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 /* define MAIL_USE_FLOCK if the mailer uses flock
 106    to interlock access to /usr/spool/mail/$USER.
 107    The alternative is that a lock file named
 108    /usr/spool/mail/$USER.lock.  */
 109
 110 #define MAIL_USE_FLOCK
 111
 112 /* Define CLASH_DETECTION if you want lock files to be written
 113    so that Emacs can tell instantly when you try to modify
 114    a file that someone else has modified in his Emacs.  */
 115
 116 #define CLASH_DETECTION
 117
 118 /* Avoid the use of the name init_process (process.c) because it is
 119    also the name of a Mach system call.  */
 120 #define init_process emacs_init_process
 121
 122 /* Used in dispnew.c.  Copied from freebsd.h. */
 123 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_p - (FILE)->_bf._base)
 124
 125 /* System uses OXTABS instead of the expected TAB3.  (Copied from
 126    bsd386.h.)  */
 127 #define TAB3 OXTABS
 128
 129 /* Darwin ld insists on the use of malloc routines in the System
 130    framework.  */
 131 #define SYSTEM_MALLOC
 132
 133 /* Define HAVE_SOCKETS if system supports 4.2-compatible sockets.  */
 134 #define HAVE_SOCKETS
 135
 136 /* In Carbon, asynchronous I/O (using SIGIO) can't be used for window
 137    events because they don't come from sockets, even though it works
 138    fine on tty's.  */
 139 /* This seems to help in Ctrl-G detection under Cocoa, however at the cost
 140    of some quirks that may or may not bother a given user. */
 141 #if defined (HAVE_CARBON) || defined (COCOA_EXPERIMENTAL_CTRL_G)
 142 #define NO_SOCK_SIGIO
 143 #endif
 144
 145 /* Extra initialization calls in main for Mac OS X system type.  */
 146 #ifdef HAVE_CARBON
 147 #define SYMS_SYSTEM syms_of_mac()
 148 #endif
 149
 150 /* Definitions for how to dump.  Copied from nextstep.h.  */
 151
 152 #define UNEXEC unexmacosx.o
 153
 154 #define START_FILES pre-crt0.o
 155
 156 /* start_of_text isn't actually used, so make it compile without error.  */
 157 #define TEXT_START (0)
 158
 159 /* This seems to be right for end_of_text, but it may not be used anyway.  */
 160 #define TEXT_END get_etext()
 161
 162 /* This seems to be right for end_of_data, but it may not be used anyway.  */
 163 #define DATA_END get_edata()
 164
 165 /* Definitions for how to compile & link.  */
 166
 167 /* Link in the Carbon or AppKit lib. */
 168 #ifdef HAVE_NS
 169 /* PENDING: can this target be specified in a clearer way? */
 170 #define OTHER_FILES ns-app
 171 /* XXX: lresolv is here because configure when testing #undefs res_init,
 172         a macro in /usr/include/resolv.h for res_9_init, not in stdc lib. */
 173 #define LIBS_MACGUI -framework AppKit -lresolv
 174 #define SYSTEM_PURESIZE_EXTRA 200000
 175 #define HEADERPAD_EXTRA 6C8
 176 #else /* !HAVE_NS */
 177 #define HEADERPAD_EXTRA 690
 178
 179 /* This is for the Carbon port.  Under the NeXTstep port, this is still picked
 180    up during preprocessing, but is undone in config.in. */
 181 #define C_SWITCH_SYSTEM -fpascal-strings -DMAC_OSX
 182
 183 #ifdef HAVE_CARBON
 184
 185 /* We need a little extra space, see ../../lisp/loadup.el. */
 186 #define SYSTEM_PURESIZE_EXTRA 30000
 187
 188 /* Link in the Carbon lib. */
 189 #define LIBS_MACGUI -framework Carbon LIBS_IMAGE
 190
 191 #ifdef HAVE_AVAILABILITYMACROS_H
 192 #include <AvailabilityMacros.h>
 193 #endif
 194 /* Tell src/Makefile.in to create files in the Mac OS X application
