| 1 | /* conf_post.h --- configure.ac includes this via AH_BOTTOM |
| 2 | |
| 3 | Copyright (C) 1988, 1993-1994, 1999-2002, 2004-2014 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 | #include <stdbool.h> |
| 36 | |
| 37 | /* The type of bool bitfields. Needed to compile Objective-C with |
| 38 | standard GCC. It was also needed to port to pre-C99 compilers, |
| 39 | although we don't care about that any more. */ |
| 40 | #if NS_IMPL_GNUSTEP |
| 41 | typedef unsigned int bool_bf; |
| 42 | #else |
| 43 | typedef bool bool_bf; |
| 44 | #endif |
| 45 | |
| 46 | #ifndef WINDOWSNT |
| 47 | /* On AIX 3 this must be included before any other include file. */ |
| 48 | #include <alloca.h> |
| 49 | #if ! HAVE_ALLOCA |
| 50 | # error "alloca not available on this machine" |
| 51 | #endif |
| 52 | #endif |
| 53 | |
| 54 | /* When not using Clang, assume its attributes and features are absent. */ |
| 55 | #ifndef __has_attribute |
| 56 | # define __has_attribute(a) false |
| 57 | #endif |
| 58 | #ifndef __has_feature |
| 59 | # define __has_feature(a) false |
| 60 | #endif |
| 61 | |
| 62 | /* True if addresses are being sanitized. */ |
| 63 | #if defined __SANITIZE_ADDRESS__ || __has_feature (address_sanitizer) |
| 64 | # define ADDRESS_SANITIZER true |
| 65 | #else |
| 66 | # define ADDRESS_SANITIZER false |
| 67 | #endif |
| 68 | |
| 69 | #ifdef DARWIN_OS |
| 70 | #ifdef emacs |
| 71 | #define malloc unexec_malloc |
| 72 | #define realloc unexec_realloc |
| 73 | #define free unexec_free |
| 74 | #endif |
| 75 | /* The following solves the problem that Emacs hangs when evaluating |
| 76 | (make-comint "test0" "/nodir/nofile" nil "") when /nodir/nofile |
| 77 | does not exist. Also, setsid is not allowed in the vfork child's |
| 78 | context as of Darwin 9/Mac OS X 10.5. */ |
| 79 | #undef HAVE_WORKING_VFORK |
| 80 | #define vfork fork |
| 81 | #endif /* DARWIN_OS */ |
| 82 | |
| 83 | /* We have to go this route, rather than the old hpux9 approach of |
| 84 | renaming the functions via macros. The system's stdlib.h has fully |
| 85 | prototyped declarations, which yields a conflicting definition of |
| 86 | srand48; it tries to redeclare what was once srandom to be srand48. |
| 87 | So we go with HAVE_LRAND48 being defined. */ |
| 88 | #ifdef HPUX |
| 89 | #undef srandom |
| 90 | #undef random |
| 91 | #undef HAVE_RANDOM |
| 92 | #undef HAVE_RINT |
| 93 | #endif /* HPUX */ |
| 94 | |
| 95 | #ifdef IRIX6_5 |
| 96 | #ifdef emacs |
| 97 | char *_getpty(); |
| 98 | #endif |
| 99 | #define INET6 /* Needed for struct sockaddr_in6. */ |
| 100 | #undef HAVE_GETADDRINFO /* IRIX has getaddrinfo but not struct addrinfo. */ |
| 101 | #endif /* IRIX6_5 */ |
| 102 | |
| 103 | #ifdef MSDOS |
| 104 | #ifndef __DJGPP__ |
| 105 | You lose; /* Emacs for DOS must be compiled with DJGPP */ |
| 106 | #endif |
| 107 | #define _NAIVE_DOS_REGS |
| 108 | |
| 109 | /* Start of gnulib-related stuff */ |
| 110 | |
