1/* This file is the configuration file for Linux-based GNU systems 2 Copyright (C) 1985, 1986, 1992, 1994, 1996, 1999, 2001, 2002, 2003, 2004, 3 2005, 2006, 2007 Free Software Foundation, Inc. 4 5This file is part of GNU Emacs. 6 7GNU Emacs is free software; you can redistribute it and/or modify 8it under the terms of the GNU General Public License as published by 9the Free Software Foundation; either version 2, or (at your option) 10any later version. 11 12GNU Emacs is distributed in the hope that it will be useful, 13but WITHOUT ANY WARRANTY; without even the implied warranty of 14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15GNU General Public License for more details. 16 17You should have received a copy of the GNU General Public License 18along with GNU Emacs; see the file COPYING. If not, write to 19the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 20Boston, MA 02110-1301, USA. */ 21 22/* This file was put together by Michael K. Johnson and Rik Faith. */ 23 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 33/* #define BSD_SYSTEM */ 34#define LINUX 35#define GNU_LINUX 36 37/* SYSTEM_TYPE should indicate the kind of system you are using. 38 It sets the Lisp variable system-type. */ 39 40#define SYSTEM_TYPE "gnu/linux" /* All the best software is free. */ 41 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 46#ifdef HAVE_LINUX_VERSION_H 47#include <linux/version.h> 48 49#if LINUX_VERSION_CODE > 0x10200 50#define LINUX_SIGIO_DOES_WORK 51#endif /* LINUX_VERSION_CODE > 0x10200 */ 52#if LINUX_VERSION_CODE >= 0x20000 53#define LINUX_MAP_SHARED_DOES_WORK 54#endif /* LINUX_VERSION_CODE >= 0x20000 */ 55#if LINUX_VERSION_CODE >= 0x20400 56#define LINUX_SIGNALS_VIA_CHARACTERS_DOES_WORK 57#endif /* LINUX_VERSION_CODE >= 0x20400 */ 58#endif /* HAVE_LINUX_VERSION_H */ 59#endif /* emacs */ 60#endif /* NOT_C_CODE */ 61 62#if defined HAVE_GRANTPT 63#define UNIX98_PTYS 64 65/* Run only once. We need a `for'-loop because the code uses 66 `continue'. */ 67 68#define PTY_ITERATION for (i = 0; i < 1; i++) 69 70#ifdef HAVE_GETPT 71#define PTY_NAME_SPRINTF 72#define PTY_OPEN fd = getpt () 73#else /* not HAVE_GETPT */ 74#define PTY_NAME_SPRINTF strcpy (pty_name, "/dev/ptmx"); 75#endif /* not HAVE_GETPT */ 76 77/* Note that grantpt and unlockpt may fork. We must block SIGCHLD to 78 prevent sigchld_handler from intercepting the child's death. */ 79 80#define PTY_TTY_NAME_SPRINTF \ 81 { \ 82 char *ptyname; \ 83 \ 84 sigblock (sigmask (SIGCHLD)); \ 85 if (grantpt (fd) == -1 || unlockpt (fd) == -1 \ 86 || !(ptyname = ptsname(fd))) \ 87 { \ 88 sigunblock (sigmask (SIGCHLD)); \ 89 close (fd); \ 90 return -1; \ 91 } \ 92 strncpy (pty_name, ptyname, sizeof (pty_name)); \ 93 pty_name[sizeof (pty_name) - 1] = 0; \ 94 sigunblock (sigmask (SIGCHLD)); \ 95 } 96 97#else /* not HAVE_GRANTPT */ 98 99/* Letter to use in finding device name of first pty, 100 if system supports pty's. 