[bpt/emacs.git] / src / conf_post.h

/* conf_post.h --- configure.ac includes this via AH_BOTTOM

Copyright (C) 1988, 1993-1994, 1999-2002, 2004-2014 Free Software
Foundation, Inc.

This file is part of GNU Emacs.

GNU Emacs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */

/* Commentary:

   Rather than writing this code directly in AH_BOTTOM, we include it
   via this file.  This is so that it does not get processed by
   autoheader.  Eg, any undefs here would otherwise be commented out.
*/

/* Code: */

/* Include any platform specific configuration file.  */
#ifdef config_opsysfile
# include config_opsysfile
#endif

#include <stdbool.h>

/* The pre-C99 <stdbool.h> emulation doesn't work for bool bitfields.
   Nor does compiling Objective-C with standard GCC.  */
#if __STDC_VERSION__ < 199901 || NS_IMPL_GNUSTEP
typedef unsigned int bool_bf;
#else
typedef bool bool_bf;
#endif

#ifndef WINDOWSNT
/* On AIX 3 this must be included before any other include file.  */
#include <alloca.h>
#if ! HAVE_ALLOCA
# error "alloca not available on this machine"
#endif
#endif

/* When not using Clang, assume its attributes and features are absent.  */
#ifndef __has_attribute
# define __has_attribute(a) false
#endif
#ifndef __has_feature
# define __has_feature(a) false
#endif

/* True if addresses are being sanitized.  */
#if defined __SANITIZE_ADDRESS__ || __has_feature (address_sanitizer)
# define ADDRESS_SANITIZER true
#else
# define ADDRESS_SANITIZER false
#endif

#ifdef DARWIN_OS
#ifdef emacs
#define malloc unexec_malloc
#define realloc unexec_realloc
#define free unexec_free
#endif
/* The following solves the problem that Emacs hangs when evaluating
   (make-comint "test0" "/nodir/nofile" nil "") when /nodir/nofile
   does not exist.  Also, setsid is not allowed in the vfork child's
   context as of Darwin 9/Mac OS X 10.5.  */
#undef HAVE_WORKING_VFORK
#define vfork fork
#endif  /* DARWIN_OS */

/* We have to go this route, rather than the old hpux9 approach of
   renaming the functions via macros.  The system's stdlib.h has fully
   prototyped declarations, which yields a conflicting definition of
   srand48; it tries to redeclare what was once srandom to be srand48.
   So we go with HAVE_LRAND48 being defined.  */
#ifdef HPUX
#undef srandom
#undef random
/* We try to avoid checking for random and rint on hpux in
   configure.ac, but some other configure test might check for them as
   a dependency, so to be safe we also undefine them here.
 */
#undef HAVE_RANDOM
#undef HAVE_RINT
#endif  /* HPUX */

#ifdef IRIX6_5
#ifdef emacs
char *_getpty();
#endif
#define INET6 /* Needed for struct sockaddr_in6.  */
#undef HAVE_GETADDRINFO /* IRIX has getaddrinfo but not struct addrinfo.  */
#endif /* IRIX6_5 */

#ifdef MSDOS
#ifndef __DJGPP__
You lose; /* Emacs for DOS must be compiled with DJGPP */
#endif
#define _NAIVE_DOS_REGS

/* Start of gnulib-related stuff  */

/* lib/ftoastr.c wants strtold, but DJGPP only has _strtold.  DJGPP >
   2.03 has it, but it also has _strtold as a stub that jumps to
   strtold, so use _strtold in all versions.  */
#define strtold _strtold

#if __DJGPP__ > 2 || __DJGPP_MINOR__ > 3
# define HAVE_LSTAT 1
#else
# define lstat stat
#endif

/* We must intercept 'opendir' calls to stash away the directory name,
   so we could reuse it in readlinkat; see msdos.c.  */
#define opendir sys_opendir

/* The "portable" definition of _GL_INLINE on config.h does not work
   with DJGPP GCC 3.4.4: it causes unresolved externals in sysdep.c,
   although lib/execinfo.h is included and the inline functions there
   are visible.  */
#if __GNUC__ < 4
# define _GL_EXECINFO_INLINE inline
#endif
/* End of gnulib-related stuff.  */