| 111 | /* lib/ftoastr.c wants strtold, but DJGPP only has _strtold. DJGPP > |
| 112 | 2.03 has it, but it also has _strtold as a stub that jumps to |
| 113 | strtold, so use _strtold in all versions. */ |
| 114 | #define strtold _strtold |
| 115 | |
| 116 | #if __DJGPP__ > 2 || __DJGPP_MINOR__ > 3 |
| 117 | # define HAVE_LSTAT 1 |
| 118 | #else |
| 119 | # define lstat stat |
| 120 | #endif |
| 121 | |
| 122 | /* We must intercept 'opendir' calls to stash away the directory name, |
| 123 | so we could reuse it in readlinkat; see msdos.c. */ |
| 124 | #define opendir sys_opendir |
| 125 | |
| 126 | /* The "portable" definition of _GL_INLINE on config.h does not work |
| 127 | with DJGPP GCC 3.4.4: it causes unresolved externals in sysdep.c, |
| 128 | although lib/execinfo.h is included and the inline functions there |
| 129 | are visible. */ |
| 130 | #if __GNUC__ < 4 |
| 131 | # define _GL_EXECINFO_INLINE inline |
| 132 | #endif |
| 133 | /* End of gnulib-related stuff. */ |
| 134 | |
| 135 | #define emacs_raise(sig) msdos_fatal_signal (sig) |
| 136 | |
| 137 | /* DATA_START is needed by vm-limit.c and unexcoff.c. */ |
| 138 | #define DATA_START (&etext + 1) |
| 139 | |
| 140 | /* Define one of these for easier conditionals. */ |
| 141 | #ifdef HAVE_X_WINDOWS |
| 142 | /* We need a little extra space, see ../../lisp/loadup.el and the |
| 143 | commentary below, in the non-X branch. The 140KB number was |
| 144 | measured on GNU/Linux and on MS-Windows. */ |
| 145 | #define SYSTEM_PURESIZE_EXTRA (-170000+140000) |
| 146 | #else |
| 147 | /* We need a little extra space, see ../../lisp/loadup.el. |
| 148 | As of 20091024, DOS-specific files use up 62KB of pure space. But |
| 149 | overall, we end up wasting 130KB of pure space, because |
| 150 | BASE_PURESIZE starts at 1.47MB, while we need only 1.3MB (including |
| 151 | non-DOS specific files and load history; the latter is about 55K, |
| 152 | but depends on the depth of the top-level Emacs directory in the |
| 153 | directory tree). Given the unknown policy of different DPMI |
| 154 | hosts regarding loading of untouched pages, I'm not going to risk |
| 155 | enlarging Emacs footprint by another 100+ KBytes. */ |
| 156 | #define SYSTEM_PURESIZE_EXTRA (-170000+90000) |
| 157 | #endif |
| 158 | #endif /* MSDOS */ |
| 159 | |
| 160 | /* Mac OS X / GNUstep need a bit more pure memory. Of the existing knobs, |
| 161 | SYSTEM_PURESIZE_EXTRA seems like the least likely to cause problems. */ |
| 162 | #ifdef HAVE_NS |
| 163 | #if defined NS_IMPL_GNUSTEP |
| 164 | # define SYSTEM_PURESIZE_EXTRA 30000 |
| 165 | #elif defined DARWIN_OS |
| 166 | # define SYSTEM_PURESIZE_EXTRA 200000 |
| 167 | #endif |
| 168 | #endif |
| 169 | |
| 170 | #ifdef CYGWIN |
| 171 | #define SYSTEM_PURESIZE_EXTRA 10000 |
| 172 | #endif |
| 173 | |
| 174 | #if defined HAVE_NTGUI && !defined DebPrint |
| 175 | # ifdef EMACSDEBUG |
| 176 | extern void _DebPrint (const char *fmt, ...); |