 195    bundle mac/Emacs.app.  */
 196 #define OTHER_FILES macosx-app
 197
 198 /* Whether to use the Image I/O framework for reading images.  */
 199 #ifndef USE_MAC_IMAGE_IO
 200 #if MAC_OS_X_VERSION_MAX_ALLOWED >= 1040 && (MAC_OS_X_VERSION_MIN_REQUIRED >= 1040 || MAC_OS_X_VERSION_MIN_REQUIRED < 1020)
 201 #define USE_MAC_IMAGE_IO 1
 202 #endif
 203 #endif
 204
 205 /* If the Image I/O framework is not used, fall back on QuickTime.  */
 206 #if USE_MAC_IMAGE_IO
 207 #define LIBS_IMAGE
 208 #else
 209 #define LIBS_IMAGE -framework QuickTime
 210 #endif
 211
 212 /* Reroute calls to SELECT to the version defined in mac.c to fix the
 213    problem of Emacs requiring an extra return to be typed to start
 214    working when started from the command line.  */
 215 #if defined (emacs) || defined (temacs)
 216 #define select sys_select
 217 #endif
 218
 219 #else   /* !HAVE_CARBON */
 220 #define LIBS_MACGUI
 221 #endif  /* HAVE_CARBON */
 222
 223 #endif /* !HAVE_NS */
 224
 225 /* The -headerpad option tells ld (see man page) to leave room at the
 226    end of the header for adding load commands.  Needed for dumping.
 227    0x690 is the total size of 30 segment load commands (at 56
 228    each); under Cocoa 31 commands are required.  */
 229 #define LD_SWITCH_SYSTEM_TEMACS -prebind LIBS_MACGUI -Xlinker -headerpad -Xlinker HEADERPAD_EXTRA
 230
 231 #define C_SWITCH_SYSTEM_TEMACS -Dtemacs
 232
 233 /* The ncurses library has been moved out of the System framework in
 234    Mac OS X 10.2.  So if ./configure detects it, set the command-line
 235    option to use it.  */
 236 #ifdef HAVE_LIBNCURSES
 237 #define LIBS_TERMCAP -lncurses
 238 /* This prevents crashes when running Emacs in Terminal.app under
 239    10.2.  */
 240 #define TERMINFO
 241 #endif
 242
 243 /* Link this program just by running cc.  */
 244 #define ORDINARY_LINK
 245
 246 /* We don't have a g library, so override the -lg LIBS_DEBUG switch.  */
 247 #define LIBS_DEBUG
 248
 249 /* Adding -lm confuses the dynamic linker, so omit it.  */
 250 #define LIB_MATH
 251
 252 /* Define the following so emacs symbols will not conflict with those
 253    in the System framework.  Otherwise -prebind will not work.  */
 254
 255 /* Do not define abort in emacs.c.  */
 256 #define NO_ABORT
 257
 258 /* Do not define matherr in floatfns.c.  */
 259 #define NO_MATHERR
 260
 261 /* The following solves the problem that Emacs hangs when evaluating
 262    (make-comint "test0" "/nodir/nofile" nil "") when /nodir/nofile
 263    does not exist.  Also, setsid is not allowed in the vfork child's
 264    context as of Darwin 9/Mac OS X 10.5.  */
 265 #undef HAVE_WORKING_VFORK
 266 #define vfork fork
 267
 268 /* Don't close pty in process.c to make it as controlling terminal.
 269    It is already a controlling terminal of subprocess, because we did
 270    ioctl TIOCSCTTY.  */
 271 #define DONT_REOPEN_PTY
 272
 273 #ifdef temacs
 274 #define malloc unexec_malloc
 275 #define realloc unexec_realloc
 276 #define free unexec_free
 277 #endif
 278
 279 /* This makes create_process in process.c save and restore signal
 280    handlers correctly.  Suggested by Nozomu Ando.*/
 281 #define POSIX_SIGNALS
 282
 283 /* Use the GC_MAKE_GCPROS_NOOPS (see lisp.h) method for marking the
 284    stack.  */
 285 #define GC_MARK_STACK   GC_MAKE_GCPROS_NOOPS
 286
 287 /* arch-tag: 481d443d-4f89-43ea-b5fb-49706d95fa41
 288    (do not change this comment) */