[bpt/emacs.git] / src / s / gnu-linux.h

/* This file is the configuration file for Linux-based GNU systems
   Copyright (C) 1985, 1986, 1992, 1994, 1996, 1999, 2001, 2002, 2003, 2004,
                 2005, 2006, 2007, 2008  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/>.  */

/* This file was put together by Michael K. Johnson and Rik Faith.  */


/*
 *	Define symbols to identify the version of Unix this is.
 *	Define all the symbols that apply correctly.
 */

/* #define USG5 */
#define USG
/* #define BSD_SYSTEM */
#define GNU_LINUX

/* SYSTEM_TYPE should indicate the kind of system you are using.
 It sets the Lisp variable system-type.  */

#define SYSTEM_TYPE "gnu/linux"		/* All the best software is free. */

#ifndef NOT_C_CODE
#ifdef emacs
#ifdef HAVE_LINUX_VERSION_H
#include <linux/version.h>

#if LINUX_VERSION_CODE >= 0x20400
/* 21 Jun 06: Eric Hanchrow <offby1@blarg.net> says this works.  */
#define SIGNALS_VIA_CHARACTERS
#endif /* LINUX_VERSION_CODE >= 0x20400 */
#endif /* HAVE_LINUX_VERSION_H */
#endif /* emacs */
#endif /* NOT_C_CODE */

#if defined HAVE_GRANTPT
#define UNIX98_PTYS

/* Run only once.  We need a `for'-loop because the code uses
   `continue'.  */

#define PTY_ITERATION	for (i = 0; i < 1; i++)

#ifdef HAVE_GETPT
#define PTY_NAME_SPRINTF
#define PTY_OPEN fd = getpt ()
#else /* not HAVE_GETPT */
#define PTY_NAME_SPRINTF strcpy (pty_name, "/dev/ptmx");
#endif /* not HAVE_GETPT */

/* Note that grantpt and unlockpt may fork.  We must block SIGCHLD to
   prevent sigchld_handler from intercepting the child's death.  */

#define PTY_TTY_NAME_SPRINTF				\
  {							\
    char *ptyname;					\
							\
    sigblock (sigmask (SIGCHLD));			\
    if (grantpt (fd) == -1 || unlockpt (fd) == -1	\
        || !(ptyname = ptsname(fd)))			\
      {							\
	sigunblock (sigmask (SIGCHLD));			\
	close (fd);					\
	return -1;					\
      }							\
    strncpy (pty_name, ptyname, sizeof (pty_name));	\
    pty_name[sizeof (pty_name) - 1] = 0;		\
    sigunblock (sigmask (SIGCHLD));			\
  }

#else /* not HAVE_GRANTPT */

/* Letter to use in finding device name of first pty,
   if system supports pty's.  'p' means it is /dev/ptyp0  */

#define FIRST_PTY_LETTER 'p'

#endif  /* not HAVE_GRANDPT */

/*  Define HAVE_TERMIOS if the system provides POSIX-style
    functions and macros for terminal control.  */

#define HAVE_TERMIOS

/* Define HAVE_PTYS if the system supports pty devices. */

#define HAVE_PTYS

#define HAVE_SOCKETS

/* Define this symbol if your system has the functions bcopy, etc. */

#define BSTRING

/* subprocesses should be defined if you want to
   have code for asynchronous subprocesses
   (as used in M-x compile and M-x shell).
   This is generally OS dependent, and not supported
   under most USG systems. */

#define subprocesses

/* define MAIL_USE_FLOCK if the mailer uses flock
   to interlock access to /usr/spool/mail/$USER.
   The alternative is that a lock file named
   /usr/spool/mail/$USER.lock.  */

