code.delx.au - gnu-emacs/blob - src/s/gnu-linux.h

   1 /* This file is the configuration file for Linux-based GNU systems
   2
   3 Copyright (C) 1985, 1986, 1992, 1994, 1996, 1999, 2001, 2002, 2003, 2004,
   4   2005, 2006, 2007, 2008, 2009, 2010  Free Software Foundation, Inc.
   5
   6 This file was put together by Michael K. Johnson and Rik Faith.
   7
   8 This file is part of GNU Emacs.
   9
  10 GNU Emacs is free software: you can redistribute it and/or modify
  11 it under the terms of the GNU General Public License as published by
  12 the Free Software Foundation, either version 3 of the License, or
  13 (at your option) any later version.
  14
  15 GNU Emacs is distributed in the hope that it will be useful,
  16 but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 GNU General Public License for more details.
  19
  20 You should have received a copy of the GNU General Public License
  21 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
  22
  23 /* Define symbols to identify the version of Unix this is.
  24    Define all the symbols that apply correctly.  */
  25 #define USG
  26 #define GNU_LINUX
  27
  28 /* SYSTEM_TYPE should indicate the kind of system you are using.
  29    It sets the Lisp variable system-type.  */
  30 #define SYSTEM_TYPE "gnu/linux"         /* All the best software is free. */
  31
  32 #ifndef NOT_C_CODE
  33 #ifdef emacs
  34 #ifdef HAVE_LINUX_VERSION_H
  35 #include <linux/version.h>
  36
  37 #if LINUX_VERSION_CODE >= 0x20400
  38 /* 21 Jun 06: Eric Hanchrow <offby1@blarg.net> says this works.  */
  39 #define SIGNALS_VIA_CHARACTERS
  40 #endif /* LINUX_VERSION_CODE >= 0x20400 */
  41 #endif /* HAVE_LINUX_VERSION_H */
  42 #endif /* emacs */
  43 #endif /* NOT_C_CODE */
  44
  45 #if defined HAVE_GRANTPT
  46 #define UNIX98_PTYS
  47
  48 /* Run only once.  We need a `for'-loop because the code uses `continue'.  */
  49 #define PTY_ITERATION   for (i = 0; i < 1; i++)
  50
  51 #ifdef HAVE_GETPT
  52 #define PTY_NAME_SPRINTF
  53 #define PTY_OPEN fd = getpt ()
  54 #else /* not HAVE_GETPT */
  55 #define PTY_NAME_SPRINTF strcpy (pty_name, "/dev/ptmx");
  56 #endif /* not HAVE_GETPT */
  57
  58 /* Note that grantpt and unlockpt may fork.  We must block SIGCHLD to
  59    prevent sigchld_handler from intercepting the child's death.  */
  60 #define PTY_TTY_NAME_SPRINTF                            \
  61   {                                                     \
  62     char *ptyname;                                      \
  63                                                         \
  64     sigblock (sigmask (SIGCHLD));                       \
  65     if (grantpt (fd) == -1 || unlockpt (fd) == -1       \
  66         || !(ptyname = ptsname(fd)))                    \
  67       {                                                 \
  68         sigunblock (sigmask (SIGCHLD));                 \
  69         close (fd);                                     \
  70         return -1;                                      \
  71       }                                                 \
  72     strncpy (pty_name, ptyname, sizeof (pty_name));     \
  73     pty_name[sizeof (pty_name) - 1] = 0;                \
  74     sigunblock (sigmask (SIGCHLD));                     \
  75   }
  76
  77 #else /* not HAVE_GRANTPT */
  78
  79 /* Letter to use in finding device name of first pty,
  80    if system supports pty's.  'p' means it is /dev/ptyp0  */
  81 #define FIRST_PTY_LETTER 'p'
  82
  83 #endif  /* not HAVE_GRANTPT */
  84
  85 /*  Define HAVE_TERMIOS if the system provides POSIX-style
  86     functions and macros for terminal control.  */
  87 #define HAVE_TERMIOS
  88
  89 /* Define HAVE_PTYS if the system supports pty devices.  */
  90 #define HAVE_PTYS
  91
  92 #define HAVE_SOCKETS
  93
  94 /* Define this symbol if your system has the functions bcopy, etc.  */