'p' means it is /dev/ptyp0 */ 101 102#define FIRST_PTY_LETTER 'p' 103 104#endif /* not HAVE_GRANDPT */ 105 106/* Define HAVE_TERMIOS if the system provides POSIX-style 107 functions and macros for terminal control. */ 108 109#define HAVE_TERMIOS 110 111/* Define HAVE_PTYS if the system supports pty devices. */ 112 113#define HAVE_PTYS 114 115#define HAVE_SOCKETS 116 117/* Define this symbol if your system has the functions bcopy, etc. */ 118 119#define BSTRING 120 121/* subprocesses should be defined if you want to 122 have code for asynchronous subprocesses 123 (as used in M-x compile and M-x shell). 124 This is generally OS dependent, and not supported 125 under most USG systems. */ 126 127#define subprocesses 128 129/* define MAIL_USE_FLOCK if the mailer uses flock 130 to interlock access to /usr/spool/mail/$USER. 131 The alternative is that a lock file named 132 /usr/spool/mail/$USER.lock. */ 133 134/* On GNU/Linux systems, both methods are used by various mail 135 programs. I assume that most people are using newer mailers that 136 have heard of flock. Change this if you need to. */ 137/* Debian contains a patch which says: ``On Debian/GNU/Linux systems, 138 configure gets the right answers, and that means *NOT* using flock. 139 Using flock is guaranteed to be the wrong thing. See Debian Policy 140 for details.'' and then uses `#ifdef DEBIAN'. Unfortunately the 141 Debian maintainer hasn't provided a clean fix for Emacs. 142 movemail.c will use `maillock' when MAILDIR, HAVE_LIBMAIL and 143 HAVE_MAILLOCK_H are defined, so the following appears to be the 144 correct logic. -- fx */ 145/* We must check for HAVE_LIBLOCKFILE too, as movemail does. 146 liblockfile is a Free Software replacement for libmail, used on 147 Debian systems and elsewhere. -rfr */ 148 149#if !((defined (HAVE_LIBMAIL) || defined (HAVE_LIBLOCKFILE)) && \ 150 defined (HAVE_MAILLOCK_H)) 151#define MAIL_USE_FLOCK 152#endif 153 154/* Define CLASH_DETECTION if you want lock files to be written 155 so that Emacs can tell instantly when you try to modify 156 a file that someone else has modified in his Emacs. */ 157 158#define CLASH_DETECTION 159 160/* Here, on a separate page, add any special hacks needed 161 to make Emacs work on this system. For example, 162 you might define certain system call names that don't 163 exist on your system, or that do different things on 164 your system and must be used only through an encapsulation 165 (Which you should place, by convention, in sysdep.c). */ 166 167/* If you mount the proc file system somewhere other than /proc 168 you will have to uncomment the following and make the proper 169 changes */ 170 171/* #define LINUX_LDAV_FILE "/proc/loadavg" */ 172 173/* This is needed for dispnew.c:update_frame */ 174 175#ifdef emacs 176#include <stdio.h> /* Get the definition of _IO_STDIO_H. */ 177#if defined(_IO_STDIO_H) || defined(_STDIO_USES_IOSTREAM) 178/* new C libio names */ 179#define GNU_LIBRARY_PENDING_OUTPUT_COUNT(FILE) \ 180 ((FILE)->_IO_write_ptr - (FILE)->_IO_write_base) 181#else /* !_IO_STDIO_H */ 182/* old C++ iostream names */ 183#define GNU_LIBRARY_PENDING_OUTPUT_COUNT(FILE) \ 184 ((FILE)->_pptr - (FILE)->_pbase) 185#endif /* !