src/s/darwin.h

   1 /* System description header file for Darwin (Mac OS X).
   2    Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007,
   3                  2008 Free Software Foundation, Inc.
   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 3 of the License, or
  10 (at your option) 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.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20
  21 /*
  22  *      Define symbols to identify the version of Unix this is.
  23  *      Define all the symbols that apply correctly.
  24  */
  25
  26 #define BSD4_2
  27 /* BSD4_3 and BSD4_4 are already defined in sys/param.h */
  28 #define BSD_SYSTEM
  29 /* #define VMS */
  30
  31 /* MAC_OS is used to conditionally compile code common to both MAC_OS8
  32    and MAC_OSX.  */
  33 #ifdef MAC_OSX
  34 #ifdef HAVE_CARBON
  35 #define MAC_OS
  36 /* We need a little extra space, see ../../lisp/loadup.el. */
  37 #define SYSTEM_PURESIZE_EXTRA 30000
  38
  39 #endif
  40 #endif
  41
  42 /* SYSTEM_TYPE should indicate the kind of system you are using.
  43  It sets the Lisp variable system-type.  */
  44
  45 #define SYSTEM_TYPE "darwin"
  46
  47 /* Emacs can read input using SIGIO and buffering characters itself,
  48    or using CBREAK mode and making C-g cause SIGINT.
  49    The choice is controlled by the variable interrupt_input.
  50
  51    Define INTERRUPT_INPUT to make interrupt_input = 1 the default (use SIGIO)
  52
  53    Emacs uses the presence or absence of the SIGIO and BROKEN_SIGIO macros
  54    to indicate whether or not signal-driven I/O is possible.  It uses
  55    INTERRUPT_INPUT to decide whether to use it by default.
  56
  57    SIGIO can be used only on systems that implement it (4.2 and 4.3).
  58    CBREAK mode has two disadvantages
  59      1) At least in 4.2, it is impossible to handle the Meta key properly.
  60         I hear that in system V this problem does not exist.
  61      2) Control-G causes output to be discarded.
  62         I do not know whether this can be fixed in system V.
  63
  64    Another method of doing input is planned but not implemented.
  65    It would have Emacs fork off a separate process
  66    to read the input and send it to the true Emacs process
  67    through a pipe. */
  68
  69 #define INTERRUPT_INPUT
  70
  71 /* Letter to use in finding device name of first pty,
  72   if system supports pty's.  'a' means it is /dev/ptya0  */
  73
  74 #define FIRST_PTY_LETTER 'p'
  75
  76 /*
  77  *      Define HAVE_TERMIOS if the system provides POSIX-style
  78  *      functions and macros for terminal control.
  79  *
  80  *      Define HAVE_TERMIO if the system provides sysV-style ioctls
  81  *      for terminal control.
  82  *
  83  *      Do not define both.  HAVE_TERMIOS is preferred, if it is
  84  *      supported on your system.
  85  */
  86
  87 #define HAVE_TERMIOS
  88 /* #define HAVE_TERMIO */
  89
  90 #define NO_TERMIO
  91
  92 /*
  93  *      Define HAVE_PTYS if the system supports pty devices.
  94  *      Note: PTYs are broken on darwin <6.  Use at your own risk.
  95  */
  96
  97 #define HAVE_PTYS
  98
  99 /**
 100  * PTYs only work correctly on Darwin 7 or higher.  So make the
 101  * default for process-connection-type dependent on the kernel
 102  * version.
 103  */
 104 #define MIN_PTY_KERNEL_VERSION '7'
 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
 123 #define MAIL_USE_FLOCK
 124
 125 /* Define CLASH_DETECTION if you want lock files to be written
 126    so that Emacs can tell instantly when you try to modify
 127    a file that someone else has modified in his Emacs.  */
 128
 129 #define CLASH_DETECTION
 130
 131 /* ============================================================ */
 132
 133 /* Here, add any special hacks needed
 134    to make Emacs work on this system.  For example,
 135    you might define certain system call names that don't
 136    exist on your system, or that do different things on
 137    your system and must be used only through an encapsulation
 138    (Which you should place, by convention, in sysdep.c).  */
 139
 140 /* ============================================================ */
 141
 142 /* After adding support for a new system, modify the large case
 143    statement in the `configure' script to recognize reasonable
 144    configuration names, and add a description of the system to
 145    `etc/MACHINES'.