#define emacs_raise(sig) msdos_fatal_signal (sig)

/* DATA_START is needed by vm-limit.c and unexcoff.c. */
#define DATA_START (&etext + 1)

/* Define one of these for easier conditionals.  */
#ifdef HAVE_X_WINDOWS
/* We need a little extra space, see ../../lisp/loadup.el and the
   commentary below, in the non-X branch.  The 140KB number was
   measured on GNU/Linux and on MS-Windows.  */
#define SYSTEM_PURESIZE_EXTRA (-170000+140000)
#else
/* We need a little extra space, see ../../lisp/loadup.el.
   As of 20091024, DOS-specific files use up 62KB of pure space.  But
   overall, we end up wasting 130KB of pure space, because
   BASE_PURESIZE starts at 1.47MB, while we need only 1.3MB (including
   non-DOS specific files and load history; the latter is about 55K,
   but depends on the depth of the top-level Emacs directory in the
   directory tree).  Given the unknown policy of different DPMI
   hosts regarding loading of untouched pages, I'm not going to risk
   enlarging Emacs footprint by another 100+ KBytes.  */
#define SYSTEM_PURESIZE_EXTRA (-170000+90000)
#endif
#endif  /* MSDOS */

/* Mac OS X / GNUstep need a bit more pure memory.  Of the existing knobs,
   SYSTEM_PURESIZE_EXTRA seems like the least likely to cause problems.  */
#ifdef HAVE_NS
#if defined NS_IMPL_GNUSTEP
#  define SYSTEM_PURESIZE_EXTRA 30000
#elif defined DARWIN_OS
#  define SYSTEM_PURESIZE_EXTRA 200000
#endif
#endif

#ifdef CYGWIN
#define SYSTEM_PURESIZE_EXTRA 10000
#endif

#if defined HAVE_NTGUI && !defined DebPrint
# ifdef EMACSDEBUG
extern void _DebPrint (const char *fmt, ...);
#  define DebPrint(stuff) _DebPrint stuff
# else
#  define DebPrint(stuff)
# endif
#endif

#if defined CYGWIN && defined HAVE_NTGUI
# define NTGUI_UNICODE /* Cygwin runs only on UNICODE-supporting systems */
# define _WIN32_WINNT 0x500 /* Win2k */
#endif

#ifdef emacs /* Don't do this for lib-src.  */
/* Tell regex.c to use a type compatible with Emacs.  */
#define RE_TRANSLATE_TYPE Lisp_Object
#define RE_TRANSLATE(TBL, C) char_table_translate (TBL, C)
#define RE_TRANSLATE_P(TBL) (!EQ (TBL, make_number (0)))
#endif

#include <string.h>
#include <stdlib.h>

#if __GNUC__ >= 3  /* On GCC 3.0 we might get a warning.  */
#define NO_INLINE __attribute__((noinline))
#else
#define NO_INLINE
#endif

#if (__clang__								\
     ? __has_attribute (externally_visible)				\
     : (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)))
#define EXTERNALLY_VISIBLE __attribute__((externally_visible))
#else
#define EXTERNALLY_VISIBLE
#endif

#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
# define ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
#else
# define ATTRIBUTE_FORMAT(spec) /* empty */
#endif

#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4)
# define ATTRIBUTE_FORMAT_PRINTF(formatstring_parameter, first_argument) \
   ATTRIBUTE_FORMAT ((__gnu_printf__, formatstring_parameter, first_argument))
#else
# define ATTRIBUTE_FORMAT_PRINTF(formatstring_parameter, first_argument) \
   ATTRIBUTE_FORMAT ((__printf__, formatstring_parameter, first_argument))
#endif

#define ATTRIBUTE_CONST _GL_ATTRIBUTE_CONST

/* Work around GCC bug 59600: when a function is inlined, the inlined
   code may have its addresses sanitized even if the function has the
   no_sanitize_address attribute.  This bug is present in GCC 4.8.2
   and clang 3.3, the latest releases as of December 2013, and the
   only platforms known to support address sanitization.  When the bug
   is fixed the #if can be updated accordingly.  */
#if ADDRESS_SANITIZER
# define ADDRESS_SANITIZER_WORKAROUND NO_INLINE
#else
# define ADDRESS_SANITIZER_WORKAROUND
#endif