/* On GNU/Linux systems, both methods are used by various mail
   programs.  I assume that most people are using newer mailers that
   have heard of flock.  Change this if you need to. */
/* Debian contains a patch which says: ``On Debian/GNU/Linux systems,
   configure gets the right answers, and that means *NOT* using flock.
   Using flock is guaranteed to be the wrong thing. See Debian Policy
   for details.'' and then uses `#ifdef DEBIAN'.  Unfortunately the
   Debian maintainer hasn't provided a clean fix for Emacs.
   movemail.c will use `maillock' when MAILDIR, HAVE_LIBMAIL and
   HAVE_MAILLOCK_H are defined, so the following appears to be the
   correct logic.  -- fx */
/* We must check for HAVE_LIBLOCKFILE too, as movemail does.
   liblockfile is a Free Software replacement for libmail, used on
   Debian systems and elsewhere. -rfr */

#if !((defined (HAVE_LIBMAIL) || defined (HAVE_LIBLOCKFILE)) &&	\
      defined (HAVE_MAILLOCK_H))
#define MAIL_USE_FLOCK
#endif

/* Define CLASH_DETECTION if you want lock files to be written
   so that Emacs can tell instantly when you try to modify
   a file that someone else has modified in his Emacs.  */

#define CLASH_DETECTION

/* Here, on a separate page, add any special hacks needed
   to make Emacs work on this system.  For example,
   you might define certain system call names that don't
   exist on your system, or that do different things on
   your system and must be used only through an encapsulation
   (Which you should place, by convention, in sysdep.c).  */
\f
/* If you mount the proc file system somewhere other than /proc
   you will have to uncomment the following and make the proper
   changes */

/* #define LINUX_LDAV_FILE "/proc/loadavg" */

/* This is needed for dispnew.c:update_frame */

#ifdef emacs
#include <stdio.h>  /* Get the definition of _IO_STDIO_H.  */
#if defined(_IO_STDIO_H) || defined(_STDIO_USES_IOSTREAM)
/* new C libio names */
#define GNU_LIBRARY_PENDING_OUTPUT_COUNT(FILE) \
  ((FILE)->_IO_write_ptr - (FILE)->_IO_write_base)
#else /* !_IO_STDIO_H */
/* old C++ iostream names */
#define GNU_LIBRARY_PENDING_OUTPUT_COUNT(FILE) \
  ((FILE)->_pptr - (FILE)->_pbase)
#endif /* !_IO_STDIO_H */
#endif /* emacs */

/* Ask GCC where to find libgcc.a.  */
#define LIB_GCC `$(CC) $(C_SWITCH_X_SITE) -print-libgcc-file-name`

#define START_FILES pre-crt0.o /usr/lib/crt1.o /usr/lib/crti.o

/* Here is how to find X Windows.  LD_SWITCH_X_SITE_AUX gives an -R option
   says where to find X windows at run time.  */

#ifdef __mips__
#define LD_SWITCH_SYSTEM -G 0 LD_SWITCH_X_SITE_AUX
#else
#define LD_SWITCH_SYSTEM LD_SWITCH_X_SITE_AUX
#endif /* __mips__ */

/* Link temacs with -z nocombreloc so that unexec works right, whether or
   not -z combreloc is the default.  GNU ld ignores unknown -z KEYWORD
   switches, so this also works with older versions that don't implement
   -z combreloc.  */
#define LD_SWITCH_SYSTEM_TEMACS -z nocombreloc

#ifdef emacs
#define INTERRUPT_INPUT
#endif

/* This is needed for sysdep.c */

#define NO_SIOCTL_H           /* don't have sioctl.h */

#define SYSV_SYSTEM_DIR       /* use dirent.h */

#define POSIX                 /* affects getpagesize.h and systty.h */
#define POSIX_SIGNALS

/* Best not to include -lg, unless it is last on the command line */
#define LIBS_DEBUG
#undef LIB_GCC
#define LIB_GCC
#define LIB_STANDARD -lgcc -lc -lgcc /usr/lib/crtn.o

/* Don't use -g in test compiles in configure.
   This is so we will use the same shared libs for that linking
   that are used when linking temacs.  */
#ifdef THIS_IS_CONFIGURE
#define C_DEBUG_SWITCH
#endif

/* Rob Malouf <malouf@csli.stanford.edu> says:
   SYSV IPC is standard a standard part of Linux since version 0.99pl10,
   and is a very common addition to previous versions.  */