 146
 147    If you've just fixed a problem in an existing configuration file,
 148    you should also check `etc/MACHINES' to make sure its descriptions
 149    of known problems in that configuration should be updated.  */
 150
 151
 152 /* Avoid the use of the name init_process (process.c) because it is
 153    also the name of a Mach system call.  */
 154 #define init_process emacs_init_process
 155
 156 /* Used in dispnew.c.  Copied from freebsd.h. */
 157 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_p - (FILE)->_bf._base)
 158
 159 /* System uses OXTABS instead of the expected TAB3.  (Copied from
 160    bsd386.h.)  */
 161 #define TAB3 OXTABS
 162
 163 /* Darwin ld insists on the use of malloc routines in the System
 164    framework.  */
 165 #define SYSTEM_MALLOC
 166
 167 /* Define HAVE_SOCKETS if system supports 4.2-compatible sockets.  */
 168 #define HAVE_SOCKETS
 169
 170 /* In Carbon, asynchronous I/O (using SIGIO) can't be used for window
 171    events because they don't come from sockets, even though it works
 172    fine on tty's.  */
 173 /* This seems to help in Ctrl-G detection under Cocoa, however at the cost
 174    of some quirks that may or may not bother a given user. */
 175 #if defined (HAVE_CARBON) || defined (COCOA_EXPERIMENTAL_CTRL_G)
 176 #define NO_SOCK_SIGIO
 177 #endif
 178
 179 /* Extra initialization calls in main for Mac OS X system type.  */
 180 #ifdef HAVE_CARBON
 181 #define SYMS_SYSTEM syms_of_mac()
 182 #endif
 183
 184 /* Definitions for how to dump.  Copied from nextstep.h.  */
 185
 186 #define UNEXEC unexmacosx.o
 187
 188 #define START_FILES pre-crt0.o
 189
 190 /* start_of_text isn't actually used, so make it compile without error.  */
 191 #define TEXT_START (0)
 192
 193 /* This seems to be right for end_of_text, but it may not be used anyway.  */
 194 #define TEXT_END get_etext()
 195
 196 /* This seems to be right for end_of_data, but it may not be used anyway.  */
 197 #define DATA_END get_edata()
 198
 199 /* Definitions for how to compile & link.  */
 200
 201 /* This is for the Carbon port.  Under the NeXTstep port, this is still picked
 202    up during preprocessing, but is undone in config.in. */
 203 #ifndef HAVE_NS
 204 #define C_SWITCH_SYSTEM -fpascal-strings -DMAC_OSX
 205 #endif
 206
 207 /* Link in the Carbon or AppKit lib. */
 208 #ifdef HAVE_NS
 209 /* PENDING: lresolv is here because configure when testing #undefs res_init,
 210             a macro in /usr/include/resolv.h for res_9_init, not in stdc lib. */
 211 #define LIBS_MACGUI -framework AppKit -lresolv
 212 #define SYSTEM_PURESIZE_EXTRA 200000
 213 #define HEADERPAD_EXTRA 6C8
 214 #else
 215 #define HEADERPAD_EXTRA 690
 216
 217 #ifdef HAVE_CARBON
 218
 219 #ifdef HAVE_AVAILABILITYMACROS_H
 220 #include <AvailabilityMacros.h>
 221 #endif
 222
 223 /* Whether to use the Image I/O framework for reading images.  */
 224 #ifndef USE_MAC_IMAGE_IO
 225 #if MAC_OS_X_VERSION_MAX_ALLOWED >= 1040 && (MAC_OS_X_VERSION_MIN_REQUIRED >= 1040 || MAC_OS_X_VERSION_MIN_REQUIRED < 1020)
 226 #define USE_MAC_IMAGE_IO 1
 227 #endif
 228 #endif
 229
 230 /* If the Image I/O framework is not used, fall back on QuickTime.  */
 231 #if USE_MAC_IMAGE_IO
 232 #define LIBS_IMAGE
 233 #else
 234 #define LIBS_IMAGE -framework QuickTime
 235 #endif
 236
 237 #endif  /* HAVE_CARBON */
 238
 239 /* Link in the Carbon lib. */
 240 #ifdef HAVE_CARBON
 241 #define LIBS_MACGUI -framework Carbon LIBS_IMAGE
 242 #else
 243 #define LIBS_MACGUI
 244 #endif /* !HAVE_CARBON */
 245 #endif /* !HAVE_NS */
 246
 247 /* The -headerpad option tells ld (see man page) to leave room at the
 248    end of the header for adding load commands.  Needed for dumping.
