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

/* This file is the configuration file for Linux-based GNU systems
   Copyright (C) 1985, 86, 92, 94, 96, 1999 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 2, 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; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

/* 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 UNIPLUS */
/* #define USG5 */
#define USG
/* #define BSD_SYSTEM */
#define 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. */

/* Check the version number of Linux--if it is at least 1.2.0,
   it is safe to use SIGIO.  */
#ifndef NOT_C_CODE
#ifdef emacs
#ifdef HAVE_LINUX_VERSION_H
#include <linux/version.h>

#if LINUX_VERSION_CODE > 0x10200
#define LINUX_SIGIO_DOES_WORK
#endif /* LINUX_VERSION_CODE > 0x10200 */
#if LINUX_VERSION_CODE >= 0x20000
#define LINUX_MAP_SHARED_DOES_WORK
#endif /* LINUX_VERSION_CODE >= 0x20000 */
#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_GRANDPT */

/* 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

/* Uncomment this later when other problems are dealt with -mkj */

#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. */

#define MAIL_USE_FLOCK

/* 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`

#ifndef __ELF__
/* GNU/Linux usually has crt0.o in a non-standard place */
#define START_FILES pre-crt0.o /usr/lib/crt0.o
#else
#define START_FILES pre-crt0.o /usr/lib/crt1.o /usr/lib/crti.o
#endif

#ifdef __ELF__
/* 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__ */
#endif /* __ELF__ */

/* As of version 1.1.51, Linux did not actually implement SIGIO.
   But it works in newer versions.  */
#ifdef emacs
#ifdef LINUX_SIGIO_DOES_WORK
#define INTERRUPT_INPUT
#else
#define BROKEN_SIGIO
/* Some versions of Linux define SIGURG and SIGPOLL as aliases for SIGIO.
   This prevents lossage in process.c.  */
#define BROKEN_SIGURG
#define BROKEN_SIGPOLL
#endif
#endif

/* This is needed for sysdep.c */

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

#define HAVE_WAIT_HEADER

#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
#ifndef __ELF__
#define LIB_STANDARD -lc /* avoid -lPW */
#else
#undef LIB_GCC
#define LIB_GCC
#define LIB_STANDARD -lgcc -lc -lgcc /usr/lib/crtn.o
#endif

/* 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

/* Let's try this out, just in case.
   Nah.  Rik Faith <faith@cs.unc.edu> says it doesn't work well.  */
/* #define SIGNALS_VIA_CHARACTERS */

/* 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
#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

#ifdef __ELF__
#define UNEXEC unexelf.o
#ifndef LINUX_MAP_SHARED_DOES_WORK
#define UNEXEC_USE_MAP_PRIVATE
#endif
#endif

#ifdef LINUX_QMAGIC

#define HAVE_TEXT_START
#define UNEXEC unexsunos4.o
#define N_PAGSIZ(x) PAGE_SIZE

#else /* not LINUX_QMAGIC */

#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)

#endif /* not LINUX_QMAGIC */

#if 0
/* In 19.23 and 19.24, configure sometimes fails to define these.
   It has to do with the fact that configure uses CFLAGS when linking
   while Makefile.in.in (erroneously) fails to do so when linking temacs.  */
#ifndef HAVE_GETTIMEOFDAY
#define HAVE_GETTIMEOFDAY
#endif
#ifndef HAVE_MKDIR
#define HAVE_MKDIR
#endif
#ifndef HAVE_RMDIR
#define HAVE_RMDIR
#endif
#ifndef HAVE_XSCREENNUMBEROFSCREEN
#define HAVE_XSCREENNUMBEROFSCREEN
#endif
#endif /* 0 */

/* 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

/* The regex.o routines are a part of the GNU C-library used with Linux.  */
/* However, sometimes they disagree with the src/regex.h that comes with Emacs,
   and that can make trouble in etags.c because it gets the regex.h from Emacs
   and the function definitions in libc.  So turn this off.  */
/* #define REGEXP_IN_LIBC */

