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 #undef SA_RESTART     /* not the same as defining BROKEN_SA_RESTART */
  94 #endif /* IRIX6_5 */
  95
  96 #ifdef MSDOS
  97 #ifndef __DJGPP__
  98 You lose; /* Emacs for DOS must be compiled with DJGPP */
  99 #endif
 100 #define _NAIVE_DOS_REGS
 101
 102 /* Start of gnulib-related stuff  */
 103
 104 /* lib/ftoastr.c wants strtold, but DJGPP only has _strtold.  DJGPP >
 105    2.03 has it, but it also has _strtold as a stub that jumps to
 106    strtold, so use _strtold in all versions.  */
 107 #define strtold _strtold
 108
 109 #if __DJGPP__ > 2 || __DJGPP_MINOR__ > 3
 110 # define HAVE_LSTAT 1
 111 #else
 112 # define lstat stat
 113 #endif
 114 /* End of gnulib-related stuff.  */
 115
 116 /* Define one of these for easier conditionals.  */
 117 #ifdef HAVE_X_WINDOWS
 118 /* We need a little extra space, see ../../lisp/loadup.el and the
 119    commentary below, in the non-X branch.  The 140KB number was
 120    measured on GNU/Linux and on MS-Windows.  */
 121 #define SYSTEM_PURESIZE_EXTRA (-170000+140000)
 122 #else
 123 /* We need a little extra space, see ../../lisp/loadup.el.
 124    As of 20091024, DOS-specific files use up 62KB of pure space.  But
 125    overall, we end up wasting 130KB of pure space, because
 126    BASE_PURESIZE starts at 1.47MB, while we need only 1.3MB (including
 127    non-DOS specific files and load history; the latter is about 55K,
 128    but depends on the depth of the top-level Emacs directory in the
 129    directory tree).  Given the unknown policy of different DPMI
 130    hosts regarding loading of untouched pages, I'm not going to risk
 131    enlarging Emacs footprint by another 100+ KBytes.  */
 132 #define SYSTEM_PURESIZE_EXTRA (-170000+65000)
 133 #endif
 134 #endif  /* MSDOS */
 135
 136 /* Mac OS X / GNUstep need a bit more pure memory.  Of the existing knobs,
 137    SYSTEM_PURESIZE_EXTRA seems like the least likely to cause problems.  */
 138 #ifdef HAVE_NS
 139 #if defined NS_IMPL_GNUSTEP
 140 #  define SYSTEM_PURESIZE_EXTRA 30000
 141 #elif defined DARWIN_OS
 142 #  define SYSTEM_PURESIZE_EXTRA 200000
 143 #endif
 144 #endif
 145
 146 #ifdef emacs /* Don't do this for lib-src.  */
 147 /* Tell regex.c to use a type compatible with Emacs.  */
 148 #define RE_TRANSLATE_TYPE Lisp_Object
 149 #define RE_TRANSLATE(TBL, C) char_table_translate (TBL, C)
 150 #ifdef make_number
 151 /* If make_number is a macro, use it.  */
 152 #define RE_TRANSLATE_P(TBL) (!EQ (TBL, make_number (0)))
 153 #else
 154 /* If make_number is a function, avoid it.  */
 155 #define RE_TRANSLATE_P(TBL) (!(INTEGERP (TBL) && XINT (TBL) == 0))
 156 #endif
 157 #endif
 158
 159 #include <string.h>
 160 #include <stdlib.h>
 161
 162 #if __GNUC__ >= 3  /* On GCC 3.0 we might get a warning.  */
 163 #define NO_INLINE __attribute__((noinline))
 164 #else
 165 #define NO_INLINE
 166 #endif
 167
 168 #if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1))
 169 #define EXTERNALLY_VISIBLE __attribute__((externally_visible))
 170 #else
 171 #define EXTERNALLY_VISIBLE
 172 #endif
 173
 174 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
 175 # define ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
 176 #else
 177 # define ATTRIBUTE_FORMAT(spec) /* empty */
 178 #endif
 179
 180 #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4)
 181 # define ATTRIBUTE_FORMAT_PRINTF(formatstring_parameter, first_argument) \
 182    ATTRIBUTE_FORMAT ((__gnu_printf__, formatstring_parameter, first_argument))
 183 #else
 184 # define ATTRIBUTE_FORMAT_PRINTF(formatstring_parameter, first_argument) \
 185    ATTRIBUTE_FORMAT ((__printf__, formatstring_parameter, first_argument))
 186 #endif
 187
 188 #define ATTRIBUTE_CONST _GL_ATTRIBUTE_CONST
 189
 190 /* Some versions of GNU/Linux define noinline in their headers.  */
 191 #ifdef noinline
 192 #undef noinline
 193 #endif
 194
 195 #define INLINE _GL_INLINE
 196 #define EXTERN_INLINE _GL_EXTERN_INLINE
 197 #define INLINE_HEADER_BEGIN _GL_INLINE_HEADER_BEGIN
 198 #define INLINE_HEADER_END _GL_INLINE_HEADER_END
 199
 200 /* Use this to suppress gcc's `...may be used before initialized' warnings. */
 201 #ifdef lint
 202 /* Use CODE only if lint checking is in effect.  */
 203 # define IF_LINT(Code) Code
 204 /* Assume that the expression COND is true.  This differs in intent
 205    from 'assert', as it is a message from the programmer to the compiler.  */
 206 # define lint_assume(cond) ((cond) ? (void) 0 : abort ())
 207 #else
 208 # define IF_LINT(Code) /* empty */
 209 # define lint_assume(cond) ((void) (0 && (cond)))
 210 #endif
 211
 212 /* conf_post.h ends here */