#ifdef TERM
#define LIBS_SYSTEM -lclient
#define C_SWITCH_SYSTEM -D_BSD_SOURCE -I/usr/src/term
#else
/* alane@wozzle.linet.org says that -lipc is not a separate library,
   since libc-4.4.1.  So -lipc was deleted.  */
#define LIBS_SYSTEM
/* _BSD_SOURCE is redundant, at least in glibc2, since we define
   _GNU_SOURCE.  Left in in case it's relevant to libc5 systems and
   anyone's still using Emacs on those.  --fx 2002-12-14  */
#define C_SWITCH_SYSTEM -D_BSD_SOURCE
#endif

/* Paul Abrahams <abrahams@equinox.shaysnet.com> says this is needed.  */
#define LIB_MOTIF -lXm -lXpm

#ifdef HAVE_LIBNCURSES
#define TERMINFO
#define LIBS_TERMCAP -lncurses
#endif

#define HAVE_SYSVIPC

#define UNEXEC unexelf.o

#define A_TEXT_OFFSET(hdr) (N_MAGIC(hdr) == QMAGIC ? sizeof (struct exec) : 0)
#define A_TEXT_SEEK(hdr) (N_TXTOFF(hdr) + A_TEXT_OFFSET(hdr))
#define ADJUST_EXEC_HEADER \
  unexec_text_start = N_TXTADDR(ohdr) + A_TEXT_OFFSET(ohdr)

/* This is to work around mysterious gcc failures in some system versions.
   It is unlikely that Emacs changes will work around this problem;
   therefore, this should remain permanently.  */
#ifndef HAVE_XRMSETDATABASE
#define HAVE_XRMSETDATABASE
#endif

/* Use BSD process groups, but use setpgid() instead of setpgrp() to
   actually set a process group. */

#define BSD_PGRPS

#define NARROWPROTO 1

/* Use mmap directly for allocating larger buffers.  */
#ifdef DOUG_LEA_MALLOC
#undef REL_ALLOC
#endif

/* Tell that garbage collector that setjmp is known to save all
   registers relevant for conservative garbage collection in the
   jmp_buf.  */
/* Not all the architectures are tested, but there are Debian packages
   for SCM and/or Guile on them, so the technique must work.  See also
   comments in alloc.c concerning setjmp and gcc.  Fixme:  it's
   probably safe to make this conditional just on GCC, except for ia64
   register window-flushing.  */
/* Don't use #cpu here since in newest development versions of GCC,
   we must call cpp with -traditional, and that disables #cpu.  */

#if defined __i386__ || defined __sparc__ || defined __mc68000__ \
    || defined __alpha__ || defined __mips__ || defined __s390__ \
    || defined __arm__ || defined __powerpc__ || defined __amd64__ \
    || defined __ia64__
#define GC_SETJMP_WORKS 1
#define GC_MARK_STACK GC_MAKE_GCPROS_NOOPS
#ifdef __mc68000__
#define GC_LISP_OBJECT_ALIGNMENT 2
#endif
#ifdef __ia64__
#define GC_MARK_SECONDARY_STACK()				\
  do {								\
    extern void *__libc_ia64_register_backing_store_base;	\
    __builtin_ia64_flushrs ();					\
    mark_memory (__libc_ia64_register_backing_store_base,	\
		 __builtin_ia64_bsp (), 0);			\
  } while (0)
#endif
#endif