/* 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.  */
/* m68k and alpha aren't tested, but there are Debian packages for SCM
   and/or Guile on them, so the technique must work.  */
#if #cpu (i386) || #cpu (sparc) || #cpu (m68k) || #cpu (alpha)
#define GC_SETJMP_WORKS 1
#endif
Commit	Line	Data
3a707ba5	1	/* This file is the configuration file for Linux-based GNU systems
bb7b4368	2	Copyright (C) 1985, 86, 92, 94, 96, 1999 Free Software Foundation, Inc.
566e3587 JB	3
	4	This file is part of GNU Emacs.
	5
	6	GNU Emacs is free software; you can redistribute it and/or modify
	7	it under the terms of the GNU General Public License as published by
	8	the Free Software Foundation; either version 2, or (at your option)
	9	any later version.
	10
	11	GNU Emacs is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
	15
	16	You should have received a copy of the GNU General Public License
	17	along with GNU Emacs; see the file COPYING. If not, write to
3b7ad313 EN	18	the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
3b7ad313 EN	19	Boston, MA 02111-1307, USA. */
566e3587	20
b49ef455 JB	21	/* This file was put together by Michael K. Johnson and Rik Faith. */
b49ef455 JB	22
566e3587 JB	23
	24	/*
	25	* Define symbols to identify the version of Unix this is.
	26	* Define all the symbols that apply correctly.
	27	*/
	28
	29	/* #define UNIPLUS */
	30	/* #define USG5 */
	31	#define USG
8e4c450d	32	/* #define BSD_SYSTEM */
566e3587 JB	33	#define LINUX
	34
	35	/* SYSTEM_TYPE should indicate the kind of system you are using.
	36	It sets the Lisp variable system-type. */
	37
3a707ba5	38	#define SYSTEM_TYPE "gnu/linux" /* All the best software is free. */
566e3587	39
65953053 RS	40	/* Check the version number of Linux--if it is at least 1.2.0,
	41	it is safe to use SIGIO. */
	42	#ifndef NOT_C_CODE
	43	#ifdef emacs
b764619d	44	#ifdef HAVE_LINUX_VERSION_H
65953053	45	#include <linux/version.h>
566e3587	46
65953053 RS	47	#if LINUX_VERSION_CODE > 0x10200
65953053 RS	48	#define LINUX_SIGIO_DOES_WORK
aa7fcbb0	49	#endif /* LINUX_VERSION_CODE > 0x10200 */
2e38d862 AS	50	#if LINUX_VERSION_CODE >= 0x20000
	51	#define LINUX_MAP_SHARED_DOES_WORK
	52	#endif /* LINUX_VERSION_CODE >= 0x20000 */
b764619d	53	#endif /* HAVE_LINUX_VERSION_H */
aa7fcbb0 RS	54	#endif /* emacs */
aa7fcbb0 RS	55	#endif /* NOT_C_CODE */
566e3587	56
71125fb8 GM	57	#if defined HAVE_GRANTPT
71125fb8 GM	58	#define UNIX98_PTYS
566e3587	59
71125fb8 GM	60	/* Run only once. We need a `for'-loop because the code uses
71125fb8 GM	61	`continue'. */
566e3587	62
71125fb8	63	#define PTY_ITERATION for (i = 0; i < 1; i++)
fdc5e0fc	64
71125fb8 GM	65	#ifdef HAVE_GETPT
	66	#define PTY_NAME_SPRINTF
	67	#define PTY_OPEN fd = getpt ()
	68	#else /* not HAVE_GETPT */
	69	#define PTY_NAME_SPRINTF strcpy (pty_name, "/dev/ptmx");
	70	#endif /* not HAVE_GETPT */
	71
	72	/* Note that grantpt and unlockpt may fork. We must block SIGCHLD to
	73	prevent sigchld_handler from intercepting the child's death. */
	74
	75	#define PTY_TTY_NAME_SPRINTF \
	76	{ \
	77	char *ptyname; \
	78	\
	79	sigblock (sigmask (SIGCHLD)); \
	80	if (grantpt (fd) == -1 \|\| unlockpt (fd) == -1 \