/* Attribute of functions whose code should not have addresses
   sanitized.  */

#if (__has_attribute (no_sanitize_address) \
     || 4 < __GNUC__ + (8 <= __GNUC_MINOR__))
# define ATTRIBUTE_NO_SANITIZE_ADDRESS \
    __attribute__ ((no_sanitize_address)) ADDRESS_SANITIZER_WORKAROUND
#elif __has_attribute (no_address_safety_analysis)
# define ATTRIBUTE_NO_SANITIZE_ADDRESS \
    __attribute__ ((no_address_safety_analysis)) ADDRESS_SANITIZER_WORKAROUND
#else
# define ATTRIBUTE_NO_SANITIZE_ADDRESS
#endif

/* Some versions of GNU/Linux define noinline in their headers.  */
#ifdef noinline
#undef noinline
#endif

/* Use Gnulib's extern-inline module for extern inline functions.
   An include file foo.h should prepend FOO_INLINE to function
   definitions, with the following overall pattern:

      [#include any other .h files first.]
      ...
      INLINE_HEADER_BEGIN
      ...
      INLINE int
      incr (int i)
      {
        return i + 1;
      }
      ...
      INLINE_HEADER_END

   For every executable, exactly one file that includes the header
   should do this:

      #define INLINE EXTERN_INLINE

   before including config.h or any other .h file.
   Other .c files should not define INLINE.

   C99 compilers compile functions like 'incr' as C99-style extern
   inline functions.  Pre-C99 GCCs do something similar with
   GNU-specific keywords.  Pre-C99 non-GCC compilers use static
   functions, which bloats the code but is good enough.  */

#ifndef INLINE
# define INLINE _GL_INLINE
#endif
#define EXTERN_INLINE _GL_EXTERN_INLINE
#define INLINE_HEADER_BEGIN _GL_INLINE_HEADER_BEGIN
#define INLINE_HEADER_END _GL_INLINE_HEADER_END

/* To use the struct hack with N elements, declare the struct like this:
     struct s { ...; t name[FLEXIBLE_ARRAY_MEMBER]; };
   and allocate (offsetof (struct s, name) + N * sizeof (t)) bytes.
   IBM xlc 12.1 claims to do C99 but mishandles flexible array members.  */
#if 199901 <= __STDC_VERSION__ && !defined __IBMC__
# define FLEXIBLE_ARRAY_MEMBER
#elif __GNUC__ && !defined __STRICT_ANSI__
# define FLEXIBLE_ARRAY_MEMBER 0
#else
# define FLEXIBLE_ARRAY_MEMBER 1
#endif

/* Use this to suppress gcc's `...may be used before initialized' warnings. */
#ifdef lint
/* Use CODE only if lint checking is in effect.  */
# define IF_LINT(Code) Code
#else
# define IF_LINT(Code) /* empty */
#endif

