 # define lint_assume(cond) ((cond) ? (void) 0 : abort ())
 233 #else
 234 # define IF_LINT(Code) /* empty */
 235 # define lint_assume(cond) ((void) (0 && (cond)))
 236 #endif
 237
 238 /* conf_post.h ends here */