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code.delx.au - gnu-emacs/blob - src/conf_post.h
1 /* conf_post.h --- configure.ac includes this via AH_BOTTOM
3 Copyright (C) 1988, 1993-1994, 1999-2002, 2004-2016 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 (at
11 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 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. */
41 typedef unsigned int bool_bf
;
47 /* On AIX 3 this must be included before any other include file. */
50 # error "alloca not available on this machine"
54 /* Simulate __has_attribute on compilers that lack it. It is used only
55 on arguments like alloc_size that are handled in this simulation. */
56 #ifndef __has_attribute
57 # define __has_attribute(a) __has_attribute_##a
58 # define __has_attribute_alloc_size (4 < __GNUC__ + (3 <= __GNUC_MINOR__))
59 # define __has_attribute_cleanup (3 < __GNUC__ + (4 <= __GNUC_MINOR__))
60 # define __has_attribute_externally_visible \
61 (4 < __GNUC__ + (1 <= __GNUC_MINOR__))
62 # define __has_attribute_no_address_safety_analysis false
63 # define __has_attribute_no_sanitize_address \
64 (4 < __GNUC__ + (8 <= __GNUC_MINOR__))
67 /* Simulate __has_feature on compilers that lack it. It is used only
68 to define ADDRESS_SANITIZER below. */
70 # define __has_feature(a) false
73 /* True if addresses are being sanitized. */
74 #if defined __SANITIZE_ADDRESS__ || __has_feature (address_sanitizer)
75 # define ADDRESS_SANITIZER true
77 # define ADDRESS_SANITIZER false
82 #define malloc unexec_malloc
83 #define realloc unexec_realloc
84 #define free unexec_free
86 /* The following solves the problem that Emacs hangs when evaluating
87 (make-comint "test0" "/nodir/nofile" nil "") when /nodir/nofile
88 does not exist. Also, setsid is not allowed in the vfork child's
89 context as of Darwin 9/Mac OS X 10.5. */
90 #undef HAVE_WORKING_VFORK
92 #endif /* DARWIN_OS */
94 /* If HYBRID_MALLOC is defined (e.g., on Cygwin), emacs will use
95 gmalloc before dumping and the system malloc after dumping.
96 hybrid_malloc and friends, defined in gmalloc.c, are wrappers that
100 #define malloc hybrid_malloc
101 #define realloc hybrid_realloc
102 #define aligned_alloc hybrid_aligned_alloc
103 #define calloc hybrid_calloc
104 #define free hybrid_free
106 #endif /* HYBRID_MALLOC */
108 /* We have to go this route, rather than the old hpux9 approach of
109 renaming the functions via macros. The system's stdlib.h has fully
110 prototyped declarations, which yields a conflicting definition of
111 srand48; it tries to redeclare what was once srandom to be srand48.
112 So we go with HAVE_LRAND48 being defined. */
122 You lose
; /* Emacs for DOS must be compiled with DJGPP */
124 #define _NAIVE_DOS_REGS
126 /* Start of gnulib-related stuff */
128 /* lib/ftoastr.c wants strtold, but DJGPP only has _strtold. DJGPP >
129 2.03 has it, but it also has _strtold as a stub that jumps to
130 strtold, so use _strtold in all versions. */
131 #define strtold _strtold
133 #if __DJGPP__ > 2 || __DJGPP_MINOR__ > 3
134 # define HAVE_LSTAT 1
137 /* DJGPP 2.03 and older don't have the next two. */
138 # define EOVERFLOW ERANGE
139 # define SIZE_MAX 4294967295U
142 /* We must intercept 'opendir' calls to stash away the directory name,
143 so we could reuse it in readlinkat; see msdos.c. */
144 #define opendir sys_opendir
146 /* End of gnulib-related stuff. */
148 #define emacs_raise(sig) msdos_fatal_signal (sig)
150 /* DATA_START is needed by vm-limit.c and unexcoff.c. */
151 #define DATA_START (&etext + 1)
153 /* Define one of these for easier conditionals. */
154 #ifdef HAVE_X_WINDOWS
155 /* We need a little extra space, see ../../lisp/loadup.el and the
156 commentary below, in the non-X branch. The 140KB number was
157 measured on GNU/Linux and on MS-Windows. */
158 #define SYSTEM_PURESIZE_EXTRA (-170000+140000)
160 /* We need a little extra space, see ../../lisp/loadup.el.
161 As of 20091024, DOS-specific files use up 62KB of pure space. But
162 overall, we end up wasting 130KB of pure space, because
163 BASE_PURESIZE starts at 1.47MB, while we need only 1.3MB (including
164 non-DOS specific files and load history; the latter is about 55K,
165 but depends on the depth of the top-level Emacs directory in the
166 directory tree). Given the unknown policy of different DPMI
167 hosts regarding loading of untouched pages, I'm not going to risk
168 enlarging Emacs footprint by another 100+ KBytes. */
169 #define SYSTEM_PURESIZE_EXTRA (-170000+90000)
173 /* Mac OS X / GNUstep need a bit more pure memory. Of the existing knobs,
174 SYSTEM_PURESIZE_EXTRA seems like the least likely to cause problems. */
176 #if defined NS_IMPL_GNUSTEP
177 # define SYSTEM_PURESIZE_EXTRA 30000
178 #elif defined DARWIN_OS
179 # define SYSTEM_PURESIZE_EXTRA 200000
184 #define SYSTEM_PURESIZE_EXTRA 10000
187 #if defined HAVE_NTGUI && !defined DebPrint
189 extern void _DebPrint (const char *fmt
, ...);
190 # define DebPrint(stuff) _DebPrint stuff
192 # define DebPrint(stuff)
196 #if defined CYGWIN && defined HAVE_NTGUI
197 # define NTGUI_UNICODE /* Cygwin runs only on UNICODE-supporting systems */
198 # define _WIN32_WINNT 0x500 /* Win2k */
199 /* The following was in /usr/include/string.h prior to Cygwin 1.7.33. */
201 #define strnicmp strncasecmp
205 #ifdef emacs /* Don't do this for lib-src. */
206 /* Tell regex.c to use a type compatible with Emacs. */
207 #define RE_TRANSLATE_TYPE Lisp_Object
208 #define RE_TRANSLATE(TBL, C) char_table_translate (TBL, C)
209 #define RE_TRANSLATE_P(TBL) (!EQ (TBL, make_number (0)))
212 /* Tell time_rz.c to use Emacs's getter and setter for TZ.