_IO_STDIO_H */ 186#endif /* emacs */ 187 188/* Ask GCC where to find libgcc.a. */ 189#define LIB_GCC `$(CC) $(C_SWITCH_X_SITE) -print-libgcc-file-name` 190 191#ifndef __ELF__ 192/* GNU/Linux usually has crt0.o in a non-standard place */ 193#define START_FILES pre-crt0.o /usr/lib/crt0.o 194#else 195#define START_FILES pre-crt0.o /usr/lib/crt1.o /usr/lib/crti.o 196#endif 197 198#ifdef __ELF__ 199/* Here is how to find X Windows. LD_SWITCH_X_SITE_AUX gives an -R option 200 says where to find X windows at run time. */ 201 202#ifdef __mips__ 203#define LD_SWITCH_SYSTEM -G 0 LD_SWITCH_X_SITE_AUX 204#else 205#define LD_SWITCH_SYSTEM LD_SWITCH_X_SITE_AUX 206#endif /* __mips__ */ 207 208/* Link temacs with -z nocombreloc so that unexec works right, whether or 209 not -z combreloc is the default. GNU ld ignores unknown -z KEYWORD 210 switches, so this also works with older versions that don't implement 211 -z combreloc. */ 212#define LD_SWITCH_SYSTEM_TEMACS -z nocombreloc 213#endif /* __ELF__ */ 214 215/* As of version 1.1.51, Linux did not actually implement SIGIO. 216 But it works in newer versions. */ 217#ifdef emacs 218#ifdef LINUX_SIGIO_DOES_WORK 219#define INTERRUPT_INPUT 220#else 221#define BROKEN_SIGIO 222/* Some versions of Linux define SIGURG and SIGPOLL as aliases for SIGIO. 223 This prevents lossage in process.c. */ 224#define BROKEN_SIGURG 225#define BROKEN_SIGPOLL 226#endif 227#endif 228 229/* This is needed for sysdep.c */ 230 231#define NO_SIOCTL_H /* don't have sioctl.h */ 232 233#define HAVE_WAIT_HEADER 234 235#define SYSV_SYSTEM_DIR /* use dirent.h */ 236 237#define POSIX /* affects getpagesize.h and systty.h */ 238#define POSIX_SIGNALS 239 240/* Best not to include -lg, unless it is last on the command line */ 241#define LIBS_DEBUG 242#ifndef __ELF__ 243#define LIB_STANDARD -lc /* avoid -lPW */ 244#else 245#undef LIB_GCC 246#define LIB_GCC 247#define LIB_STANDARD -lgcc -lc -lgcc /usr/lib/crtn.o 248#endif 249 250/* Don't use -g in test compiles in configure. 251 This is so we will use the same shared libs for that linking 252 that are used when linking temacs. */ 253#ifdef THIS_IS_CONFIGURE 254#define C_DEBUG_SWITCH 255#endif 256 257/* 21 Jun 06: Eric Hanchrow <offby1@blarg.net> says this works. */ 258#ifdef LINUX_SIGNALS_VIA_CHARACTERS_DOES_WORK 259#define SIGNALS_VIA_CHARACTERS 260#endif 261 262/* Rob Malouf <malouf@csli.stanford.edu> says: 263 SYSV IPC is standard a standard part of Linux since version 0.99pl10, 264 and is a very common addition to previous versions. */ 265 266#ifdef TERM 267#define LIBS_SYSTEM -lclient 268#define C_SWITCH_SYSTEM -D_BSD_SOURCE -I/usr/src/term 269#else 270/* alane@wozzle.linet.org says that -lipc is not a separate library, 271 since libc-4.4.1. So -lipc was deleted. */ 272#define LIBS_SYSTEM 273/* _BSD_SOURCE is redundant, at least in glibc2, since we define 274 _GNU_SOURCE. Left in in case it's relevant to libc5 systems and 275 anyone's still using Emacs on those. --fx 2002-12-14 */ 276#define C_SWITCH_SYSTEM -D_BSD_SOURCE 277#endif 278 279/* Paul Abrahams <abrahams@equinox.shaysnet.com> says this is needed. */ 280#define LIB_MOTIF -lXm -lXpm 281 282#ifdef HAVE_LIBNCURSES 283#define TERMINFO 284#define LIBS_TERMCAP -lncurses 285#endif 286 287#define HAVE_SYSVIPC 288 289#ifdef __ELF__ 290#define UNEXEC unexelf.o 291#ifndef LINUX_MAP_SHARED_DOES_WORK 292#define UNEXEC_USE_MAP_PRIVATE 293#endif 294#endif 295 296#ifdef LINUX_QMAGIC 297 