/* arch-tag: 6244ea2a-abd0-44ec-abec-ff3dcc9afea9
   (do not change this comment) */
Commit	Line	Data
3a707ba5	1	/* This file is the configuration file for Linux-based GNU systems
429ab54e	2	Copyright (C) 1985, 1986, 1992, 1994, 1996, 1999, 2001, 2002, 2003, 2004,
01122546	3	2005, 2006, 2007, 2008 Free Software Foundation, Inc.
566e3587 JB	4
	5	This file is part of GNU Emacs.
	6
4b158629	7	GNU Emacs is free software: you can redistribute it and/or modify
566e3587	8	it under the terms of the GNU General Public License as published by
4b158629 GM	9	the Free Software Foundation, either version 3 of the License, or
4b158629 GM	10	(at your option) any later version.
566e3587 JB	11
	12	GNU Emacs is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
4b158629	18	along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
566e3587	19
b49ef455 JB	20	/* This file was put together by Michael K. Johnson and Rik Faith. */
b49ef455 JB	21
566e3587 JB	22
	23	/*
	24	* Define symbols to identify the version of Unix this is.
	25	* Define all the symbols that apply correctly.
	26	*/
	27
566e3587 JB	28	/* #define USG5 */
566e3587 JB	29	#define USG
8e4c450d	30	/* #define BSD_SYSTEM */
8db5530a	31	#define GNU_LINUX
566e3587 JB	32
	33	/* SYSTEM_TYPE should indicate the kind of system you are using.
	34	It sets the Lisp variable system-type. */
	35
3a707ba5	36	#define SYSTEM_TYPE "gnu/linux" /* All the best software is free. */
566e3587	37
65953053 RS	38	#ifndef NOT_C_CODE
65953053 RS	39	#ifdef emacs
b764619d	40	#ifdef HAVE_LINUX_VERSION_H
65953053	41	#include <linux/version.h>
566e3587	42
85a71b37	43	#if LINUX_VERSION_CODE >= 0x20400
c5e7567d DN	44	/* 21 Jun 06: Eric Hanchrow <offby1@blarg.net> says this works. */
c5e7567d DN	45	#define SIGNALS_VIA_CHARACTERS
85a71b37	46	#endif /* LINUX_VERSION_CODE >= 0x20400 */
b764619d	47	#endif /* HAVE_LINUX_VERSION_H */
aa7fcbb0 RS	48	#endif /* emacs */
aa7fcbb0 RS	49	#endif /* NOT_C_CODE */
566e3587	50
71125fb8 GM	51	#if defined HAVE_GRANTPT
71125fb8 GM	52	#define UNIX98_PTYS
566e3587	53
71125fb8 GM	54	/* Run only once. We need a `for'-loop because the code uses
71125fb8 GM	55	`continue'. */
566e3587	56
71125fb8	57	#define PTY_ITERATION for (i = 0; i < 1; i++)
fdc5e0fc	58
71125fb8 GM	59	#ifdef HAVE_GETPT
	60	#define PTY_NAME_SPRINTF
	61	#define PTY_OPEN fd = getpt ()
	62	#else /* not HAVE_GETPT */
	63	#define PTY_NAME_SPRINTF strcpy (pty_name, "/dev/ptmx");
	64	#endif /* not HAVE_GETPT */
	65
	66	/* Note that grantpt and unlockpt may fork. We must block SIGCHLD to
	67	prevent sigchld_handler from intercepting the child's death. */
	68
	69	#define PTY_TTY_NAME_SPRINTF \
	70	{ \
	71	char *ptyname; \
	72	\
	73	sigblock (sigmask (SIGCHLD)); \
	74	if (grantpt (fd) == -1 \|\| unlockpt (fd) == -1 \
	75	\|\| !(ptyname = ptsname(fd))) \
	76	{ \
	77	sigunblock (sigmask (SIGCHLD)); \
	78	close (fd); \
	79	return -1; \
	80	} \
	81	strncpy (pty_name, ptyname, sizeof (pty_name)); \
	82	pty_name[sizeof (pty_name) - 1] = 0; \
	83	sigunblock (sigmask (SIGCHLD)); \
	84	}
fdc5e0fc	85
dacbb818	86	#else /* not HAVE_GRANTPT */
fdc5e0fc	87
71125fb8 GM	88	/* Letter to use in finding device name of first pty,