 249    0x690 is the total size of 30 segment load commands (at 56
 250    each); under Cocoa 31 commands are required.  */
 251 #define LD_SWITCH_SYSTEM_TEMACS -prebind LIBS_MACGUI -Xlinker -headerpad -Xlinker HEADERPAD_EXTRA
 252
 253 #define C_SWITCH_SYSTEM_TEMACS -Dtemacs
 254
 255 /* The ncurses library has been moved out of the System framework in
 256    Mac OS X 10.2.  So if ./configure detects it, set the command-line
 257    option to use it.  */
 258 #ifdef HAVE_LIBNCURSES
 259 #define LIBS_TERMCAP -lncurses
 260 /* This prevents crashes when running Emacs in Terminal.app under
 261    10.2.  */
 262 #define TERMINFO
 263 #endif
 264
 265 /* Link this program just by running cc.  */
 266 #define ORDINARY_LINK
 267
 268 /* We don't have a g library, so override the -lg LIBS_DEBUG switch.  */
 269 #define LIBS_DEBUG
 270
 271 /* Adding -lm confuses the dynamic linker, so omit it.  */
 272 #define LIB_MATH
 273
 274 /* Tell src/Makefile.in to create files in the Mac OS X application
 275    bundle mac/Emacs.app.  */
 276 #ifdef HAVE_CARBON
 277 #define OTHER_FILES macosx-app
 278 #endif
 279
 280 /* PENDING: can this target be specified in a clearer way? */
 281 #ifdef HAVE_NS
 282 #define OTHER_FILES ns-app
 283 #endif
 284
 285
 286 /* Define the following so emacs symbols will not conflict with those
 287    in the System framework.  Otherwise -prebind will not work.  */
 288
 289 /* Do not define abort in emacs.c.  */
 290 #define NO_ABORT
 291
 292 /* Do not define matherr in floatfns.c.  */
 293 #define NO_MATHERR
 294
 295
 296 /* The following solves the problem that Emacs hangs when evaluating
 297    (make-comint "test0" "/nodir/nofile" nil "") when /nodir/nofile
 298    does not exist.  */
 299 #undef HAVE_WORKING_VFORK
 300 #define vfork fork
 301
 302 /* Don't close pty in process.c to make it as controlling terminal.
 303    It is already a controlling terminal of subprocess, because we did
 304    ioctl TIOCSCTTY.  */
 305 #define DONT_REOPEN_PTY
 306
 307 #ifdef temacs
 308 #define malloc unexec_malloc
 309 #define realloc unexec_realloc
 310 #define free unexec_free
 311 #endif
 312
 313 /* This makes create_process in process.c save and restore signal
 314    handlers correctly.  Suggested by Nozomu Ando.*/
 315 #define POSIX_SIGNALS
 316
 317 /* Reroute calls to SELECT to the version defined in mac.c to fix the
 318    problem of Emacs requiring an extra return to be typed to start
 319    working when started from the command line.  */
 320 #if defined (HAVE_CARBON) && (defined (emacs) || defined (temacs))
 321 #define select sys_select
 322 #endif
 323
 324 /* Use the GC_MAKE_GCPROS_NOOPS (see lisp.h) method for marking the
 325    stack.  */
 326 #define GC_MARK_STACK   GC_MAKE_GCPROS_NOOPS
 327
 328 /* arch-tag: 481d443d-4f89-43ea-b5fb-49706d95fa41
 329    (do not change this comment) */