213 Only Emacs uses time_rz so this is OK. */
214 #define getenv_TZ emacs_getenv_TZ
215 #define setenv_TZ emacs_setenv_TZ
216 extern char *emacs_getenv_TZ (void);
217 extern int emacs_setenv_TZ (char const *);
222 #if __GNUC__ >= 3 /* On GCC 3.0 we might get a warning. */
223 #define NO_INLINE __attribute__((noinline))
228 #if __has_attribute (externally_visible)
229 #define EXTERNALLY_VISIBLE __attribute__((externally_visible))
231 #define EXTERNALLY_VISIBLE
234 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
235 # define ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
237 # define ATTRIBUTE_FORMAT(spec) /* empty */
240 #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4)
241 # define ATTRIBUTE_FORMAT_PRINTF(formatstring_parameter, first_argument) \
242 ATTRIBUTE_FORMAT ((__gnu_printf__, formatstring_parameter, first_argument))
244 # define ATTRIBUTE_FORMAT_PRINTF(formatstring_parameter, first_argument) \
245 ATTRIBUTE_FORMAT ((__printf__, formatstring_parameter, first_argument))
248 #define ATTRIBUTE_CONST _GL_ATTRIBUTE_CONST
249 #define ATTRIBUTE_UNUSED _GL_UNUSED
252 # define ATTRIBUTE_MALLOC __attribute__ ((__malloc__))
254 # define ATTRIBUTE_MALLOC
257 #if __has_attribute (alloc_size)
258 # define ATTRIBUTE_ALLOC_SIZE(args) __attribute__ ((__alloc_size__ args))
260 # define ATTRIBUTE_ALLOC_SIZE(args)
263 #define ATTRIBUTE_MALLOC_SIZE(args) ATTRIBUTE_MALLOC ATTRIBUTE_ALLOC_SIZE (args)
265 /* Work around GCC bug 59600: when a function is inlined, the inlined
266 code may have its addresses sanitized even if the function has the
267 no_sanitize_address attribute. This bug is fixed in GCC 4.9.0 and
269 #if (! ADDRESS_SANITIZER \
270 || ((4 < __GNUC__ + (9 <= __GNUC_MINOR__)) \
271 || 3 < __clang_major__ + (4 <= __clang_minor__)))
272 # define ADDRESS_SANITIZER_WORKAROUND /* No workaround needed. */
274 # define ADDRESS_SANITIZER_WORKAROUND NO_INLINE
277 /* Attribute of functions whose code should not have addresses
280 #if __has_attribute (no_sanitize_address)
281 # define ATTRIBUTE_NO_SANITIZE_ADDRESS \
282 __attribute__ ((no_sanitize_address)) ADDRESS_SANITIZER_WORKAROUND
283 #elif __has_attribute (no_address_safety_analysis)
284 # define ATTRIBUTE_NO_SANITIZE_ADDRESS \
285 __attribute__ ((no_address_safety_analysis)) ADDRESS_SANITIZER_WORKAROUND
287 # define ATTRIBUTE_NO_SANITIZE_ADDRESS
290 /* Some versions of GNU/Linux define noinline in their headers. */
295 /* Use Gnulib's extern-inline module for extern inline functions.
296 An include file foo.h should prepend FOO_INLINE to function
297 definitions, with the following overall pattern:
299 [#include any other .h files first.]
311 For every executable, exactly one file that includes the header
314 #define INLINE EXTERN_INLINE
316 before including config.h or any other .h file.
317 Other .c files should not define INLINE.
318 For Emacs, this is done by having emacs.c first '#define INLINE
319 EXTERN_INLINE' and then include every .h file that uses INLINE.
321 The INLINE_HEADER_BEGIN and INLINE_HEADER_END suppress bogus
322 warnings in some GCC versions; see ../m4/extern-inline.m4.
324 C99 compilers compile functions like 'incr' as C99-style extern
325 inline functions. Buggy GCC implementations do something similar with
326 GNU-specific keywords. Buggy non-GCC compilers use static
327 functions, which bloats the code but is good enough. */
330 # define INLINE _GL_INLINE
332 #define EXTERN_INLINE _GL_EXTERN_INLINE
333 #define INLINE_HEADER_BEGIN _GL_INLINE_HEADER_BEGIN
334 #define INLINE_HEADER_END _GL_INLINE_HEADER_END
336 /* To use the struct hack with N elements, declare the struct like this:
337 struct s { ...; t name[FLEXIBLE_ARRAY_MEMBER]; };
338 and allocate (offsetof (struct s, name) + N * sizeof (t)) bytes.
339 IBM xlc 12.1 claims to do C99 but mishandles flexible array members. */
341 # define FLEXIBLE_ARRAY_MEMBER 1
343 # define FLEXIBLE_ARRAY_MEMBER
346 /* Use this to suppress gcc's `...may be used before initialized' warnings. */
348 /* Use CODE only if lint checking is in effect. */
349 # define IF_LINT(Code) Code
351 # define IF_LINT(Code) /* empty */
354 /* conf_post.h ends here */