71125fb8 GM	89	if system supports pty's. 'p' means it is /dev/ptyp0 */
fdc5e0fc	90
71125fb8	91	#define FIRST_PTY_LETTER 'p'
fdc5e0fc	92
71125fb8	93	#endif /* not HAVE_GRANDPT */
fdc5e0fc	94
71125fb8 GM	95	/* Define HAVE_TERMIOS if the system provides POSIX-style
71125fb8 GM	96	functions and macros for terminal control. */
566e3587 JB	97
	98	#define HAVE_TERMIOS
	99
71125fb8	100	/* Define HAVE_PTYS if the system supports pty devices. */
566e3587 JB	101
	102	#define HAVE_PTYS
	103
dad29761	104	#define HAVE_SOCKETS
566e3587 JB	105
	106	/* Define this symbol if your system has the functions bcopy, etc. */
	107
	108	#define BSTRING
	109
	110	/* subprocesses should be defined if you want to
	111	have code for asynchronous subprocesses
	112	(as used in M-x compile and M-x shell).
	113	This is generally OS dependent, and not supported
	114	under most USG systems. */
	115
	116	#define subprocesses
	117
	118	/* define MAIL_USE_FLOCK if the mailer uses flock
	119	to interlock access to /usr/spool/mail/$USER.
	120	The alternative is that a lock file named
	121	/usr/spool/mail/$USER.lock. */
	122
3a707ba5 RS	123	/* On GNU/Linux systems, both methods are used by various mail
	124	programs. I assume that most people are using newer mailers that
	125	have heard of flock. Change this if you need to. */
828a3791 DL	126	/* Debian contains a patch which says: ``On Debian/GNU/Linux systems,
	127	configure gets the right answers, and that means NOT using flock.
	128	Using flock is guaranteed to be the wrong thing. See Debian Policy
	129	for details.'' and then uses `#ifdef DEBIAN'. Unfortunately the
	130	Debian maintainer hasn't provided a clean fix for Emacs.
	131	movemail.c will use `maillock' when MAILDIR, HAVE_LIBMAIL and
	132	HAVE_MAILLOCK_H are defined, so the following appears to be the
	133	correct logic. -- fx */
47a0ee40 RF	134	/* We must check for HAVE_LIBLOCKFILE too, as movemail does.
	135	liblockfile is a Free Software replacement for libmail, used on
	136	Debian systems and elsewhere. -rfr */
828a3791	137
47a0ee40 RF	138	#if !((defined (HAVE_LIBMAIL) \|\| defined (HAVE_LIBLOCKFILE)) && \
47a0ee40 RF	139	defined (HAVE_MAILLOCK_H))
566e3587	140	#define MAIL_USE_FLOCK
828a3791	141	#endif
566e3587 JB	142
	143	/* Define CLASH_DETECTION if you want lock files to be written
	144	so that Emacs can tell instantly when you try to modify
	145	a file that someone else has modified in his Emacs. */
	146
b2e209ba	147	#define CLASH_DETECTION
566e3587 JB	148
	149	/* Here, on a separate page, add any special hacks needed
	150	to make Emacs work on this system. For example,
	151	you might define certain system call names that don't
	152	exist on your system, or that do different things on
	153	your system and must be used only through an encapsulation
	154	(Which you should place, by convention, in sysdep.c). */
	155	\f
566e3587 JB	156	/* If you mount the proc file system somewhere other than /proc
	157	you will have to uncomment the following and make the proper
	158	changes */
	159
	160	/* #define LINUX_LDAV_FILE "/proc/loadavg" */
	161
