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, 2009 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 /* More specific than the above two.  We cannot use __APPLE__ as this
  31    may not be defined on non-OSX Darwin, and we cannot define DARWIN
  32    here because Panther and lower CoreFoundation.h uses DARWIN to
  33    distinguish OS X from pure Darwin. */
  34
  35 #define DARWIN_OS
  36
  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 /* This seems to help in Ctrl-G detection under Cocoa, however at the cost
 137    of some quirks that may or may not bother a given user.
 138    It was earlier commented that "In Carbon, asynchronous I/O (using SIGIO)
 139    can't be used for window events because they don't come from sockets,
 140    even though it works fine on tty's.  Uncertain about situation in Cocoa. */
 141 #ifdef COCOA_EXPERIMENTAL_CTRL_G
 142 #define NO_SOCK_SIGIO
 143 #endif
 144
 145 /* Definitions for how to dump.  Copied from nextstep.h.  */
 146
 147 #define UNEXEC unexmacosx.o
 148
 149 #define START_FILES pre-crt0.o
 150
 151 /* start_of_text isn't actually used, so make it compile without error.  */
 152 #define TEXT_START (0)
 153
 154 /* Definitions for how to compile & link.  */
 155
 156 #ifdef HAVE_NS
 157 #define LIBS_NSGUI -framework AppKit
 158 #define SYSTEM_PURESIZE_EXTRA 200000
 159 #define HEADERPAD_EXTRA 6C8
 160 #else /* !HAVE_NS */
 161 #define LIBS_NSGUI
 162 #define HEADERPAD_EXTRA 690
 163 #endif /* !HAVE_NS */
 164
 165 /* On Darwin, res_init appears not to be useful: see bug#562 and
 166    http://lists.gnu.org/archive/html/emacs-devel/2007-11/msg01467.html  */
 167
 168 #undef HAVE_RES_INIT
 169 #undef HAVE_LIBRESOLV
 170
 171 /* The -headerpad option tells ld (see man page) to leave room at the
 172    end of the header for adding load commands.  Needed for dumping.
 173    0x690 is the total size of 30 segment load commands (at 56
 174    each); under Cocoa 31 commands are required.  */
 175 #define LD_SWITCH_SYSTEM_TEMACS -prebind LIBS_NSGUI -Xlinker -headerpad -Xlinker HEADERPAD_EXTRA
 176
 177 #define C_SWITCH_SYSTEM_TEMACS -Dtemacs
 178
 179 #ifdef temacs
 180 #define malloc unexec_malloc
 181 #define realloc unexec_realloc
 182 #define free unexec_free
 183 #endif
 184
 185 /* The ncurses library has been moved out of the System framework in
 186    Mac OS X 10.2.  So if ./configure detects it, set the command-line
 187    option to use it.  */
 188 #ifdef HAVE_LIBNCURSES
 189 #define LIBS_TERMCAP -lncurses
 190 /* This prevents crashes when running Emacs in Terminal.app under
 191    10.2.  */
 192 #define TERMINFO
 193 #endif
 194
 195 /* Link this program just by running cc.  */
 196 #define ORDINARY_LINK
 197
 198 /* We don't have a g library, so override the -lg LIBS_DEBUG switch.  */
 199 #define LIBS_DEBUG
 200
 201 /* Adding -lm confuses the dynamic linker, so omit it.  */
 202 #define LIB_MATH
 203
 204 /* Define the following so emacs symbols will not conflict with those
 205    in the System framework.  Otherwise -prebind will not work.  */
 206
 207 /* Do not define abort in emacs.c.  */
 208 #define NO_ABORT
 209
 210 /* Do not define matherr in floatfns.c.  */
 211 #define NO_MATHERR
 212
 213 /* The following solves the problem that Emacs hangs when evaluating
 214    (make-comint "test0" "/nodir/nofile" nil "") when /nodir/nofile
 215    does not exist.  Also, setsid is not allowed in the vfork child's
 216    context as of Darwin 9/Mac OS X 10.5.  */
 217 #undef HAVE_WORKING_VFORK
 218 #define vfork fork
 219
 220 /* Don't close pty in process.c to make it as controlling terminal.
 221    It is already a controlling terminal of subprocess, because we did
 222    ioctl TIOCSCTTY.  */
 223 #define DONT_REOPEN_PTY
 224
 225 /* This makes create_process in process.c save and restore signal
 226    handlers correctly.  Suggested by Nozomu Ando.*/
 227 #define POSIX_SIGNALS
 228
 229 /* Use the GC_MAKE_GCPROS_NOOPS (see lisp.h) method for marking the
 230    stack.  */
 231 #define GC_MARK_STACK   GC_MAKE_GCPROS_NOOPS
 232
 233 /* arch-tag: 481d443d-4f89-43ea-b5fb-49706d95fa41
 234    (do not change this comment) */