	81	\|\| !(ptyname = ptsname(fd))) \
	82	{ \
	83	sigunblock (sigmask (SIGCHLD)); \
	84	close (fd); \
	85	return -1; \
	86	} \
	87	strncpy (pty_name, ptyname, sizeof (pty_name)); \
	88	pty_name[sizeof (pty_name) - 1] = 0; \
	89	sigunblock (sigmask (SIGCHLD)); \
	90	}
fdc5e0fc	91
71125fb8	92	#else /* not HAVE_GRANDPT */
fdc5e0fc	93
71125fb8 GM	94	/* Letter to use in finding device name of first pty,
71125fb8 GM	95	if system supports pty's. 'p' means it is /dev/ptyp0 */
fdc5e0fc	96
71125fb8	97	#define FIRST_PTY_LETTER 'p'
fdc5e0fc	98
71125fb8	99	#endif /* not HAVE_GRANDPT */
fdc5e0fc	100
71125fb8 GM	101	/* Define HAVE_TERMIOS if the system provides POSIX-style
71125fb8 GM	102	functions and macros for terminal control. */
566e3587 JB	103
	104	#define HAVE_TERMIOS
	105
71125fb8	106	/* Define HAVE_PTYS if the system supports pty devices. */
566e3587 JB	107
	108	#define HAVE_PTYS
	109
	110	/* Uncomment this later when other problems are dealt with -mkj */
	111
dad29761	112	#define HAVE_SOCKETS
566e3587 JB	113
	114	/* Define this symbol if your system has the functions bcopy, etc. */
	115
	116	#define BSTRING
	117
	118	/* subprocesses should be defined if you want to
	119	have code for asynchronous subprocesses
	120	(as used in M-x compile and M-x shell).
	121	This is generally OS dependent, and not supported
	122	under most USG systems. */
	123
	124	#define subprocesses
	125
	126	/* define MAIL_USE_FLOCK if the mailer uses flock
	127	to interlock access to /usr/spool/mail/$USER.
	128	The alternative is that a lock file named
	129	/usr/spool/mail/$USER.lock. */
	130
3a707ba5 RS	131	/* On GNU/Linux systems, both methods are used by various mail
	132	programs. I assume that most people are using newer mailers that
	133	have heard of flock. Change this if you need to. */
566e3587 JB	134
	135	#define MAIL_USE_FLOCK
	136
	137	/* Define CLASH_DETECTION if you want lock files to be written
	138	so that Emacs can tell instantly when you try to modify
	139	a file that someone else has modified in his Emacs. */
	140
b2e209ba	141	#define CLASH_DETECTION
566e3587 JB	142
	143	/* Here, on a separate page, add any special hacks needed
	144	to make Emacs work on this system. For example,
	145	you might define certain system call names that don't
	146	exist on your system, or that do different things on
	147	your system and must be used only through an encapsulation
	148	(Which you should place, by convention, in sysdep.c). */
	149	\f
566e3587 JB	150	/* If you mount the proc file system somewhere other than /proc
	151	you will have to uncomment the following and make the proper
	152	changes */
	153
	154	/* #define LINUX_LDAV_FILE "/proc/loadavg" */
	155
fde448f4	156	/* This is needed for dispnew.c:update_frame */
566e3587	157
5e5623c2	158	#ifdef emacs
a9c82aaf	159	#include <stdio.h> /* Get the definition of _IO_STDIO_H. */
4dee6d0d	160	#if defined(_IO_STDIO_H) \|\| defined(_STDIO_USES_IOSTREAM)
5e5623c2	161	/* new C libio names */
c2c3f859	162	#define GNU_LIBRARY_PENDING_OUTPUT_COUNT(FILE) \
5e5623c2 RS	163	((FILE)->_IO_write_ptr - (FILE)->_IO_write_base)
	164	#else /* !_IO_STDIO_H */
	165	/* old C++ iostream names */