  95 #define BSTRING
  96
  97 /* This is used in list_system_processes.  */
  98 #define HAVE_PROCFS 1
  99
 100
 101 /* Define CLASH_DETECTION if you want lock files to be written
 102    so that Emacs can tell instantly when you try to modify
 103    a file that someone else has modified in his Emacs.  */
 104 #define CLASH_DETECTION
 105
 106 /* Here, on a separate page, add any special hacks needed
 107    to make Emacs work on this system.  For example,
 108    you might define certain system call names that don't
 109    exist on your system, or that do different things on
 110    your system and must be used only through an encapsulation
 111    (Which you should place, by convention, in sysdep.c).  */
 112 \f
 113 /* This is needed for dispnew.c:update_frame.  */
 114 #ifdef emacs
 115 #include <stdio.h>  /* Get the definition of _IO_STDIO_H.  */
 116 #if defined(_IO_STDIO_H) || defined(_STDIO_USES_IOSTREAM)
 117 /* New C libio names.  */
 118 #define GNU_LIBRARY_PENDING_OUTPUT_COUNT(FILE) \
 119   ((FILE)->_IO_write_ptr - (FILE)->_IO_write_base)
 120 #elif defined (__UCLIBC__)
 121 /* Using the uClibc library.  */
 122 #define GNU_LIBRARY_PENDING_OUTPUT_COUNT(FILE) \
 123   ((FILE)->__bufpos - (FILE)->__bufstart)
 124 #else /* !_IO_STDIO_H && ! __UCLIBC__ */
 125 /* Old C++ iostream names.  */
 126 #define GNU_LIBRARY_PENDING_OUTPUT_COUNT(FILE) \
 127   ((FILE)->_pptr - (FILE)->_pbase)
 128 #endif /* !_IO_STDIO_H && ! __UCLIBC__ */
 129 #endif /* emacs */
 130
 131 #ifdef emacs
 132 #define INTERRUPT_INPUT
 133 #endif
 134
 135 #define SYSV_SYSTEM_DIR       /* use dirent.h */
 136
 137 #define POSIX                 /* affects getpagesize.h and systty.h */
 138
 139 #define UNEXEC unexelf.o
 140
 141 /* This is to work around mysterious gcc failures in some system versions.
 142    It is unlikely that Emacs changes will work around this problem;
 143    therefore, this should remain permanently.  */
 144 #ifndef HAVE_XRMSETDATABASE
 145 #define HAVE_XRMSETDATABASE
 146 #endif
 147
 148 #define NARROWPROTO 1
 149
 150 /* Use mmap directly for allocating larger buffers.  */
 151 #ifdef DOUG_LEA_MALLOC
 152 #undef REL_ALLOC
 153 #endif
 154
 155 /* Tell that garbage collector that setjmp is known to save all
 156    registers relevant for conservative garbage collection in the jmp_buf.  */
 157 /* Not all the architectures are tested, but there are Debian packages
 158    for SCM and/or Guile on them, so the technique must work.  See also
 159    comments in alloc.c concerning setjmp and gcc.  Fixme:  it's
 160    probably safe to make this conditional just on GCC, except for ia64
 161    register window-flushing.  */
 162 /* Don't use #cpu here since in newest development versions of GCC,
 163    we must call cpp with -traditional, and that disables #cpu.  */
 164 #if defined __i386__ || defined __sparc__ || defined __mc68000__ \
 165     || defined __alpha__ || defined __mips__ || defined __s390__ \
 166     || defined __arm__ || defined __powerpc__ || defined __amd64__ \
 167     || defined __ia64__ || defined __sh__
 168 #define GC_SETJMP_WORKS 1
 169 #define GC_MARK_STACK GC_MAKE_GCPROS_NOOPS
 170 #ifdef __mc68000__
 171 #define GC_LISP_OBJECT_ALIGNMENT 2
 172 #endif
 173 #ifdef __ia64__
 174 #define GC_MARK_SECONDARY_STACK()                               \
 175   do {                                                          \
 176     extern void *__libc_ia64_register_backing_store_base;       \
 177     __builtin_ia64_flushrs ();                                  \
 178     mark_memory (__libc_ia64_register_backing_store_base,       \
 179                  __builtin_ia64_bsp (), 0);                     \
 180   } while (0)
 181 #endif
 182 #endif
 183
 184 /* arch-tag: 6244ea2a-abd0-44ec-abec-ff3dcc9afea9
 185    (do not change this comment) */