/* conf_post.h ends here */
Commit	Line	Data
b429a4ee GM	1	/* conf_post.h --- configure.ac includes this via AH_BOTTOM
b429a4ee GM	2
ba318903	3	Copyright (C) 1988, 1993-1994, 1999-2002, 2004-2014 Free Software
ab422c4d	4	Foundation, Inc.
b429a4ee GM	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
476b1b2d GM	30	/* Include any platform specific configuration file. */
	31	#ifdef config_opsysfile
	32	# include config_opsysfile
	33	#endif
	34
96c06863 PE	35	#include <stdbool.h>
96c06863 PE	36
30143e3d JD	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
96c06863 PE	40	typedef unsigned int bool_bf;
	41	#else
	42	typedef bool bool_bf;
	43	#endif
	44
476b1b2d	45	#ifndef WINDOWSNT
b429a4ee GM	46	/* On AIX 3 this must be included before any other include file. */
	47	#include <alloca.h>
	48	#if ! HAVE_ALLOCA
	49	# error "alloca not available on this machine"
	50	#endif
476b1b2d	51	#endif
b429a4ee	52
e76119d7	53	/* When not using Clang, assume its attributes and features are absent. */
7456e13f	54	#ifndef __has_attribute
e76119d7 PE	55	# define __has_attribute(a) false
	56	#endif
	57	#ifndef __has_feature
	58	# define __has_feature(a) false
	59	#endif
	60
	61	/* True if addresses are being sanitized. */
	62	#if defined __SANITIZE_ADDRESS__ \|\| __has_feature (address_sanitizer)
	63	# define ADDRESS_SANITIZER true
	64	#else
	65	# define ADDRESS_SANITIZER false
7456e13f PE	66	#endif
7456e13f PE	67
6a381852 GM	68	#ifdef DARWIN_OS
	69	#ifdef emacs
	70	#define malloc unexec_malloc
	71	#define realloc unexec_realloc
	72	#define free unexec_free
6a381852 GM	73	#endif
	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
	79	#define vfork fork
	80	#endif /* DARWIN_OS */
	81
aac1c9ac GM	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. */
	87	#ifdef HPUX
	88	#undef srandom
	89	#undef random
	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.
	93	*/
	94	#undef HAVE_RANDOM
	95	#undef HAVE_RINT
	96	#endif /* HPUX */
	97
bb2e3a6e GM	98	#ifdef IRIX6_5
	99	#ifdef emacs
	100	char *_getpty();
	101	#endif
13a5993b PE	102	#define INET6 /* Needed for struct sockaddr_in6. */
13a5993b PE	103	#undef HAVE_GETADDRINFO /* IRIX has getaddrinfo but not struct addrinfo. */
bb2e3a6e GM	104	#endif /* IRIX6_5 */
bb2e3a6e GM	105
fe3cc771 GM	106	#ifdef MSDOS
	107	#ifndef __DJGPP__
	108	You lose; /* Emacs for DOS must be compiled with DJGPP */
	109	#endif
	110	#define _NAIVE_DOS_REGS
	111
	112	/* Start of gnulib-related stuff */
	113
	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
	118
	119	#if __DJGPP__ > 2 \|\| __DJGPP_MINOR__ > 3
	120	# define HAVE_LSTAT 1
	121	#else
	122	# define lstat stat
	123	#endif
bf6b4923 EZ	124
bf6b4923 EZ	125	/* We must intercept 'opendir' calls to stash away the directory name,
4fa20d8f	126	so we could reuse it in readlinkat; see msdos.c. */
bf6b4923 EZ	127	#define opendir sys_opendir
bf6b4923 EZ	128
b3cf17f6 EZ	129	/* The "portable" definition of _GL_INLINE on config.h does not work
	130	with DJGPP GCC 3.4.4: it causes unresolved externals in sysdep.c,
	131	although lib/execinfo.h is included and the inline functions there
	132	are visible. */
	133	#if __GNUC__ < 4
	134	# define _GL_EXECINFO_INLINE inline
	135	#endif
fe3cc771 GM	136	/* End of gnulib-related stuff. */
fe3cc771 GM	137
b3cf17f6 EZ	138	#define emacs_raise(sig) msdos_fatal_signal (sig)
b3cf17f6 EZ	139
bf6b4923 EZ	140	/* DATA_START is needed by vm-limit.c and unexcoff.c. */
	141	#define DATA_START (&etext + 1)
	142
fe3cc771 GM	143	/* Define one of these for easier conditionals. */