c2c3f859	166	#define GNU_LIBRARY_PENDING_OUTPUT_COUNT(FILE) \
5e5623c2 RS	167	((FILE)->_pptr - (FILE)->_pbase)
	168	#endif /* !_IO_STDIO_H */
	169	#endif /* emacs */
566e3587	170
5101db23	171	/* Ask GCC where to find libgcc.a. */
08ddf771	172	#define LIB_GCC `$(CC) $(C_SWITCH_X_SITE) -print-libgcc-file-name`
5101db23	173
4dee6d0d	174	#ifndef __ELF__
3a707ba5	175	/* GNU/Linux usually has crt0.o in a non-standard place */
566e3587	176	#define START_FILES pre-crt0.o /usr/lib/crt0.o
4dee6d0d	177	#else
01b79236	178	#define START_FILES pre-crt0.o /usr/lib/crt1.o /usr/lib/crti.o
4dee6d0d	179	#endif
566e3587	180
588a9a3e RS	181	#ifdef __ELF__
	182	/* Here is how to find X Windows. LD_SWITCH_X_SITE_AUX gives an -R option
	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__ */
588a9a3e RS	190	#endif /* __ELF__ */
588a9a3e RS	191
3a707ba5 RS	192	/* As of version 1.1.51, Linux did not actually implement SIGIO.
3a707ba5 RS	193	But it works in newer versions. */
566e3587	194	#ifdef emacs
65953053 RS	195	#ifdef LINUX_SIGIO_DOES_WORK
	196	#define INTERRUPT_INPUT
	197	#else
bb7b4368	198	#define BROKEN_SIGIO
0f2256ef RS	199	/* Some versions of Linux define SIGURG and SIGPOLL as aliases for SIGIO.
0f2256ef RS	200	This prevents lossage in process.c. */
bb7b4368 PE	201	#define BROKEN_SIGURG
bb7b4368 PE	202	#define BROKEN_SIGPOLL
566e3587	203	#endif
65953053	204	#endif
566e3587 JB	205
	206	/* This is needed for sysdep.c */
	207
566e3587 JB	208	#define NO_SIOCTL_H /* don't have sioctl.h */
566e3587 JB	209
813319d0	210	#define HAVE_WAIT_HEADER
566e3587	211
566e3587	212	#define SYSV_SYSTEM_DIR /* use dirent.h */
566e3587	213
1abbab7a	214	#define POSIX /* affects getpagesize.h and systty.h */
566e3587 JB	215	#define POSIX_SIGNALS
566e3587 JB	216
566e3587 JB	217	/* Best not to include -lg, unless it is last on the command line */
566e3587 JB	218	#define LIBS_DEBUG
4dee6d0d	219	#ifndef __ELF__
566e3587	220	#define LIB_STANDARD -lc /* avoid -lPW */
4dee6d0d	221	#else
08ddf771	222	#undef LIB_GCC
4dee6d0d	223	#define LIB_GCC
01b79236	224	#define LIB_STANDARD -lgcc -lc -lgcc /usr/lib/crtn.o
4dee6d0d	225	#endif
3233bbe1	226
6f10bc9d RS	227	/* Don't use -g in test compiles in configure.
	228	This is so we will use the same shared libs for that linking
	229	that are used when linking temacs. */
	230	#ifdef THIS_IS_CONFIGURE
	231	#define C_DEBUG_SWITCH
	232	#endif
	233
9e479734 JB	234	/* Let's try this out, just in case.
	235	Nah. Rik Faith <faith@cs.unc.edu> says it doesn't work well. */
	236	/* #define SIGNALS_VIA_CHARACTERS */
9199fa7f JB	237
	238	/* Rob Malouf <malouf@csli.stanford.edu> says:
	239	SYSV IPC is standard a standard part of Linux since version 0.99pl10,
	240	and is a very common addition to previous versions. */
cafdb68a RS	241
cafdb68a RS	242	#ifdef TERM
1077bc04	243	#define LIBS_SYSTEM -lclient
cafdb68a RS	244	#define C_SWITCH_SYSTEM -D_BSD_SOURCE -I/usr/src/term
cafdb68a RS	245	#else
edb0cf8d RS	246	/* alane@wozzle.linet.org says that -lipc is not a separate library,
edb0cf8d RS	247	since libc-4.4.1. So -lipc was deleted. */
1077bc04	248	#define LIBS_SYSTEM
f83a1ae3	249	#define C_SWITCH_SYSTEM -D_BSD_SOURCE
