src/conf_post.h

   1 /* conf_post.h --- configure.ac includes this via AH_BOTTOM
   2
   3 Copyright (C) 1988, 1993-1994, 1999-2002, 2004-2013 Free Software
   4 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 #ifndef __has_attribute
  44 # define __has_attribute(a) 0 /* non-clang */
  45 #endif
  46
  47 /* This silences a few compilation warnings on FreeBSD.  */
  48 #ifdef BSD_SYSTEM_AHB
  49 #undef BSD_SYSTEM_AHB
  50 #undef BSD_SYSTEM
  51 #if __FreeBSD__ == 1
  52 #define BSD_SYSTEM 199103
  53 #elif __FreeBSD__ == 2
  54 #define BSD_SYSTEM 199306
  55 #elif __FreeBSD__ >= 3
  56 #define BSD_SYSTEM 199506
  57 #endif
  58 #endif
  59
  60 #ifdef DARWIN_OS
  61 #ifdef emacs
  62 #define malloc unexec_malloc
  63 #define realloc unexec_realloc
  64 #define free unexec_free
  65 /* Don't use posix_memalign because it is not compatible with unexmacosx.c.  */
  66 #undef HAVE_POSIX_MEMALIGN
  67 #endif
  68 /* The following solves the problem that Emacs hangs when evaluating
  69    (make-comint "test0" "/nodir/nofile" nil "") when /nodir/nofile
  70    does not exist.  Also, setsid is not allowed in the vfork child's
  71    context as of Darwin 9/Mac OS X 10.5.  */
  72 #undef HAVE_WORKING_VFORK
  73 #define vfork fork
  74 #endif  /* DARWIN_OS */
  75
  76 /* We have to go this route, rather than the old hpux9 approach of
  77    renaming the functions via macros.  The system's stdlib.h has fully
  78    prototyped declarations, which yields a conflicting definition of
  79    srand48; it tries to redeclare what was once srandom to be srand48.
  80    So we go with HAVE_LRAND48 being defined.  */
  81 #ifdef HPUX
  82 #undef srandom
  83 #undef random
  84 /* We try to avoid checking for random and rint on hpux in
  85    configure.ac, but some other configure test might check for them as
  86    a dependency, so to be safe we also undefine them here.
  87  */
  88 #undef HAVE_RANDOM
  89 #undef HAVE_RINT
  90 #endif  /* HPUX */
  91
  92 #ifdef IRIX6_5
  93 #ifdef emacs
  94 char *_getpty();
  95 #endif
  96
  97 #endif /* IRIX6_5 */
  98
  99 #ifdef MSDOS
 100 #ifndef __DJGPP__
 101 You lose; /* Emacs for DOS must be compiled with DJGPP */
 102 #endif
 103 #define _NAIVE_DOS_REGS
 104
 105 /* Start of gnulib-related stuff  */
 106
 107 /* lib/ftoastr.c wants strtold, but DJGPP only has _strtold.  DJGPP >
 108    2.03 has it, but it also has _strtold as a stub that jumps to
 109    strtold, so use _strtold in all versions.  */
 110 #define strtold _strtold
 111
 112 #if __DJGPP__ > 2 || __DJGPP_MINOR__ > 3
 113 # define HAVE_LSTAT 1
 114 #else
 115 # define lstat stat
 116 #endif
 117 /* The "portable" definition of _GL_INLINE on config.h does not work
 118    with DJGPP GCC 3.4.4: it causes unresolved externals in sysdep.c,
 119    although lib/execinfo.h is included and the inline functions there
 120    are visible.  */
 121 #if __GNUC__ < 4
 122 # define _GL_EXECINFO_INLINE inline
 123 #endif
 124 /* End of gnulib-related stuff.  */
 125
 126 #define emacs_raise(sig) msdos_fatal_signal (sig)
 127
 128 /* Define one of these for easier conditionals.  */
 129 #ifdef HAVE_X_WINDOWS
 130 /* We need a little extra space, see ../../lisp/loadup.el and the
 131    commentary below, in the non-X branch.  The 140KB number was
 132    measured on GNU/Linux and on MS-Windows.  */
 133 #define SYSTEM_PURESIZE_EXTRA (-170000+140000)
 134 #else
 135 /* We need a little extra space, see ../../lisp/loadup.el.
