1 /* conf_post.h --- configure.ac includes this via AH_BOTTOM
3 Copyright (C) 1988, 1993-1994, 1999-2002, 2004-2014 Free Software
6 This file is part of GNU Emacs.
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.
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.
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/>. */
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.
30 /* Include any platform specific configuration file. */
31 #ifdef config_opsysfile
32 # include config_opsysfile
37 /* The pre-C99 <stdbool.h> emulation doesn't work for bool bitfields.
38 Nor does compiling Objective-C with standard GCC. */
39 #if __STDC_VERSION__ < 199901 || NS_IMPL_GNUSTEP
40 typedef unsigned int bool_bf
;
46 /* On AIX 3 this must be included before any other include file. */
49 # error "alloca not available on this machine"
53 /* When not using Clang, assume its attributes and features are absent. */
54 #ifndef __has_attribute
55 # define __has_attribute(a) false
58 # define __has_feature(a) false
61 /* True if addresses are being sanitized. */
62 #if defined __SANITIZE_ADDRESS__ || __has_feature (address_sanitizer)
63 # define ADDRESS_SANITIZER true
65 # define ADDRESS_SANITIZER false
70 #define malloc unexec_malloc
71 #define realloc unexec_realloc
72 #define free unexec_free
74 /* The following solves the problem that Emacs hangs when evaluating
75 (make-comint "test0" "/nodir/nofile" nil "") when /nodir/nofile
76 does not exist. Also, setsid is not allowed in the vfork child's
77 context as of Darwin 9/Mac OS X 10.5. */
78 #undef HAVE_WORKING_VFORK
80 #endif /* DARWIN_OS */
82 /* We have to go this route, rather than the old hpux9 approach of
83 renaming the functions via macros. The system's stdlib.h has fully
84 prototyped declarations, which yields a conflicting definition of
85 srand48; it tries to redeclare what was once srandom to be srand48.
86 So we go with HAVE_LRAND48 being defined. */
90 /* We try to avoid checking for random and rint on hpux in
91 configure.ac, but some other configure test might check for them as
92 a dependency, so to be safe we also undefine them here.
102 #define INET6 /* Needed for struct sockaddr_in6. */
103 #undef HAVE_GETADDRINFO /* IRIX has getaddrinfo but not struct addrinfo. */
108 You lose
; /* Emacs for DOS must be compiled with DJGPP */
110 #define _NAIVE_DOS_REGS
112 /* Start of gnulib-related stuff */
114 /* lib/ftoastr.c wants strtold, but DJGPP only has _strtold. DJGPP >
115 2.03 has it, but it also has _strtold as a stub that jumps to
116 strtold, so use _strtold in all versions. */
117 #define strtold _strtold
119 #if __DJGPP__ > 2 || __DJGPP_MINOR__ > 3
120 # define HAVE_LSTAT 1
125 /* We must intercept 'opendir' calls to stash away the directory name,
126 so we could reuse it in readlinkat; see msdos.c. */
127 #define opendir sys_opendir
129 /* End of gnulib-related stuff. */
131 #define emacs_raise(sig) msdos_fatal_signal (sig)
133 /* DATA_START is needed by vm-limit.c and unexcoff.c. */
134 #define DATA_START (&etext + 1)
136 /* Define one of these for easier conditionals. */
137 #ifdef HAVE_X_WINDOWS
138 /* We need a little extra space, see ../../lisp/loadup.el and the
139 commentary below, in the non-X branch. The 140KB number was
140 measured on GNU/Linux and on MS-Windows. */
141 #define SYSTEM_PURESIZE_EXTRA (-170000+140000)
143 /* We need a little extra space, see ../../lisp/loadup.el.