| 177 | # define DebPrint(stuff) _DebPrint stuff |
| 178 | # else |
| 179 | # define DebPrint(stuff) |
| 180 | # endif |
| 181 | #endif |
| 182 | |
| 183 | #if defined CYGWIN && defined HAVE_NTGUI |
| 184 | # define NTGUI_UNICODE /* Cygwin runs only on UNICODE-supporting systems */ |
| 185 | # define _WIN32_WINNT 0x500 /* Win2k */ |
| 186 | #endif |
| 187 | |
| 188 | #ifdef emacs /* Don't do this for lib-src. */ |
| 189 | /* Tell regex.c to use a type compatible with Emacs. */ |
| 190 | #define RE_TRANSLATE_TYPE Lisp_Object |
| 191 | #define RE_TRANSLATE(TBL, C) char_table_translate (TBL, C) |
| 192 | #define RE_TRANSLATE_P(TBL) (!EQ (TBL, make_number (0))) |
| 193 | #endif |
| 194 | |
| 195 | #include <string.h> |
| 196 | #include <stdlib.h> |
| 197 | |
| 198 | #if __GNUC__ >= 3 /* On GCC 3.0 we might get a warning. */ |
| 199 | #define NO_INLINE __attribute__((noinline)) |
| 200 | #else |
| 201 | #define NO_INLINE |
| 202 | #endif |
| 203 | |
| 204 | #if (__clang__ \ |
| 205 | ? __has_attribute (externally_visible) \ |
| 206 | : (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1))) |
| 207 | #define EXTERNALLY_VISIBLE __attribute__((externally_visible)) |
| 208 | #else |
| 209 | #define EXTERNALLY_VISIBLE |
| 210 | #endif |
| 211 | |
| 212 | #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7) |
| 213 | # define ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec)) |
| 214 | #else |
| 215 | # define ATTRIBUTE_FORMAT(spec) /* empty */ |
| 216 | #endif |
| 217 | |
| 218 | #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4) |
| 219 | # define ATTRIBUTE_FORMAT_PRINTF(formatstring_parameter, first_argument) \ |
| 220 | ATTRIBUTE_FORMAT ((__gnu_printf__, formatstring_parameter, first_argument)) |
| 221 | #else |
| 222 | # define ATTRIBUTE_FORMAT_PRINTF(formatstring_parameter, first_argument) \ |
| 223 | ATTRIBUTE_FORMAT ((__printf__, formatstring_parameter, first_argument)) |
| 224 | #endif |
| 225 | |
| 226 | #define ATTRIBUTE_CONST _GL_ATTRIBUTE_CONST |
| 227 | |
| 228 | #if 3 <= __GNUC__ |
| 229 | # define ATTRIBUTE_MALLOC __attribute__ ((__malloc__)) |
| 230 | #else |
| 231 | # define ATTRIBUTE_MALLOC |
| 232 | #endif |
| 233 | |
| 234 | #if 4 < __GNUC__ + (3 <= __GNUC_MINOR__) |
| 235 | # define ATTRIBUTE_ALLOC_SIZE(args) __attribute__ ((__alloc_size__ args)) |
| 236 | #else |
| 237 | # define ATTRIBUTE_ALLOC_SIZE(args) |
| 238 | #endif |
| 239 | |
| 240 | #define ATTRIBUTE_MALLOC_SIZE(args) ATTRIBUTE_MALLOC ATTRIBUTE_ALLOC_SIZE (args) |
| 241 | |
| 242 | /* Work around GCC bug 59600: when a function is inlined, the inlined |
| 243 | code may have its addresses sanitized even if the function has the |
| 244 | no_sanitize_address attribute. This bug is fixed in GCC 4.9.0 and |
| 245 | clang 3.4. */ |
| 246 | #if (! ADDRESS_SANITIZER \ |
| 247 | || ((4 < __GNUC__ + (9 <= __GNUC_MINOR__)) \ |
| 248 | || 3 < __clang_major__ + (4 <= __clang_minor__))) |
| 249 | # define ADDRESS_SANITIZER_WORKAROUND /* No workaround needed. */ |