 136    As of 20091024, DOS-specific files use up 62KB of pure space.  But
 137    overall, we end up wasting 130KB of pure space, because
 138    BASE_PURESIZE starts at 1.47MB, while we need only 1.3MB (including
 139    non-DOS specific files and load history; the latter is about 55K,
 140    but depends on the depth of the top-level Emacs directory in the
 141    directory tree).  Given the unknown policy of different DPMI
 142    hosts regarding loading of untouched pages, I'm not going to risk
 143    enlarging Emacs footprint by another 100+ KBytes.  */
 144 #define SYSTEM_PURESIZE_EXTRA (-170000+65000)
 145 #endif
 146 #endif  /* MSDOS */
 147
 148 /* Mac OS X / GNUstep need a bit more pure memory.  Of the existing knobs,
 149    SYSTEM_PURESIZE_EXTRA seems like the least likely to cause problems.  */
 150 #ifdef HAVE_NS
 151 #if defined NS_IMPL_GNUSTEP
 152 #  define SYSTEM_PURESIZE_EXTRA 30000
 153 #elif defined DARWIN_OS
 154 #  define SYSTEM_PURESIZE_EXTRA 200000
 155 #endif
 156 #endif
 157
 158 #if defined HAVE_NTGUI && !defined DebPrint
 159 # ifdef EMACSDEBUG
 160 extern void _DebPrint (const char *fmt, ...);
 161 #  define DebPrint(stuff) _DebPrint stuff
 162 # else
 163 #  define DebPrint(stuff)
 164 # endif
 165 #endif
 166
 167 #if defined CYGWIN && defined HAVE_NTGUI
 168 # define NTGUI_UNICODE /* Cygwin runs only on UNICODE-supporting systems */
 169 # define _WIN32_WINNT 0x500 /* Win2k */
 170 #endif
 171
 172 #ifdef emacs /* Don't do this for lib-src.  */
 173 /* Tell regex.c to use a type compatible with Emacs.  */
 174 #define RE_TRANSLATE_TYPE Lisp_Object
 175 #define RE_TRANSLATE(TBL, C) char_table_translate (TBL, C)
 176 #ifdef make_number
 177 /* If make_number is a macro, use it.  */
 178 #define RE_TRANSLATE_P(TBL) (!EQ (TBL, make_number (0)))
 179 #else
 180 /* If make_number is a function, avoid it.  */
 181 #define RE_TRANSLATE_P(TBL) (!(INTEGERP (TBL) && XINT (TBL) == 0))
 182 #endif
 183 #endif
 184
 185 /* Tell gnulib to omit support for openat-related functions having a
 186    first argument other than AT_FDCWD.  */
 187 #define GNULIB_SUPPORT_ONLY_AT_FDCWD
 188
 189 #include <string.h>
 190 #include <stdlib.h>
 191
 192 #if __GNUC__ >= 3  /* On GCC 3.0 we might get a warning.  */
 193 #define NO_INLINE __attribute__((noinline))
 194 #else
 195 #define NO_INLINE
 196 #endif
 197
 198 #if (__clang__                                                          \
 199      ? __has_attribute (externally_visible)                             \
 200      : (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)))
 201 #define EXTERNALLY_VISIBLE __attribute__((externally_visible))
 202 #else
 203 #define EXTERNALLY_VISIBLE
 204 #endif
 205
 206 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
 207 # define ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
 208 #else
 209 # define ATTRIBUTE_FORMAT(spec) /* empty */
 210 #endif
 211
 212 #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4)
 213 # define ATTRIBUTE_FORMAT_PRINTF(formatstring_parameter, first_argument) \
 214    ATTRIBUTE_FORMAT ((__gnu_printf__, formatstring_parameter, first_argument))
 215 #else
 216 # define ATTRIBUTE_FORMAT_PRINTF(formatstring_parameter, first_argument) \
 217    ATTRIBUTE_FORMAT ((__printf__, formatstring_parameter, first_argument))
 218 #endif
 219
 220 #define ATTRIBUTE_CONST _GL_ATTRIBUTE_CONST
 221
 222 /* Some versions of GNU/Linux define noinline in their headers.  */
 223 #ifdef noinline
 224 #undef noinline
 225 #endif
 226
 227 #define INLINE _GL_INLINE
 228 #define EXTERN_INLINE _GL_EXTERN_INLINE
 229 #define INLINE_HEADER_BEGIN _GL_INLINE_HEADER_BEGIN
 230 #define INLINE_HEADER_END _GL_INLINE_HEADER_END
 231
 232 /* Use this to suppress gcc's `...may be used before initialized' warnings. */
 233 #ifdef lint
 234 /* Use CODE only if lint checking is in effect.  */
 235 # define IF_LINT(Code) Code
 236 /* Assume that the expression COND is true.  This differs in intent
 237    from 'assert', as it is a message from the programmer to the compiler.  */
 238 # define lint_assume(cond) ((cond) ? (void) 0 : abort ())
 239 #else
 240 # define IF_LINT(Code) /* empty */
 241 # define lint_assume(cond) ((void) (0 && (cond)))
 242 #endif
 243
 244 /* conf_post.h ends here */