src/s/cygwin.h

   1 /* Template for system description header files.
   2    This file describes the parameters that system description files
   3    should define or not.
   4    Copyright (C) 1985, 1986, 1992, 1999 Free Software Foundation, Inc.
   5
   6 This file is part of GNU Emacs.
   7
   8 GNU Emacs is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2, or (at your option)
  11 any later version.
  12
  13 GNU Emacs is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GNU Emacs; see the file COPYING.  If not, write to
  20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  21 Boston, MA 02111-1307, USA.  */
  22
  23 /* SYSTEM_TYPE should indicate the kind of system you are using.
  24  It sets the Lisp variable system-type.  */
  25
  26 #define SYSTEM_TYPE "cygwin"
  27
  28 /* Emacs can read input using SIGIO and buffering characters itself,
  29    or using CBREAK mode and making C-g cause SIGINT.
  30    The choice is controlled by the variable interrupt_input.
  31
  32    Define INTERRUPT_INPUT to make interrupt_input = 1 the default (use SIGIO)
  33
  34    Emacs uses the presence or absence of the SIGIO and BROKEN_SIGIO macros
  35    to indicate whether or not signal-driven I/O is possible.  It uses
  36    INTERRUPT_INPUT to decide whether to use it by default.
  37
  38    SIGIO can be used only on systems that implement it (4.2 and 4.3).
  39    CBREAK mode has two disadvantages
  40      1) At least in 4.2, it is impossible to handle the Meta key properly.
  41         I hear that in system V this problem does not exist.
  42      2) Control-G causes output to be discarded.
  43         I do not know whether this can be fixed in system V.
  44
  45    Another method of doing input is planned but not implemented.
  46    It would have Emacs fork off a separate process
  47    to read the input and send it to the true Emacs process
  48    through a pipe. */
  49
  50 #undef INTERRUPT_INPUT
  51
  52 /*
  53  *      Define HAVE_TERMIOS if the system provides POSIX-style
  54  *      functions and macros for terminal control.
  55  *
  56  *      Define HAVE_TERMIO if the system provides sysV-style ioctls
  57  *      for terminal control.
  58  *
  59  *      Do not define both.  HAVE_TERMIOS is preferred, if it is
  60  *      supported on your system.
  61  */
  62
  63 #define HAVE_TERMIOS
  64
  65 /*
  66  *      Define HAVE_PTYS if the system supports pty devices.
  67  */
  68
  69 #define HAVE_PTYS
  70 #define PTY_ITERATION           for (i = 0; i < 1; i++) /* ick */
  71 #define PTY_NAME_SPRINTF        /* none */
  72 #define PTY_TTY_NAME_SPRINTF    /* none */
  73 #define PTY_OPEN                                        \
  74   do                                                    \
  75     {                                                   \
  76       int dummy;                                        \
  77       SIGMASKTYPE mask;                                 \
  78       mask = sigblock (sigmask (SIGCHLD));              \
  79       if (-1 == openpty (&fd, &dummy, pty_name, 0, 0))  \
  80         fd = -1;                                        \
  81       sigsetmask (mask);                                \
  82       emacs_close (dummy);                              \
  83     }                                                   \
  84   while (0)
  85
  86 /* Define this symbol if your system has the functions bcopy, etc. */
  87
  88 #define BSTRING
  89
  90 /* subprocesses should be defined if you want to
  91    have code for asynchronous subprocesses
  92    (as used in M-x compile and M-x shell).
  93    This is generally OS dependent, and not supported
  94    under most USG systems. */
  95
  96 #define subprocesses
  97
  98 /* Define CLASH_DETECTION if you want lock files to be written
  99    so that Emacs can tell instantly when you try to modify
 100    a file that someone else has modified in his Emacs.  */
 101
 102 #define CLASH_DETECTION
 103
 104 /* If the system's imake configuration file defines `NeedWidePrototypes'
 105    as `NO', we must define NARROWPROTO manually.  Such a define is
 106    generated in the Makefile generated by `xmkmf'.  If we don't
 107    define NARROWPROTO, we will see the wrong function prototypes
 108    for X functions taking float or double parameters.  */
 109
 110 #define NARROWPROTO 1
 111
 112 /* used in various places to enable cygwin-specific code changes */
 113 #define CYGWIN 1
 114
 115 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_p - (FILE)->_bf._base)
 116 #define GETPGRP_NO_ARG 1
 117 #define SYSV_SYSTEM_DIR 1
 118 /* -lutil comes from inetutils and has pty functions in it */
 119 #define LIBS_SYSTEM -lutil
 120 /* undumping is not implemented yet */
 121 #define CANNOT_DUMP 1
 122 #define POSIX_SIGNALS 1
 123 /* force the emacs image to start high in memory, so dll relocation
 124    can put things in low memory without causing all sorts of grief for
 125    emacs lisp pointers */
 126 #define DATA_SEG_BITS 0x20000000
 127 #define LINKER $(CC) -Wl,--image-base,DATA_SEG_BITS
 128 /* gettext.h is in a strange place */
 129 #define C_SWITCH_SYSTEM -I/usr/share/gettext
 130
 131 /* Use terminfo instead of termcap.  Fewer environment variables to
 132    go wrong, more terminal types. */
 133 #define TERMINFO
 134
 135 #define HAVE_SOCKETS
 136 /* C-g aborts emacs without this */
 137 /*#define HAVE_VFORK*/
 138 /* Xaw3d causes problems -- might have been fixed by NARROWPROTO
 139    above, but I haven't tried it */
 140 #undef HAVE_XAW3D
 141
 142 /* vfork() interacts badly with setsid(), causing ptys to fail to
 143    change their controlling terminal */
 144 #define vfork fork
 145
 146 /* the end */