	144	#ifdef HAVE_X_WINDOWS
	145	/* We need a little extra space, see ../../lisp/loadup.el and the
	146	commentary below, in the non-X branch. The 140KB number was
	147	measured on GNU/Linux and on MS-Windows. */
	148	#define SYSTEM_PURESIZE_EXTRA (-170000+140000)
	149	#else
	150	/* We need a little extra space, see ../../lisp/loadup.el.
	151	As of 20091024, DOS-specific files use up 62KB of pure space. But
	152	overall, we end up wasting 130KB of pure space, because
	153	BASE_PURESIZE starts at 1.47MB, while we need only 1.3MB (including
	154	non-DOS specific files and load history; the latter is about 55K,
	155	but depends on the depth of the top-level Emacs directory in the
	156	directory tree). Given the unknown policy of different DPMI
	157	hosts regarding loading of untouched pages, I'm not going to risk
	158	enlarging Emacs footprint by another 100+ KBytes. */
bf6b4923	159	#define SYSTEM_PURESIZE_EXTRA (-170000+90000)
fe3cc771	160	#endif
2e415bb7	161	#endif /* MSDOS */
fe3cc771	162
b429a4ee GM	163	/* Mac OS X / GNUstep need a bit more pure memory. Of the existing knobs,
	164	SYSTEM_PURESIZE_EXTRA seems like the least likely to cause problems. */
	165	#ifdef HAVE_NS
	166	#if defined NS_IMPL_GNUSTEP
	167	# define SYSTEM_PURESIZE_EXTRA 30000
	168	#elif defined DARWIN_OS
	169	# define SYSTEM_PURESIZE_EXTRA 200000
	170	#endif
	171	#endif
	172
9c67d3ba KB	173	#ifdef CYGWIN
	174	#define SYSTEM_PURESIZE_EXTRA 10000
	175	#endif
	176
a9e7a9d5 PE	177	#if defined HAVE_NTGUI && !defined DebPrint
a9e7a9d5 PE	178	# ifdef EMACSDEBUG
0fda9b75 DC	179	extern void _DebPrint (const char *fmt, ...);
	180	# define DebPrint(stuff) _DebPrint stuff
	181	# else
	182	# define DebPrint(stuff)
a9e7a9d5 PE	183	# endif
a9e7a9d5 PE	184	#endif
0fda9b75	185
a9e7a9d5 PE	186	#if defined CYGWIN && defined HAVE_NTGUI
	187	# define NTGUI_UNICODE /* Cygwin runs only on UNICODE-supporting systems */
	188	# define _WIN32_WINNT 0x500 /* Win2k */
	189	#endif
0fda9b75	190
b429a4ee GM	191	#ifdef emacs /* Don't do this for lib-src. */
	192	/* Tell regex.c to use a type compatible with Emacs. */
	193	#define RE_TRANSLATE_TYPE Lisp_Object
e3ccf108	194	#define RE_TRANSLATE(TBL, C) char_table_translate (TBL, C)
b429a4ee	195	#define RE_TRANSLATE_P(TBL) (!EQ (TBL, make_number (0)))
b429a4ee GM	196	#endif
	197
	198	#include <string.h>
	199	#include <stdlib.h>
	200
	201	#if __GNUC__ >= 3 /* On GCC 3.0 we might get a warning. */
	202	#define NO_INLINE __attribute__((noinline))
	203	#else
	204	#define NO_INLINE
	205	#endif
	206
7456e13f PE	207	#if (__clang__ \
	208	? __has_attribute (externally_visible) \
	209	: (__GNUC__ > 4 \|\| (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)))
b429a4ee GM	210	#define EXTERNALLY_VISIBLE __attribute__((externally_visible))
	211	#else
	212	#define EXTERNALLY_VISIBLE
	213	#endif
	214
	215	#if __GNUC__ > 2 \|\| (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
	216	# define ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
	217	#else
	218	# define ATTRIBUTE_FORMAT(spec) /* empty */
	219	#endif
	220
	221	#if __GNUC__ > 4 \|\| (__GNUC__ == 4 && __GNUC_MINOR__ >= 4)
	222	# define ATTRIBUTE_FORMAT_PRINTF(formatstring_parameter, first_argument) \
	223	ATTRIBUTE_FORMAT ((__gnu_printf__, formatstring_parameter, first_argument))
	224	#else
	225	# define ATTRIBUTE_FORMAT_PRINTF(formatstring_parameter, first_argument) \
	226	ATTRIBUTE_FORMAT ((__printf__, formatstring_parameter, first_argument))
	227	#endif
	228
