[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, 2002, 2003, 2004,
                 2005, 2006 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., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, 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
#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. */

/* 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_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 */

#if !(defined (HAVE_LIBMAIL) && 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`

#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__ */

/* 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
#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
/* _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

#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.  */
/* 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 ());			\
  } 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
92b47a4a	2	Copyright (C) 1985, 1986, 1992, 1994, 1996, 1999, 2002, 2003, 2004,
aaef169d	3	2005, 2006 Free Software Foundation, Inc.
566e3587 JB	4
	5	This file is part of GNU Emacs.
	6
	7	GNU Emacs is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 2, or (at your option)
	10	any later version.
	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
	18	along with GNU Emacs; see the file COPYING. If not, write to
364c38d3 LK	19	the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
364c38d3 LK	20	Boston, MA 02110-1301, USA. */
566e3587	21
b49ef455 JB	22	/* This file was put together by Michael K. Johnson and Rik Faith. */
b49ef455 JB	23
566e3587 JB	24
	25	/*
	26	* Define symbols to identify the version of Unix this is.
	27	* Define all the symbols that apply correctly.
	28	*/
	29
	30	/* #define UNIPLUS */
	31	/* #define USG5 */
	32	#define USG
8e4c450d	33	/* #define BSD_SYSTEM */
566e3587	34	#define LINUX
8db5530a	35	#define GNU_LINUX
566e3587 JB	36
	37	/* SYSTEM_TYPE should indicate the kind of system you are using.
	38	It sets the Lisp variable system-type. */
	39
3a707ba5	40	#define SYSTEM_TYPE "gnu/linux" /* All the best software is free. */
566e3587	41
65953053 RS	42	/* Check the version number of Linux--if it is at least 1.2.0,
	43	it is safe to use SIGIO. */
	44	#ifndef NOT_C_CODE
	45	#ifdef emacs
b764619d	46	#ifdef HAVE_LINUX_VERSION_H
65953053	47	#include <linux/version.h>
566e3587	48
65953053 RS	49	#if LINUX_VERSION_CODE > 0x10200
65953053 RS	50	#define LINUX_SIGIO_DOES_WORK
aa7fcbb0	51	#endif /* LINUX_VERSION_CODE > 0x10200 */
2e38d862 AS	52	#if LINUX_VERSION_CODE >= 0x20000
	53	#define LINUX_MAP_SHARED_DOES_WORK
	54	#endif /* LINUX_VERSION_CODE >= 0x20000 */
b764619d	55	#endif /* HAVE_LINUX_VERSION_H */
aa7fcbb0 RS	56	#endif /* emacs */
aa7fcbb0 RS	57	#endif /* NOT_C_CODE */
566e3587	58
71125fb8 GM	59	#if defined HAVE_GRANTPT
71125fb8 GM	60	#define UNIX98_PTYS
566e3587	61
71125fb8 GM	62	/* Run only once. We need a `for'-loop because the code uses
71125fb8 GM	63	`continue'. */
566e3587	64
71125fb8	65	#define PTY_ITERATION for (i = 0; i < 1; i++)
fdc5e0fc	66
71125fb8 GM	67	#ifdef HAVE_GETPT
	68	#define PTY_NAME_SPRINTF
	69	#define PTY_OPEN fd = getpt ()
	70	#else /* not HAVE_GETPT */
	71	#define PTY_NAME_SPRINTF strcpy (pty_name, "/dev/ptmx");
	72	#endif /* not HAVE_GETPT */
	73
	74	/* Note that grantpt and unlockpt may fork. We must block SIGCHLD to
	75	prevent sigchld_handler from intercepting the child's death. */
	76
	77	#define PTY_TTY_NAME_SPRINTF \
	78	{ \
	79	char *ptyname; \
	80	\
	81	sigblock (sigmask (SIGCHLD)); \
	82	if (grantpt (fd) == -1 \|\| unlockpt (fd) == -1 \
	83	\|\| !(ptyname = ptsname(fd))) \
	84	{ \
	85	sigunblock (sigmask (SIGCHLD)); \
	86	close (fd); \
	87	return -1; \
	88	} \
	89	strncpy (pty_name, ptyname, sizeof (pty_name)); \
	90	pty_name[sizeof (pty_name) - 1] = 0; \
	91	sigunblock (sigmask (SIGCHLD)); \
	92	}
fdc5e0fc	93
dacbb818	94	#else /* not HAVE_GRANTPT */
fdc5e0fc	95
71125fb8 GM	96	/* Letter to use in finding device name of first pty,
71125fb8 GM	97	if system supports pty's. 'p' means it is /dev/ptyp0 */
fdc5e0fc	98
71125fb8	99	#define FIRST_PTY_LETTER 'p'
fdc5e0fc	100
71125fb8	101	#endif /* not HAVE_GRANDPT */
fdc5e0fc	102
71125fb8 GM	103	/* Define HAVE_TERMIOS if the system provides POSIX-style
71125fb8 GM	104	functions and macros for terminal control. */
566e3587 JB	105
	106	#define HAVE_TERMIOS
	107
71125fb8	108	/* Define HAVE_PTYS if the system supports pty devices. */
566e3587 JB	109
	110	#define HAVE_PTYS
	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. */
828a3791 DL	134	/* Debian contains a patch which says: ``On Debian/GNU/Linux systems,
	135	configure gets the right answers, and that means NOT using flock.
