src/s/freebsd.h

   1 /* System description header for FreeBSD systems.
   2
   3 Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
   4   2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
   5   Free Software Foundation, Inc.
   6
   7 Author: Shawn M. Carey
   8 (according to authors.el)
   9
  10 This file is part of GNU Emacs.
  11
  12 GNU Emacs is free software: you can redistribute it and/or modify
  13 it under the terms of the GNU General Public License as published by
  14 the Free Software Foundation, either version 3 of the License, or
  15 (at your option) any later version.
  16
  17 GNU Emacs is distributed in the hope that it will be useful,
  18 but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 GNU General Public License for more details.
  21
  22 You should have received a copy of the GNU General Public License
  23 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
  24
  25 /* Get most of the stuff from bsd-common */
  26 #include "bsd-common.h"
  27
  28 /* For mem-limits.h. */
  29 #define BSD4_2
  30
  31 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_p - (FILE)->_bf._base)
  32
  33 #undef LIB_GCC
  34 #define LIB_GCC
  35
  36 #define HAVE_GETLOADAVG 1
  37 #define DECLARE_GETPWUID_WITH_UID_T
  38
  39 /* this silences a few compilation warnings */
  40 #undef BSD_SYSTEM
  41 #if __FreeBSD__ == 1
  42 #define BSD_SYSTEM 199103
  43 #elif __FreeBSD__ == 2
  44 #define BSD_SYSTEM 199306
  45 #elif __FreeBSD__ >= 3
  46 #define BSD_SYSTEM 199506
  47 #endif
  48
  49 /* Don't close pty in process.c to make it as controlling terminal.
  50    It is already a controlling terminal of subprocess, because we did
  51    ioctl TIOCSCTTY.  */
  52 #define DONT_REOPEN_PTY
  53
  54 /* Circumvent a bug in FreeBSD.  In the following sequence of
  55    writes/reads on a PTY, read(2) returns bogus data:
  56
  57    write(2)  1022 bytes
  58    write(2)   954 bytes, get EAGAIN
  59    read(2)   1024 bytes in process_read_output
  60    read(2)     11 bytes in process_read_output
  61
  62    That is, read(2) returns more bytes than have ever been written
  63    successfully.  The 1033 bytes read are the 1022 bytes written
  64    successfully after processing (for example with CRs added if the
  65    terminal is set up that way which it is here).  The same bytes will
  66    be seen again in a later read(2), without the CRs.  */
  67
  68 #define BROKEN_PTY_READ_AFTER_EAGAIN 1
  69
  70 /* Tell that garbage collector that setjmp is known to save all
  71    registers relevant for conservative garbage collection in the
  72    jmp_buf.  */
  73
  74 #define GC_SETJMP_WORKS 1
  75
  76 /* Use the GC_MAKE_GCPROS_NOOPS (see lisp.h) method for marking the
  77    stack.  */
  78
  79 #define GC_MARK_STACK   GC_MAKE_GCPROS_NOOPS
  80
  81 /* Define USE_MMAP_FOR_BUFFERS to let Emacs use mmap(2) to allocate
  82    buffer text.  This overrides REL_ALLOC.  */
  83
  84 #define USE_MMAP_FOR_BUFFERS    1
  85
  86 /* arch-tag: 426529ca-b7c4-448f-b10a-d4dcdc9c78eb
  87    (do not change this comment) */