fde448f4	162	/* This is needed for dispnew.c:update_frame */
566e3587	163
5e5623c2	164	#ifdef emacs
a9c82aaf	165	#include <stdio.h> /* Get the definition of _IO_STDIO_H. */
4dee6d0d	166	#if defined(_IO_STDIO_H) \|\| defined(_STDIO_USES_IOSTREAM)
5e5623c2	167	/* new C libio names */
c2c3f859	168	#define GNU_LIBRARY_PENDING_OUTPUT_COUNT(FILE) \
5e5623c2 RS	169	((FILE)->_IO_write_ptr - (FILE)->_IO_write_base)
	170	#else /* !_IO_STDIO_H */
	171	/* old C++ iostream names */
c2c3f859	172	#define GNU_LIBRARY_PENDING_OUTPUT_COUNT(FILE) \
5e5623c2 RS	173	((FILE)->_pptr - (FILE)->_pbase)
	174	#endif /* !_IO_STDIO_H */
	175	#endif /* emacs */
566e3587	176
5101db23	177	/* Ask GCC where to find libgcc.a. */
08ddf771	178	#define LIB_GCC `$(CC) $(C_SWITCH_X_SITE) -print-libgcc-file-name`
5101db23	179
01b79236	180	#define START_FILES pre-crt0.o /usr/lib/crt1.o /usr/lib/crti.o
566e3587	181
588a9a3e RS	182	/* Here is how to find X Windows. LD_SWITCH_X_SITE_AUX gives an -R option
588a9a3e RS	183	says where to find X windows at run time. */
a28c4a8e	184
f649aa04 RS	185	#ifdef __mips__
	186	#define LD_SWITCH_SYSTEM -G 0 LD_SWITCH_X_SITE_AUX
	187	#else
588a9a3e	188	#define LD_SWITCH_SYSTEM LD_SWITCH_X_SITE_AUX
f649aa04	189	#endif /* __mips__ */
854ad2d5 AS	190
854ad2d5 AS	191	/* Link temacs with -z nocombreloc so that unexec works right, whether or
75bec752	192	not -z combreloc is the default. GNU ld ignores unknown -z KEYWORD
854ad2d5 AS	193	switches, so this also works with older versions that don't implement
	194	-z combreloc. */
	195	#define LD_SWITCH_SYSTEM_TEMACS -z nocombreloc
588a9a3e	196
566e3587	197	#ifdef emacs
65953053	198	#define INTERRUPT_INPUT
65953053	199	#endif
566e3587 JB	200
	201	/* This is needed for sysdep.c */
	202
566e3587 JB	203	#define NO_SIOCTL_H /* don't have sioctl.h */
566e3587 JB	204
566e3587	205	#define SYSV_SYSTEM_DIR /* use dirent.h */
566e3587	206
1abbab7a	207	#define POSIX /* affects getpagesize.h and systty.h */
566e3587 JB	208	#define POSIX_SIGNALS
566e3587 JB	209
566e3587 JB	210	/* Best not to include -lg, unless it is last on the command line */
566e3587 JB	211	#define LIBS_DEBUG
08ddf771	212	#undef LIB_GCC
4dee6d0d	213	#define LIB_GCC
01b79236	214	#define LIB_STANDARD -lgcc -lc -lgcc /usr/lib/crtn.o
3233bbe1	215
6f10bc9d RS	216	/* Don't use -g in test compiles in configure.
	217	This is so we will use the same shared libs for that linking
	218	that are used when linking temacs. */
	219	#ifdef THIS_IS_CONFIGURE
	220	#define C_DEBUG_SWITCH
	221	#endif
	222
9199fa7f JB	223	/* Rob Malouf <malouf@csli.stanford.edu> says:
	224	SYSV IPC is standard a standard part of Linux since version 0.99pl10,
	225	and is a very common addition to previous versions. */
cafdb68a RS	226
cafdb68a RS	227	#ifdef TERM
1077bc04	228	#define LIBS_SYSTEM -lclient
cafdb68a RS	229	#define C_SWITCH_SYSTEM -D_BSD_SOURCE -I/usr/src/term
cafdb68a RS	230	#else
edb0cf8d RS	231	/* alane@wozzle.linet.org says that -lipc is not a separate library,
edb0cf8d RS	232	since libc-4.4.1. So -lipc was deleted. */
1077bc04	233	#define LIBS_SYSTEM
e7b6b572 DL	234	/* _BSD_SOURCE is redundant, at least in glibc2, since we define