	136	Using flock is guaranteed to be the wrong thing. See Debian Policy
	137	for details.'' and then uses `#ifdef DEBIAN'. Unfortunately the
	138	Debian maintainer hasn't provided a clean fix for Emacs.
	139	movemail.c will use `maillock' when MAILDIR, HAVE_LIBMAIL and
	140	HAVE_MAILLOCK_H are defined, so the following appears to be the
	141	correct logic. -- fx */
	142
	143	#if !(defined (HAVE_LIBMAIL) && defined (HAVE_MAILLOCK_H))
566e3587	144	#define MAIL_USE_FLOCK
828a3791	145	#endif
566e3587 JB	146
	147	/* Define CLASH_DETECTION if you want lock files to be written
	148	so that Emacs can tell instantly when you try to modify
	149	a file that someone else has modified in his Emacs. */
	150
b2e209ba	151	#define CLASH_DETECTION
566e3587 JB	152
	153	/* Here, on a separate page, add any special hacks needed
	154	to make Emacs work on this system. For example,
	155	you might define certain system call names that don't
	156	exist on your system, or that do different things on
	157	your system and must be used only through an encapsulation
	158	(Which you should place, by convention, in sysdep.c). */
	159	\f
566e3587 JB	160	/* If you mount the proc file system somewhere other than /proc
	161	you will have to uncomment the following and make the proper
	162	changes */
	163
	164	/* #define LINUX_LDAV_FILE "/proc/loadavg" */
	165
fde448f4	166	/* This is needed for dispnew.c:update_frame */
566e3587	167
5e5623c2	168	#ifdef emacs
a9c82aaf	169	#include <stdio.h> /* Get the definition of _IO_STDIO_H. */
4dee6d0d	170	#if defined(_IO_STDIO_H) \|\| defined(_STDIO_USES_IOSTREAM)
5e5623c2	171	/* new C libio names */
c2c3f859	172	#define GNU_LIBRARY_PENDING_OUTPUT_COUNT(FILE) \
5e5623c2 RS	173	((FILE)->_IO_write_ptr - (FILE)->_IO_write_base)
	174	#else /* !_IO_STDIO_H */
	175	/* old C++ iostream names */
c2c3f859	176	#define GNU_LIBRARY_PENDING_OUTPUT_COUNT(FILE) \
5e5623c2 RS	177	((FILE)->_pptr - (FILE)->_pbase)
	178	#endif /* !_IO_STDIO_H */
	179	#endif /* emacs */
566e3587	180
5101db23	181	/* Ask GCC where to find libgcc.a. */
08ddf771	182	#define LIB_GCC `$(CC) $(C_SWITCH_X_SITE) -print-libgcc-file-name`
5101db23	183
4dee6d0d	184	#ifndef __ELF__
3a707ba5	185	/* GNU/Linux usually has crt0.o in a non-standard place */
566e3587	186	#define START_FILES pre-crt0.o /usr/lib/crt0.o
4dee6d0d	187	#else
01b79236	188	#define START_FILES pre-crt0.o /usr/lib/crt1.o /usr/lib/crti.o
4dee6d0d	189	#endif
566e3587	190
588a9a3e RS	191	#ifdef __ELF__
	192	/* Here is how to find X Windows. LD_SWITCH_X_SITE_AUX gives an -R option
	193	says where to find X windows at run time. */
a28c4a8e	194
f649aa04 RS	195	#ifdef __mips__
	196	#define LD_SWITCH_SYSTEM -G 0 LD_SWITCH_X_SITE_AUX
	197	#else
588a9a3e	198	#define LD_SWITCH_SYSTEM LD_SWITCH_X_SITE_AUX
f649aa04	199	#endif /* __mips__ */
854ad2d5 AS	200
854ad2d5 AS	201	/* Link temacs with -z nocombreloc so that unexec works right, whether or
75bec752	202	not -z combreloc is the default. GNU ld ignores unknown -z KEYWORD
854ad2d5 AS	203	switches, so this also works with older versions that don't implement
	204	-z combreloc. */
	205	#define LD_SWITCH_SYSTEM_TEMACS -z nocombreloc
588a9a3e RS	206	#endif /* __ELF__ */
588a9a3e RS	207
3a707ba5 RS	208	/* As of version 1.1.51, Linux did not actually implement SIGIO.
