src/s/cygwin.h

   1 /* System description header file for Cygwin.
   2    Copyright (C) 1985, 1986, 1992, 1999, 2002, 2003, 2004, 2005, 2006,
   3                  2007, 2008, 2009, 2010 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 /* SYSTEM_TYPE should indicate the kind of system you are using.
  21  It sets the Lisp variable system-type.  */
  22
  23 #define SYSTEM_TYPE "cygwin"
  24
  25 /* Emacs can read input using SIGIO and buffering characters itself,
  26    or using CBREAK mode and making C-g cause SIGINT.
  27    The choice is controlled by the variable interrupt_input.
  28
  29    Define INTERRUPT_INPUT to make interrupt_input = 1 the default (use SIGIO)
  30
  31    Emacs uses the presence or absence of the SIGIO and BROKEN_SIGIO macros
  32    to indicate whether or not signal-driven I/O is possible.  It uses
  33    INTERRUPT_INPUT to decide whether to use it by default.
  34
  35    SIGIO can be used only on systems that implement it (4.2 and 4.3).
  36    CBREAK mode has two disadvantages
  37      1) At least in 4.2, it is impossible to handle the Meta key properly.
  38         I hear that in system V this problem does not exist.
  39      2) Control-G causes output to be discarded.
  40         I do not know whether this can be fixed in system V.
  41
  42    Another method of doing input is planned but not implemented.
  43    It would have Emacs fork off a separate process
  44    to read the input and send it to the true Emacs process
  45    through a pipe. */
  46
  47 #undef INTERRUPT_INPUT
  48
  49 /*
  50  *      Define HAVE_TERMIOS if the system provides POSIX-style
  51  *      functions and macros for terminal control.
  52  *
  53  *      Define HAVE_TERMIO if the system provides sysV-style ioctls
  54  *      for terminal control.
  55  *
  56  *      Do not define both.  HAVE_TERMIOS is preferred, if it is
  57  *      supported on your system.
  58  */
  59
  60 #define HAVE_TERMIOS
  61
  62 /*
  63  *      Define HAVE_PTYS if the system supports pty devices.
  64  */
  65
  66 #define HAVE_PTYS
  67 #define PTY_ITERATION           for (i = 0; i < 1; i++) /* ick */
  68 #define PTY_NAME_SPRINTF        /* none */
  69 #define PTY_TTY_NAME_SPRINTF    /* none */
  70 #define PTY_OPEN                                        \
  71   do                                                    \
  72     {                                                   \
  73       int dummy;                                        \
  74       SIGMASKTYPE mask;                                 \
  75       mask = sigblock (sigmask (SIGCHLD));              \
  76       if (-1 == openpty (&fd, &dummy, pty_name, 0, 0))  \
  77         fd = -1;                                        \
  78       sigsetmask (mask);                                \
  79       emacs_close (dummy);                              \
  80     }                                                   \
  81   while (0)
  82
  83 /* Define this symbol if your system has the functions bcopy, etc. */
  84
  85 #define BSTRING
  86
  87 /* Define CLASH_DETECTION if you want lock files to be written
  88    so that Emacs can tell instantly when you try to modify
  89    a file that someone else has modified in his Emacs.  */
  90
  91 #define CLASH_DETECTION
  92
  93 /* If the system's imake configuration file defines `NeedWidePrototypes'
  94    as `NO', we must define NARROWPROTO manually.  Such a define is
  95    generated in the Makefile generated by `xmkmf'.  If we don't
  96    define NARROWPROTO, we will see the wrong function prototypes
  97    for X functions taking float or double parameters.  */
  98
  99 #define NARROWPROTO 1
 100
 101 /* used in various places to enable cygwin-specific code changes */
 102 #define CYGWIN 1
 103
 104 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_p - (FILE)->_bf._base)
 105 #define SYSV_SYSTEM_DIR 1
 106 #define UNEXEC unexcw.o
 107 #define POSIX_SIGNALS 1
 108 #define LINKER $(CC)
 109
 110 /* Use terminfo instead of termcap.  Fewer environment variables to
 111    go wrong, more terminal types. */
 112 #define TERMINFO
 113
 114 #define HAVE_SOCKETS
 115
 116 /* vfork() interacts badly with setsid(), causing ptys to fail to
 117    change their controlling terminal */
 118 #define vfork fork
 119
 120 /* This should work (at least when compiling with gcc).  But I have no way
 121    or intention to verify or even test it.  If you encounter a problem with
 122    it, feel free to change this setting, but please add a comment here about
 123    why it needed to be changed.  */
 124 #define GC_MARK_STACK GC_MAKE_GCPROS_NOOPS
 125
 126 /* Virtual addresses of pure and impure space can vary, as on Windows.  */
 127 #define VIRT_ADDR_VARIES
 128
 129 /* Emacs supplies its own malloc, but glib (part of Gtk+) calls
 130    memalign and on Cygwin, that becomes the Cygwin-supplied memalign.
 131    As malloc is not the Cygwin malloc, the Cygwin memalign always
 132    returns ENOSYS.  A workaround is to set G_SLICE=always-malloc. */
 133 #define G_SLICE_ALWAYS_MALLOC
 134
 135 /* Send signals to subprocesses by "typing" special chars at them.  */
 136 #define SIGNALS_VIA_CHARACTERS
 137
 138 /* the end */
 139
 140 /* arch-tag: 5ae7ba00-83b0-4ab3-806a-3e845779191b
 141    (do not change this comment) */