cafdb68a RS	250	#endif
cafdb68a RS	251
c7ce28ce RS	252	/* Paul Abrahams <abrahams@equinox.shaysnet.com> says this is needed. */
	253	#define LIB_MOTIF -lXm -lXpm
	254
be1d1a1a	255	#ifdef HAVE_LIBNCURSES
65953053	256	#define TERMINFO
565b8b0d	257	#define LIBS_TERMCAP -lncurses
65953053 RS	258	#endif
65953053 RS	259
9199fa7f	260	#define HAVE_SYSVIPC
b04101bb	261
4dee6d0d KH	262	#ifdef __ELF__
4dee6d0d KH	263	#define UNEXEC unexelf.o
2e38d862	264	#ifndef LINUX_MAP_SHARED_DOES_WORK
baea3bdd	265	#define UNEXEC_USE_MAP_PRIVATE
4dee6d0d	266	#endif
2e38d862	267	#endif
4dee6d0d	268
8427dec9 RS	269	#ifdef LINUX_QMAGIC
	270
	271	#define HAVE_TEXT_START
	272	#define UNEXEC unexsunos4.o
	273	#define N_PAGSIZ(x) PAGE_SIZE
	274
	275	#else /* not LINUX_QMAGIC */
	276
b04101bb RS	277	#define A_TEXT_OFFSET(hdr) (N_MAGIC(hdr) == QMAGIC ? sizeof (struct exec) : 0)
	278	#define A_TEXT_SEEK(hdr) (N_TXTOFF(hdr) + A_TEXT_OFFSET(hdr))
	279	#define ADJUST_EXEC_HEADER \
	280	unexec_text_start = N_TXTADDR(ohdr) + A_TEXT_OFFSET(ohdr)
967ac200	281
8427dec9 RS	282	#endif /* not LINUX_QMAGIC */
8427dec9 RS	283
6f10bc9d	284	#if 0
967ac200 RS	285	/* In 19.23 and 19.24, configure sometimes fails to define these.
	286	It has to do with the fact that configure uses CFLAGS when linking
	287	while Makefile.in.in (erroneously) fails to do so when linking temacs. */
	288	#ifndef HAVE_GETTIMEOFDAY
	289	#define HAVE_GETTIMEOFDAY
	290	#endif
	291	#ifndef HAVE_MKDIR
	292	#define HAVE_MKDIR
	293	#endif
	294	#ifndef HAVE_RMDIR
	295	#define HAVE_RMDIR
	296	#endif
	297	#ifndef HAVE_XSCREENNUMBEROFSCREEN
	298	#define HAVE_XSCREENNUMBEROFSCREEN
	299	#endif
639f52d8 RS	300	#endif /* 0 */
	301
	302	/* This is to work around mysterious gcc failures in some system versions.
	303	It is unlikely that Emacs changes will work around this problem;
	304	therefore, this should remain permanently. */
e3b89505 RS	305	#ifndef HAVE_XRMSETDATABASE
	306	#define HAVE_XRMSETDATABASE
	307	#endif
e2000885 RS	308
e2000885 RS	309	/* The regex.o routines are a part of the GNU C-library used with Linux. */
ea18e284 RS	310	/* However, sometimes they disagree with the src/regex.h that comes with Emacs,
	311	and that can make trouble in etags.c because it gets the regex.h from Emacs
	312	and the function definitions in libc. So turn this off. */
	313	/* #define REGEXP_IN_LIBC */
	314
3743c30c RS	315	/* Use BSD process groups, but use setpgid() instead of setpgrp() to
	316	actually set a process group. */
	317
	318	#define BSD_PGRPS
e0a6ee5e	319
2327e4a0 GM	320	#define NARROWPROTO 1
2327e4a0 GM	321
e0a6ee5e RS	322	/* Use mmap directly for allocating larger buffers. */
	323	#ifdef DOUG_LEA_MALLOC
	324	#undef REL_ALLOC
	325	#endif
bb15bd9a DL	326
	327	/* Tell that garbage collector that setjmp is known to save all
	328	registers relevant for conservative garbage collection in the
	329	jmp_buf. */
	330	/* m68k and alpha aren't tested, but there are Debian packages for SCM
	331	and/or Guile on them, so the technique must work. */
	332	#if #cpu (i386) \|\| #cpu (sparc) \|\| #cpu (m68k) \|\| #cpu (alpha)
	333	#define GC_SETJMP_WORKS 1
	334	#endif