3a707ba5 RS	209	But it works in newer versions. */
566e3587	210	#ifdef emacs
65953053 RS	211	#ifdef LINUX_SIGIO_DOES_WORK
	212	#define INTERRUPT_INPUT
	213	#else
bb7b4368	214	#define BROKEN_SIGIO
0f2256ef RS	215	/* Some versions of Linux define SIGURG and SIGPOLL as aliases for SIGIO.
0f2256ef RS	216	This prevents lossage in process.c. */
bb7b4368 PE	217	#define BROKEN_SIGURG
bb7b4368 PE	218	#define BROKEN_SIGPOLL
566e3587	219	#endif
65953053	220	#endif
566e3587 JB	221
	222	/* This is needed for sysdep.c */
	223
566e3587 JB	224	#define NO_SIOCTL_H /* don't have sioctl.h */
566e3587 JB	225
813319d0	226	#define HAVE_WAIT_HEADER
566e3587	227
566e3587	228	#define SYSV_SYSTEM_DIR /* use dirent.h */
566e3587	229
1abbab7a	230	#define POSIX /* affects getpagesize.h and systty.h */
566e3587 JB	231	#define POSIX_SIGNALS
566e3587 JB	232
566e3587 JB	233	/* Best not to include -lg, unless it is last on the command line */
566e3587 JB	234	#define LIBS_DEBUG
4dee6d0d	235	#ifndef __ELF__
566e3587	236	#define LIB_STANDARD -lc /* avoid -lPW */
4dee6d0d	237	#else
08ddf771	238	#undef LIB_GCC
4dee6d0d	239	#define LIB_GCC
01b79236	240	#define LIB_STANDARD -lgcc -lc -lgcc /usr/lib/crtn.o
4dee6d0d	241	#endif
3233bbe1	242
6f10bc9d RS	243	/* Don't use -g in test compiles in configure.
	244	This is so we will use the same shared libs for that linking
	245	that are used when linking temacs. */
	246	#ifdef THIS_IS_CONFIGURE
	247	#define C_DEBUG_SWITCH
	248	#endif
	249
9e479734 JB	250	/* Let's try this out, just in case.
	251	Nah. Rik Faith <faith@cs.unc.edu> says it doesn't work well. */
	252	/* #define SIGNALS_VIA_CHARACTERS */
9199fa7f JB	253
	254	/* Rob Malouf <malouf@csli.stanford.edu> says:
	255	SYSV IPC is standard a standard part of Linux since version 0.99pl10,
	256	and is a very common addition to previous versions. */
cafdb68a RS	257
cafdb68a RS	258	#ifdef TERM
1077bc04	259	#define LIBS_SYSTEM -lclient
cafdb68a RS	260	#define C_SWITCH_SYSTEM -D_BSD_SOURCE -I/usr/src/term
cafdb68a RS	261	#else
edb0cf8d RS	262	/* alane@wozzle.linet.org says that -lipc is not a separate library,
edb0cf8d RS	263	since libc-4.4.1. So -lipc was deleted. */
1077bc04	264	#define LIBS_SYSTEM
e7b6b572 DL	265	/* _BSD_SOURCE is redundant, at least in glibc2, since we define
	266	_GNU_SOURCE. Left in in case it's relevant to libc5 systems and
	267	anyone's still using Emacs on those. --fx 2002-12-14 */
f83a1ae3	268	#define C_SWITCH_SYSTEM -D_BSD_SOURCE
cafdb68a RS	269	#endif
cafdb68a RS	270
c7ce28ce RS	271	/* Paul Abrahams <abrahams@equinox.shaysnet.com> says this is needed. */
	272	#define LIB_MOTIF -lXm -lXpm
	273
be1d1a1a	274	#ifdef HAVE_LIBNCURSES
65953053	275	#define TERMINFO
565b8b0d	276	#define LIBS_TERMCAP -lncurses
65953053 RS	277	#endif
65953053 RS	278
9199fa7f	279	#define HAVE_SYSVIPC
b04101bb	280
4dee6d0d KH	281	#ifdef __ELF__
4dee6d0d KH	282	#define UNEXEC unexelf.o
2e38d862	283	#ifndef LINUX_MAP_SHARED_DOES_WORK
baea3bdd	284	#define UNEXEC_USE_MAP_PRIVATE
4dee6d0d	285	#endif
2e38d862	286	#endif
4dee6d0d	287
8427dec9 RS	288	#ifdef LINUX_QMAGIC
	289
	290	#define HAVE_TEXT_START
	291	#define UNEXEC unexsunos4.o
	292	#define N_PAGSIZ(x) PAGE_SIZE
	293
	294	#else /* not LINUX_QMAGIC */
	295
b04101bb RS	296	#define A_TEXT_OFFSET(hdr) (N_MAGIC(hdr) == QMAGIC ? sizeof (struct exec) : 0)
	297	#define A_TEXT_SEEK(hdr) (N_TXTOFF(hdr) + A_TEXT_OFFSET(hdr))
	298	#define ADJUST_EXEC_HEADER \
	299	unexec_text_start = N_TXTADDR(ohdr) + A_TEXT_OFFSET(ohdr)
967ac200	300
8427dec9 RS	301	#endif /* not LINUX_QMAGIC */
8427dec9 RS	302
6f10bc9d	303	#if 0
967ac200 RS	304	/* In 19.23 and 19.24, configure sometimes fails to define these.
