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
  30 /* MAC_OS is used to conditionally compile code common to both MAC_OS8
  31    and MAC_OSX.  */
  32 #ifdef MAC_OSX
  33 #ifdef HAVE_CARBON
  34 #define MAC_OS
  35 #endif
  36 #endif
  37
  38 /* SYSTEM_TYPE should indicate the kind of system you are using.
  39  It sets the Lisp variable system-type.  */
  40
  41 #define SYSTEM_TYPE "darwin"
  42
  43 /* Emacs can read input using SIGIO and buffering characters itself,
  44    or using CBREAK mode and making C-g cause SIGINT.
  45    The choice is controlled by the variable interrupt_input.
  46
  47    Define INTERRUPT_INPUT to make interrupt_input = 1 the default (use SIGIO)
  48
  49    Emacs uses the presence or absence of the SIGIO and BROKEN_SIGIO macros
  50    to indicate whether or not signal-driven I/O is possible.  It uses
  51    INTERRUPT_INPUT to decide whether to use it by default.
  52
  53    SIGIO can be used only on systems that implement it (4.2 and 4.3).
  54    CBREAK mode has two disadvantages
  55      1) At least in 4.2, it is impossible to handle the Meta key properly.
  56         I hear that in system V this problem does not exist.
  57      2) Control-G causes output to be discarded.
  58         I do not know whether this can be fixed in system V.
  59
  60    Another method of doing input is planned but not implemented.
  61    It would have Emacs fork off a separate process
  62    to read the input and send it to the true Emacs process
  63    through a pipe. */
  64
  65 #define INTERRUPT_INPUT
  66
  67 /* Letter to use in finding device name of first pty,
  68   if system supports pty's.  'a' means it is /dev/ptya0  */
  69
  70 #define FIRST_PTY_LETTER 'p'
  71
  72 /*
  73  *      Define HAVE_TERMIOS if the system provides POSIX-style
  74  *      functions and macros for terminal control.
  75  *
  76  *      Define HAVE_TERMIO if the system provides sysV-style ioctls
  77  *      for terminal control.
  78  *
  79  *      Do not define both.  HAVE_TERMIOS is preferred, if it is
  80  *      supported on your system.
  81  */
  82
  83 #define HAVE_TERMIOS
  84
  85 #define NO_TERMIO
  86
  87 /*
  88  *      Define HAVE_PTYS if the system supports pty devices.
  89  *      Note: PTYs are broken on darwin <6.  Use at your own risk.
  90  */
  91
  92 #define HAVE_PTYS
  93
  94 /**
  95  * PTYs only work correctly on Darwin 7 or higher.  So make the
  96  * default for process-connection-type dependent on the kernel
  97  * version.
  98  */
  99 #define MIN_PTY_KERNEL_VERSION '7'
 100
 101 /* Define this symbol if your system has the functions bcopy, etc. */
 102
 103 #define BSTRING
 104
 105 /* subprocesses should be defined if you want to
 106    have code for asynchronous subprocesses
 107    (as used in M-x compile and M-x shell).
 108    This is generally OS dependent, and not supported
 109    under most USG systems. */
 110
 111 #define subprocesses
 112
 113 /* define MAIL_USE_FLOCK if the mailer uses flock
 114    to interlock access to /usr/spool/mail/$USER.
 115    The alternative is that a lock file named
 116    /usr/spool/mail/$USER.lock.  */
 117
 118 #define MAIL_USE_FLOCK
 119
 120 /* Define CLASH_DETECTION if you want lock files to be written
 121    so that Emacs can tell instantly when you try to modify
 122    a file that someone else has modified in his Emacs.  */
 123
 124 #define CLASH_DETECTION
 125
 126 /* Avoid the use of the name init_process (process.c) because it is
 127    also the name of a Mach system call.  */
 128 #define init_process emacs_init_process
 129
 130 /* Used in dispnew.c.  Copied from freebsd.h. */
 131 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_p - (FILE)->_bf._base)
 132
 133 /* System uses OXTABS instead of the expected TAB3.  (Copied from
 134    bsd386.h.)  */
 135 #define TAB3 OXTABS
 136
 137 /* Darwin ld insists on the use of malloc routines in the System
 138    framework.  */
 139 #define SYSTEM_MALLOC
 140
 141 /* Define HAVE_SOCKETS if system supports 4.2-compatible sockets.  */
 142 #define HAVE_SOCKETS
 143
 144 /* In Carbon, asynchronous I/O (using SIGIO) can't be used for window
 145    events because they don't come from sockets, even though it works
 146    fine on tty's.  */
 147 /* This seems to help in Ctrl-G detection under Cocoa, however at the cost
 148    of some quirks that may or may not bother a given user. */
 149 #if defined (HAVE_CARBON) || defined (COCOA_EXPERIMENTAL_CTRL_G)
 150 #define NO_SOCK_SIGIO
 151 #endif
 152
 153 /* Extra initialization calls in main for Mac OS X system type.  */
 154 #ifdef HAVE_CARBON
 155 #define SYMS_SYSTEM syms_of_mac()
 156 #endif
 157
 158 /* Definitions for how to dump.  Copied from nextstep.h.  */
 159
 160 #define UNEXEC unexmacosx.o
 161
 162 #define START_FILES pre-crt0.o
 163
 164 /* start_of_text isn't actually used, so make it compile without error.  */