144 As of 20091024, DOS-specific files use up 62KB of pure space. But
145 overall, we end up wasting 130KB of pure space, because
146 BASE_PURESIZE starts at 1.47MB, while we need only 1.3MB (including
147 non-DOS specific files and load history; the latter is about 55K,
148 but depends on the depth of the top-level Emacs directory in the
149 directory tree). Given the unknown policy of different DPMI
150 hosts regarding loading of untouched pages, I'm not going to risk
151 enlarging Emacs footprint by another 100+ KBytes. */
152 #define SYSTEM_PURESIZE_EXTRA (-170000+90000)
156 /* Mac OS X / GNUstep need a bit more pure memory. Of the existing knobs,
157 SYSTEM_PURESIZE_EXTRA seems like the least likely to cause problems. */
159 #if defined NS_IMPL_GNUSTEP
160 # define SYSTEM_PURESIZE_EXTRA 30000
161 #elif defined DARWIN_OS
162 # define SYSTEM_PURESIZE_EXTRA 200000
167 #define SYSTEM_PURESIZE_EXTRA 10000
170 #if defined HAVE_NTGUI && !defined DebPrint
172 extern void _DebPrint (const char *fmt
, ...);
173 # define DebPrint(stuff) _DebPrint stuff
175 # define DebPrint(stuff)
179 #if defined CYGWIN && defined HAVE_NTGUI
180 # define NTGUI_UNICODE /* Cygwin runs only on UNICODE-supporting systems */
181 # define _WIN32_WINNT 0x500 /* Win2k */
184 #ifdef emacs /* Don't do this for lib-src. */
185 /* Tell regex.c to use a type compatible with Emacs. */
186 #define RE_TRANSLATE_TYPE Lisp_Object
187 #define RE_TRANSLATE(TBL, C) char_table_translate (TBL, C)
188 #define RE_TRANSLATE_P(TBL) (!EQ (TBL, make_number (0)))
194 #if __GNUC__ >= 3 /* On GCC 3.0 we might get a warning. */
195 #define NO_INLINE __attribute__((noinline))
201 ? __has_attribute (externally_visible) \
202 : (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)))
203 #define EXTERNALLY_VISIBLE __attribute__((externally_visible))
205 #define EXTERNALLY_VISIBLE
208 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
209 # define ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
211 # define ATTRIBUTE_FORMAT(spec) /* empty */
214 #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4)
215 # define ATTRIBUTE_FORMAT_PRINTF(formatstring_parameter, first_argument) \
216 ATTRIBUTE_FORMAT ((__gnu_printf__, formatstring_parameter, first_argument))
218 # define ATTRIBUTE_FORMAT_PRINTF(formatstring_parameter, first_argument) \
219 ATTRIBUTE_FORMAT ((__printf__, formatstring_parameter, first_argument))
222 #define ATTRIBUTE_CONST _GL_ATTRIBUTE_CONST
224 /* Work around GCC bug 59600: when a function is inlined, the inlined
225 code may have its addresses sanitized even if the function has the
226 no_sanitize_address attribute. This bug is present in GCC 4.8.2
227 and clang 3.3, the latest releases as of December 2013, and the
228 only platforms known to support address sanitization. When the bug
229 is fixed the #if can be updated accordingly. */
230 #if ADDRESS_SANITIZER
231 # define ADDRESS_SANITIZER_WORKAROUND NO_INLINE
233 # define ADDRESS_SANITIZER_WORKAROUND
236 /* Attribute of functions whose code should not have addresses
239 #if (__has_attribute (no_sanitize_address) \
240 || 4 < __GNUC__ + (8 <= __GNUC_MINOR__))
241 # define ATTRIBUTE_NO_SANITIZE_ADDRESS \
242 __attribute__ ((no_sanitize_address)) ADDRESS_SANITIZER_WORKAROUND
243 #elif __has_attribute (no_address_safety_analysis)
244 # define ATTRIBUTE_NO_SANITIZE_ADDRESS \
245 __attribute__ ((no_address_safety_analysis)) ADDRESS_SANITIZER_WORKAROUND
247 # define ATTRIBUTE_NO_SANITIZE_ADDRESS
250 /* Some versions of GNU/Linux define noinline in their headers. */
255 /* Use Gnulib's extern-inline module for extern inline functions.
256 An include file foo.h should prepend FOO_INLINE to function
257 definitions, with the following overall pattern:
259 [#include any other .h files first.]
271 For every executable, exactly one file that includes the header
274 #define INLINE EXTERN_INLINE
276 before including config.h or any other .h file.
277 Other .c files should not define INLINE.
279 C99 compilers compile functions like 'incr' as C99-style extern
280 inline functions. Pre-C99 GCCs do something similar with
281 GNU-specific keywords. Pre-C99 non-GCC compilers use static
282 functions, which bloats the code but is good enough. */
285 # define INLINE _GL_INLINE
287 #define EXTERN_INLINE _GL_EXTERN_INLINE
288 #define INLINE_HEADER_BEGIN _GL_INLINE_HEADER_BEGIN
289 #define INLINE_HEADER_END _GL_INLINE_HEADER_END
291 /* To use the struct hack with N elements, declare the struct like this:
292 struct s { ...; t name[FLEXIBLE_ARRAY_MEMBER]; };
293 and allocate (offsetof (struct s, name) + N * sizeof (t)) bytes.
294 IBM xlc 12.1 claims to do C99 but mishandles flexible array members. */
295 #if 199901 <= __STDC_VERSION__ && !defined __IBMC__
296 # define FLEXIBLE_ARRAY_MEMBER
297 #elif __GNUC__ && !defined __STRICT_ANSI__
298 # define FLEXIBLE_ARRAY_MEMBER 0
300 # define FLEXIBLE_ARRAY_MEMBER 1
303 /* Use this to suppress gcc's `...may be used before initialized' warnings. */
305 /* Use CODE only if lint checking is in effect. */
306 # define IF_LINT(Code) Code
308 # define IF_LINT(Code) /* empty */
311 /* conf_post.h ends here */