	305	It has to do with the fact that configure uses CFLAGS when linking
	306	while Makefile.in.in (erroneously) fails to do so when linking temacs. */
	307	#ifndef HAVE_GETTIMEOFDAY
	308	#define HAVE_GETTIMEOFDAY
	309	#endif
	310	#ifndef HAVE_MKDIR
	311	#define HAVE_MKDIR
	312	#endif
	313	#ifndef HAVE_RMDIR
	314	#define HAVE_RMDIR
	315	#endif
	316	#ifndef HAVE_XSCREENNUMBEROFSCREEN
	317	#define HAVE_XSCREENNUMBEROFSCREEN
	318	#endif
639f52d8 RS	319	#endif /* 0 */
	320
	321	/* This is to work around mysterious gcc failures in some system versions.
	322	It is unlikely that Emacs changes will work around this problem;
	323	therefore, this should remain permanently. */
e3b89505 RS	324	#ifndef HAVE_XRMSETDATABASE
	325	#define HAVE_XRMSETDATABASE
	326	#endif
e2000885 RS	327
e2000885 RS	328	/* The regex.o routines are a part of the GNU C-library used with Linux. */
ea18e284 RS	329	/* However, sometimes they disagree with the src/regex.h that comes with Emacs,
	330	and that can make trouble in etags.c because it gets the regex.h from Emacs
	331	and the function definitions in libc. So turn this off. */
	332	/* #define REGEXP_IN_LIBC */
	333
3743c30c RS	334	/* Use BSD process groups, but use setpgid() instead of setpgrp() to
	335	actually set a process group. */
	336
	337	#define BSD_PGRPS
e0a6ee5e	338
2327e4a0 GM	339	#define NARROWPROTO 1
2327e4a0 GM	340
e0a6ee5e RS	341	/* Use mmap directly for allocating larger buffers. */
	342	#ifdef DOUG_LEA_MALLOC
	343	#undef REL_ALLOC
	344	#endif
bb15bd9a DL	345
	346	/* Tell that garbage collector that setjmp is known to save all
	347	registers relevant for conservative garbage collection in the
	348	jmp_buf. */
e7b6b572 DL	349	/* Not all the architectures are tested, but there are Debian packages
	350	for SCM and/or Guile on them, so the technique must work. See also
	351	comments in alloc.c concerning setjmp and gcc. Fixme: it's
	352	probably safe to make this conditional just on GCC, except for ia64
	353	register window-flushing. */
a8f77aaa GM	354	/* Don't use #cpu here since in newest development versions of GCC,
	355	we must call cpp with -traditional, and that disables #cpu. */
	356
e7b6b572 DL	357	#if defined __i386__ \|\| defined __sparc__ \|\| defined __mc68000__ \
e7b6b572 DL	358	\|\| defined __alpha__ \|\| defined __mips__ \|\| defined __s390__ \
e3177e43 AS	359	\|\| defined __arm__ \|\| defined __powerpc__ \|\| defined __amd64__ \
e3177e43 AS	360	\|\| defined __ia64__
bb15bd9a	361	#define GC_SETJMP_WORKS 1
ecf4d726	362	#define GC_MARK_STACK GC_MAKE_GCPROS_NOOPS
72bba9f2 AS	363	#ifdef __mc68000__
	364	#define GC_LISP_OBJECT_ALIGNMENT 2
	365	#endif
e3177e43 AS	366	#ifdef __ia64__
	367	#define GC_MARK_SECONDARY_STACK() \
	368	do { \
	369	extern void *__libc_ia64_register_backing_store_base; \
	370	__builtin_ia64_flushrs (); \
	371	mark_memory (__libc_ia64_register_backing_store_base, \
	372	__builtin_ia64_bsp ()); \
	373	} while (0)
	374	#endif
bb15bd9a	375	#endif
ab5796a9 MB	376
	377	/* arch-tag: 6244ea2a-abd0-44ec-abec-ff3dcc9afea9
	378	(do not change this comment) */