| 250 | #else |
| 251 | # define ADDRESS_SANITIZER_WORKAROUND NO_INLINE |
| 252 | #endif |
| 253 | |
| 254 | /* Attribute of functions whose code should not have addresses |
| 255 | sanitized. */ |
| 256 | |
| 257 | #if (__has_attribute (no_sanitize_address) \ |
| 258 | || 4 < __GNUC__ + (8 <= __GNUC_MINOR__)) |
| 259 | # define ATTRIBUTE_NO_SANITIZE_ADDRESS \ |
| 260 | __attribute__ ((no_sanitize_address)) ADDRESS_SANITIZER_WORKAROUND |
| 261 | #elif __has_attribute (no_address_safety_analysis) |
| 262 | # define ATTRIBUTE_NO_SANITIZE_ADDRESS \ |
| 263 | __attribute__ ((no_address_safety_analysis)) ADDRESS_SANITIZER_WORKAROUND |
| 264 | #else |
| 265 | # define ATTRIBUTE_NO_SANITIZE_ADDRESS |
| 266 | #endif |
| 267 | |
| 268 | /* Some versions of GNU/Linux define noinline in their headers. */ |
| 269 | #ifdef noinline |
| 270 | #undef noinline |
| 271 | #endif |
| 272 | |
| 273 | /* Use Gnulib's extern-inline module for extern inline functions. |
| 274 | An include file foo.h should prepend FOO_INLINE to function |
| 275 | definitions, with the following overall pattern: |
| 276 | |
| 277 | [#include any other .h files first.] |
| 278 | ... |
| 279 | INLINE_HEADER_BEGIN |
| 280 | ... |
| 281 | INLINE int |
| 282 | incr (int i) |
| 283 | { |
| 284 | return i + 1; |
| 285 | } |
| 286 | ... |
| 287 | INLINE_HEADER_END |
| 288 | |
| 289 | For every executable, exactly one file that includes the header |
| 290 | should do this: |
| 291 | |
| 292 | #define INLINE EXTERN_INLINE |
| 293 | |
| 294 | before including config.h or any other .h file. |
| 295 | Other .c files should not define INLINE. |
| 296 | |
| 297 | C99 compilers compile functions like 'incr' as C99-style extern |
| 298 | inline functions. Pre-C99 GCCs do something similar with |
| 299 | GNU-specific keywords. Pre-C99 non-GCC compilers use static |
| 300 | functions, which bloats the code but is good enough. */ |
| 301 | |
| 302 | #ifndef INLINE |
| 303 | # define INLINE _GL_INLINE |
| 304 | #endif |
| 305 | #define EXTERN_INLINE _GL_EXTERN_INLINE |
| 306 | #define INLINE_HEADER_BEGIN _GL_INLINE_HEADER_BEGIN |
| 307 | #define INLINE_HEADER_END _GL_INLINE_HEADER_END |
| 308 | |
| 309 | /* To use the struct hack with N elements, declare the struct like this: |
| 310 | struct s { ...; t name[FLEXIBLE_ARRAY_MEMBER]; }; |
| 311 | and allocate (offsetof (struct s, name) + N * sizeof (t)) bytes. |
| 312 | |
| 313 | This macro used to expand to something different on pre-C99 compilers. |
| 314 | FIXME: Remove it, and remove all uses. */ |
| 315 | #define FLEXIBLE_ARRAY_MEMBER |
| 316 | |
| 317 | /* Use this to suppress gcc's `...may be used before initialized' warnings. */ |
| 318 | #ifdef lint |
| 319 | /* Use CODE only if lint checking is in effect. */ |
| 320 | # define IF_LINT(Code) Code |
| 321 | #else |
| 322 | # define IF_LINT(Code) /* empty */ |
| 323 | #endif |
| 324 | |
| 325 | /* conf_post.h ends here */ |