	235	_GNU_SOURCE. Left in in case it's relevant to libc5 systems and
	236	anyone's still using Emacs on those. --fx 2002-12-14 */
f83a1ae3	237	#define C_SWITCH_SYSTEM -D_BSD_SOURCE
cafdb68a RS	238	#endif
cafdb68a RS	239
c7ce28ce RS	240	/* Paul Abrahams <abrahams@equinox.shaysnet.com> says this is needed. */
	241	#define LIB_MOTIF -lXm -lXpm
	242
be1d1a1a	243	#ifdef HAVE_LIBNCURSES
65953053	244	#define TERMINFO
565b8b0d	245	#define LIBS_TERMCAP -lncurses
65953053 RS	246	#endif
65953053 RS	247
9199fa7f	248	#define HAVE_SYSVIPC
b04101bb	249
4dee6d0d	250	#define UNEXEC unexelf.o
8427dec9	251
b04101bb RS	252	#define A_TEXT_OFFSET(hdr) (N_MAGIC(hdr) == QMAGIC ? sizeof (struct exec) : 0)
	253	#define A_TEXT_SEEK(hdr) (N_TXTOFF(hdr) + A_TEXT_OFFSET(hdr))
	254	#define ADJUST_EXEC_HEADER \
	255	unexec_text_start = N_TXTADDR(ohdr) + A_TEXT_OFFSET(ohdr)
967ac200	256
639f52d8 RS	257	/* This is to work around mysterious gcc failures in some system versions.
	258	It is unlikely that Emacs changes will work around this problem;
	259	therefore, this should remain permanently. */
e3b89505 RS	260	#ifndef HAVE_XRMSETDATABASE
	261	#define HAVE_XRMSETDATABASE
	262	#endif
e2000885	263
3743c30c RS	264	/* Use BSD process groups, but use setpgid() instead of setpgrp() to
	265	actually set a process group. */
	266
	267	#define BSD_PGRPS
e0a6ee5e	268
2327e4a0 GM	269	#define NARROWPROTO 1
2327e4a0 GM	270
e0a6ee5e RS	271	/* Use mmap directly for allocating larger buffers. */
	272	#ifdef DOUG_LEA_MALLOC
	273	#undef REL_ALLOC
	274	#endif
bb15bd9a DL	275
	276	/* Tell that garbage collector that setjmp is known to save all
	277	registers relevant for conservative garbage collection in the
	278	jmp_buf. */
e7b6b572 DL	279	/* Not all the architectures are tested, but there are Debian packages
	280	for SCM and/or Guile on them, so the technique must work. See also
	281	comments in alloc.c concerning setjmp and gcc. Fixme: it's
	282	probably safe to make this conditional just on GCC, except for ia64
	283	register window-flushing. */
a8f77aaa GM	284	/* Don't use #cpu here since in newest development versions of GCC,
	285	we must call cpp with -traditional, and that disables #cpu. */
	286
e7b6b572 DL	287	#if defined __i386__ \|\| defined __sparc__ \|\| defined __mc68000__ \
e7b6b572 DL	288	\|\| defined __alpha__ \|\| defined __mips__ \|\| defined __s390__ \
e3177e43 AS	289	\|\| defined __arm__ \|\| defined __powerpc__ \|\| defined __amd64__ \
e3177e43 AS	290	\|\| defined __ia64__
bb15bd9a	291	#define GC_SETJMP_WORKS 1
ecf4d726	292	#define GC_MARK_STACK GC_MAKE_GCPROS_NOOPS
72bba9f2 AS	293	#ifdef __mc68000__
	294	#define GC_LISP_OBJECT_ALIGNMENT 2
	295	#endif
e3177e43 AS	296	#ifdef __ia64__
	297	#define GC_MARK_SECONDARY_STACK() \
	298	do { \
	299	extern void *__libc_ia64_register_backing_store_base; \
	300	__builtin_ia64_flushrs (); \
	301	mark_memory (__libc_ia64_register_backing_store_base, \
fbb7c02f	302	__builtin_ia64_bsp (), 0); \
e3177e43 AS	303	} while (0)
e3177e43 AS	304	#endif
bb15bd9a	305	#endif
ab5796a9 MB	306
	307	/* arch-tag: 6244ea2a-abd0-44ec-abec-ff3dcc9afea9
	308	(do not change this comment) */