 165 #define TEXT_START (0)
 166
 167 /* This seems to be right for end_of_text, but it may not be used anyway.  */
 168 #define TEXT_END get_etext()
 169
 170 /* This seems to be right for end_of_data, but it may not be used anyway.  */
 171 #define DATA_END get_edata()
 172
 173 /* Definitions for how to compile & link.  */
 174
 175 /* Link in the Carbon or AppKit lib. */
 176 #ifdef HAVE_NS
 177 /* PENDING: can this target be specified in a clearer way? */
 178 #define OTHER_FILES ns-app
 179 /* XXX: lresolv is here because configure when testing #undefs res_init,
 180         a macro in /usr/include/resolv.h for res_9_init, not in stdc lib. */
 181 #define LIBS_MACGUI -framework AppKit -lresolv
 182 #define SYSTEM_PURESIZE_EXTRA 200000
 183 #define HEADERPAD_EXTRA 6C8
 184 #else /* !HAVE_NS */
 185 #define HEADERPAD_EXTRA 690
 186
 187 /* This is for the Carbon port.  Under the NeXTstep port, this is still picked
 188    up during preprocessing, but is undone in config.in. */
 189 #define C_SWITCH_SYSTEM -fpascal-strings -DMAC_OSX
 190
 191 #ifdef HAVE_CARBON
 192
 193 /* We need a little extra space, see ../../lisp/loadup.el. */
 194 #define SYSTEM_PURESIZE_EXTRA 30000
 195
 196 /* Link in the Carbon lib. */
 197 #define LIBS_MACGUI -framework Carbon LIBS_IMAGE
 198
 199 #ifdef HAVE_AVAILABILITYMACROS_H
 200 #include <AvailabilityMacros.h>
 201 #endif
 202 /* Tell src/Makefile.in to create files in the Mac OS X application
 203    bundle mac/Emacs.app.  */
 204 #define OTHER_FILES macosx-app
 205
 206 /* Whether to use the Image I/O framework for reading images.  */
 207 #ifndef USE_MAC_IMAGE_IO
 208 #if MAC_OS_X_VERSION_MAX_ALLOWED >= 1040 && (MAC_OS_X_VERSION_MIN_REQUIRED >= 1040 || MAC_OS_X_VERSION_MIN_REQUIRED < 1020)
 209 #define USE_MAC_IMAGE_IO 1
 210 #endif
 211 #endif
 212
 213 /* If the Image I/O framework is not used, fall back on QuickTime.  */
 214 #if USE_MAC_IMAGE_IO
 215 #define LIBS_IMAGE
 216 #else
 217 #define LIBS_IMAGE -framework QuickTime
 218 #endif
 219
 220 /* Reroute calls to SELECT to the version defined in mac.c to fix the
 221    problem of Emacs requiring an extra return to be typed to start
 222    working when started from the command line.  */
 223 #if defined (emacs) || defined (temacs)
 224 #define select sys_select
 225 #endif
 226
 227 #else   /* !HAVE_CARBON */
 228 #define LIBS_MACGUI
 229 #endif  /* HAVE_CARBON */
 230
 231 #endif /* !HAVE_NS */
 232
 233 /* The -headerpad option tells ld (see man page) to leave room at the
 234    end of the header for adding load commands.  Needed for dumping.
 235    0x690 is the total size of 30 segment load commands (at 56
 236    each); under Cocoa 31 commands are required.  */
 237 #define LD_SWITCH_SYSTEM_TEMACS -prebind LIBS_MACGUI -Xlinker -headerpad -Xlinker HEADERPAD_EXTRA
 238
 239 #define C_SWITCH_SYSTEM_TEMACS -Dtemacs
 240
 241 /* The ncurses library has been moved out of the System framework in
 242    Mac OS X 10.2.  So if ./configure detects it, set the command-line
 243    option to use it.  */
 244 #ifdef HAVE_LIBNCURSES
 245 #define LIBS_TERMCAP -lncurses
 246 /* This prevents crashes when running Emacs in Terminal.app under
 247    10.2.  */
 248 #define TERMINFO
 249 #endif
 250
 251 /* Link this program just by running cc.  */
 252 #define ORDINARY_LINK
 253
 254 /* We don't have a g library, so override the -lg LIBS_DEBUG switch.  */
 255 #define LIBS_DEBUG
 256
 257 /* Adding -lm confuses the dynamic linker, so omit it.  */
 258 #define LIB_MATH
 259
 260 /* Define the following so emacs symbols will not conflict with those
 261    in the System framework.  Otherwise -prebind will not work.  */
 262
 263 /* Do not define abort in emacs.c.  */
 264 #define NO_ABORT
 265
 266 /* Do not define matherr in floatfns.c.  */
 267 #define NO_MATHERR
 268
 269 /* The following solves the problem that Emacs hangs when evaluating
 270    (make-comint "test0" "/nodir/nofile" nil "") when /nodir/nofile
 271    does not exist.  Also, setsid is not allowed in the vfork child's
 272    context as of Darwin 9/Mac OS X 10.5.  */
 273 #undef HAVE_WORKING_VFORK
 274 #define vfork fork
 275
 276 /* Don't close pty in process.c to make it as controlling terminal.
 277    It is already a controlling terminal of subprocess, because we did
 278    ioctl TIOCSCTTY.  */
 279 #define DONT_REOPEN_PTY
 280
 281 #ifdef temacs
 282 #define malloc unexec_malloc
 283 #define realloc unexec_realloc
 284 #define free unexec_free
 285 #endif
 286
 287 /* This makes create_process in process.c save and restore signal
 288    handlers correctly.  Suggested by Nozomu Ando.*/
 289 #define POSIX_SIGNALS
 290
 291 /* Use the GC_MAKE_GCPROS_NOOPS (see lisp.h) method for marking the
 292    stack.  */
 293 #define GC_MARK_STACK   GC_MAKE_GCPROS_NOOPS
 294
 295 /* arch-tag: 481d443d-4f89-43ea-b5fb-49706d95fa41
 296    (do not change this comment) */