	229	#define ATTRIBUTE_CONST _GL_ATTRIBUTE_CONST
	230
e76119d7 PE	231	/* Work around GCC bug 59600: when a function is inlined, the inlined
	232	code may have its addresses sanitized even if the function has the
	233	no_sanitize_address attribute. This bug is present in GCC 4.8.2
	234	and clang 3.3, the latest releases as of December 2013, and the
	235	only platforms known to support address sanitization. When the bug
	236	is fixed the #if can be updated accordingly. */
	237	#if ADDRESS_SANITIZER
	238	# define ADDRESS_SANITIZER_WORKAROUND NO_INLINE
	239	#else
	240	# define ADDRESS_SANITIZER_WORKAROUND
	241	#endif
	242
	243	/* Attribute of functions whose code should not have addresses
	244	sanitized. */
	245
	246	#if (__has_attribute (no_sanitize_address) \
	247	\|\| 4 < __GNUC__ + (8 <= __GNUC_MINOR__))
	248	# define ATTRIBUTE_NO_SANITIZE_ADDRESS \
	249	__attribute__ ((no_sanitize_address)) ADDRESS_SANITIZER_WORKAROUND
	250	#elif __has_attribute (no_address_safety_analysis)
	251	# define ATTRIBUTE_NO_SANITIZE_ADDRESS \
	252	__attribute__ ((no_address_safety_analysis)) ADDRESS_SANITIZER_WORKAROUND
	253	#else
	254	# define ATTRIBUTE_NO_SANITIZE_ADDRESS
	255	#endif
	256
b429a4ee GM	257	/* Some versions of GNU/Linux define noinline in their headers. */
	258	#ifdef noinline
	259	#undef noinline
	260	#endif
	261
0d6224d4 PE	262	/* Use Gnulib's extern-inline module for extern inline functions.
	263	An include file foo.h should prepend FOO_INLINE to function
	264	definitions, with the following overall pattern:
	265
	266	[#include any other .h files first.]
	267	...
	268	INLINE_HEADER_BEGIN
0d6224d4	269	...
00382e8b	270	INLINE int
0d6224d4 PE	271	incr (int i)
	272	{
	273	return i + 1;
	274	}
	275	...
	276	INLINE_HEADER_END
	277
00382e8b PE	278	For every executable, exactly one file that includes the header
00382e8b PE	279	should do this:
0d6224d4	280
00382e8b	281	#define INLINE EXTERN_INLINE
0d6224d4	282
00382e8b PE	283	before including config.h or any other .h file.
00382e8b PE	284	Other .c files should not define INLINE.
0d6224d4 PE	285
	286	C99 compilers compile functions like 'incr' as C99-style extern
	287	inline functions. Pre-C99 GCCs do something similar with
	288	GNU-specific keywords. Pre-C99 non-GCC compilers use static
	289	functions, which bloats the code but is good enough. */
	290
00382e8b PE	291	#ifndef INLINE
	292	# define INLINE _GL_INLINE
	293	#endif
f162bcc3 PE	294	#define EXTERN_INLINE _GL_EXTERN_INLINE
	295	#define INLINE_HEADER_BEGIN _GL_INLINE_HEADER_BEGIN
	296	#define INLINE_HEADER_END _GL_INLINE_HEADER_END
	297
fbe9e0b9 PE	298	/* To use the struct hack with N elements, declare the struct like this:
fbe9e0b9 PE	299	struct s { ...; t name[FLEXIBLE_ARRAY_MEMBER]; };
1915d8d6 PE	300	and allocate (offsetof (struct s, name) + N * sizeof (t)) bytes.
	301	IBM xlc 12.1 claims to do C99 but mishandles flexible array members. */
	302	#if 199901 <= __STDC_VERSION__ && !defined __IBMC__
fbe9e0b9 PE	303	# define FLEXIBLE_ARRAY_MEMBER
	304	#elif __GNUC__ && !defined __STRICT_ANSI__
	305	# define FLEXIBLE_ARRAY_MEMBER 0
	306	#else
	307	# define FLEXIBLE_ARRAY_MEMBER 1
	308	#endif
	309
25e65510 GM	310	/* Use this to suppress gcc's `...may be used before initialized' warnings. */
	311	#ifdef lint
	312	/* Use CODE only if lint checking is in effect. */
	313	# define IF_LINT(Code) Code
25e65510 GM	314	#else
25e65510 GM	315	# define IF_LINT(Code) /* empty */
25e65510 GM	316	#endif
25e65510 GM	317
b429a4ee	318	/* conf_post.h ends here */