298#define HAVE_TEXT_START 299#define UNEXEC unexsunos4.o 300#define N_PAGSIZ(x) PAGE_SIZE 301 302#else /* not LINUX_QMAGIC */ 303 304#define A_TEXT_OFFSET(hdr) (N_MAGIC(hdr) == QMAGIC ? sizeof (struct exec) : 0) 305#define A_TEXT_SEEK(hdr) (N_TXTOFF(hdr) + A_TEXT_OFFSET(hdr)) 306#define ADJUST_EXEC_HEADER \ 307 unexec_text_start = N_TXTADDR(ohdr) + A_TEXT_OFFSET(ohdr) 308 309#endif /* not LINUX_QMAGIC */ 310 311#if 0 312/* In 19.23 and 19.24, configure sometimes fails to define these. 313 It has to do with the fact that configure uses CFLAGS when linking 314 while Makefile.in.in (erroneously) fails to do so when linking temacs. */ 315#ifndef HAVE_GETTIMEOFDAY 316#define HAVE_GETTIMEOFDAY 317#endif 318#ifndef HAVE_MKDIR 319#define HAVE_MKDIR 320#endif 321#ifndef HAVE_RMDIR 322#define HAVE_RMDIR 323#endif 324#ifndef HAVE_XSCREENNUMBEROFSCREEN 325#define HAVE_XSCREENNUMBEROFSCREEN 326#endif 327#endif /* 0 */ 328 329/* This is to work around mysterious gcc failures in some system versions. 330 It is unlikely that Emacs changes will work around this problem; 331 therefore, this should remain permanently. */ 332#ifndef HAVE_XRMSETDATABASE 333#define HAVE_XRMSETDATABASE 334#endif 335 336/* The regex.o routines are a part of the GNU C-library used with Linux. */ 337/* However, sometimes they disagree with the src/regex.h that comes with Emacs, 338 and that can make trouble in etags.c because it gets the regex.h from Emacs 339 and the function definitions in libc. So turn this off. */ 340/* #define REGEXP_IN_LIBC */ 341 342/* Use BSD process groups, but use setpgid() instead of setpgrp() to 343 actually set a process group. */ 344 345#define BSD_PGRPS 346 347#define NARROWPROTO 1 348 349/* Use mmap directly for allocating larger buffers. */ 350#ifdef DOUG_LEA_MALLOC 351#undef REL_ALLOC 352#endif 353 354/* Tell that garbage collector that setjmp is known to save all 355 registers relevant for conservative garbage collection in the 356 jmp_buf. */ 357/* Not all the architectures are tested, but there are Debian packages 358 for SCM and/or Guile on them, so the technique must work. See also 359 comments in alloc.c concerning setjmp and gcc. Fixme: it's 360 probably safe to make this conditional just on GCC, except for ia64 361 register window-flushing. */ 362/* Don't use #cpu here since in newest development versions of GCC, 363 we must call cpp with -traditional, and that disables #cpu. */ 364 365#if defined __i386__ || defined __sparc__ || defined __mc68000__ \ 366 || defined __alpha__ || defined __mips__ || defined __s390__ \ 367 || defined __arm__ || defined __powerpc__ || defined __amd64__ \ 368 || defined __ia64__ 369#define GC_SETJMP_WORKS 1 370#define GC_MARK_STACK GC_MAKE_GCPROS_NOOPS 371#ifdef __mc68000__ 372#define GC_LISP_OBJECT_ALIGNMENT 2 373#endif 374#ifdef __ia64__ 375#define GC_MARK_SECONDARY_STACK() \ 376 do { \ 377 extern void *__libc_ia64_register_backing_store_base; \ 378 __builtin_ia64_flushrs (); \ 379 mark_memory (__libc_ia64_register_backing_store_base, \ 380 __builtin_ia64_bsp (), 0); \ 381 } while (0) 382#endif 383#endif 384 385/* arch-tag: 6244ea2a-abd0-44ec-abec-ff3dcc9afea9 386 (do not change this comment) */ 387