src/s/freebsd.h

   1 /* System description header for FreeBSD systems.
   2    This file describes the parameters that system description files
   3    should define or not.
   4    Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
   5                  2003, 2004, 2005, 2006, 2007, 2008, 2009
   6                  Free Software Foundation, Inc.
   7
   8 Author: Shawn M. Carey
   9 (according to authors.el)
  10
  11 This file is part of GNU Emacs.
  12
  13 GNU Emacs is free software: you can redistribute it and/or modify
  14 it under the terms of the GNU General Public License as published by
  15 the Free Software Foundation, either version 3 of the License, or
  16 (at your option) any later version.
  17
  18 GNU Emacs is distributed in the hope that it will be useful,
  19 but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 GNU General Public License for more details.
  22
  23 You should have received a copy of the GNU General Public License
  24 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
  25
  26 /* Get the correct __FreeBSD_version, even if this is before that was
  27    defined. */
  28 #ifndef __FreeBSD_version
  29 #ifndef __FreeBSD__
  30 #define __FreeBSD_version 199401
  31 #elif __FreeBSD__ == 1
  32 #define __FreeBSD_version 199405
  33 #else
  34 #include <osreldate.h>
  35 #endif
  36 #endif /* !defined __FreeBSD_version */
  37
  38 /* '__FreeBSD__' is defined by the preprocessor on FreeBSD-1.1 and up.
  39    Earlier versions do not have shared libraries, so inhibit them.
  40    You can inhibit them on newer systems if you wish
  41    by defining NO_SHARED_LIBS.  */
  42 #ifndef __FreeBSD__
  43 #define NO_SHARED_LIBS
  44 #endif
  45
  46 /* Get most of the stuff from bsd-common */
  47 #include "bsd-common.h"
  48
  49 /* For mem-limits.h. */
  50 #define BSD4_2
  51
  52 /* These aren't needed, since we have getloadavg.  */
  53 #undef KERNEL_FILE
  54 #undef LDAV_SYMBOL
  55
  56 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_p - (FILE)->_bf._base)
  57
  58 #define LIBS_DEBUG
  59 #define LIBS_SYSTEM -lutil
  60 #if __FreeBSD_version < 400000
  61 #define LIBS_TERMCAP -ltermcap
  62 #else
  63 #define TERMINFO
  64 #define LIBS_TERMCAP -lncurses
  65 #endif
  66
  67 #define SYSV_SYSTEM_DIR
  68
  69 /* freebsd has POSIX-style pgrp behavior. */
  70 #undef BSD_PGRPS
  71
  72 #ifdef __ELF__
  73
  74 /* Let `ld' find image libs and similar things in /usr/local/lib.  The
  75    system compiler, GCC, has apparently been modified to not look
  76    there, contrary to what a stock GCC would do.  */
  77
  78 #define LD_SWITCH_SYSTEM  -L/usr/local/lib
  79 #define START_FILES pre-crt0.o /usr/lib/crt1.o /usr/lib/crti.o /usr/lib/crtbegin.o
  80 #define UNEXEC unexelf.o
  81 #define LIB_STANDARD -lgcc -lc -lgcc /usr/lib/crtend.o /usr/lib/crtn.o
  82 #undef LIB_GCC
  83 #define LIB_GCC
  84
  85 #else /* not __ELF__ */
  86
  87 #ifndef NO_SHARED_LIBS
  88 #define LD_SWITCH_SYSTEM -e start -dc -L/usr/local/lib
  89 #define HAVE_TEXT_START         /* No need to define `start_of_text'. */
  90 #if __FreeBSD_version >= 300002
  91 #define START_FILES pre-crt0.o /usr/lib/aout/crt0.o
  92 #else /* __FreeBSD_version < 300002 */
  93 #define START_FILES pre-crt0.o /usr/lib/crt0.o
  94 #endif /* __FreeBSD_version < 300002 */
  95 #define UNEXEC unexsunos4.o
  96 #define RUN_TIME_REMAP
  97 #define LIB_GCC -lgcc
  98
  99 #else /* NO_SHARED_LIBS */
 100 #ifdef __FreeBSD__  /* shared libs are available, but the user prefers
 101                      not to use them.  */
 102 #define LD_SWITCH_SYSTEM -Bstatic -L/usr/local/lib
 103 #endif /* __FreeBSD__ */
 104 #endif /* NO_SHARED_LIBS */
 105
 106 #endif /* not __ELF__ */
 107
 108 #define HAVE_GETLOADAVG 1
 109 #define HAVE_TERMIOS
 110 #define NO_TERMIO
 111 #define DECLARE_GETPWUID_WITH_UID_T
 112
 113 /* freebsd uses OXTABS instead of the expected TAB3. */
 114 #define TABDLY OXTABS
 115 #define TAB3 OXTABS
 116
 117 /* this silences a few compilation warnings */
 118 #undef BSD_SYSTEM
 119 #if __FreeBSD__ == 1
 120 #define BSD_SYSTEM 199103
 121 #elif __FreeBSD__ == 2
 122 #define BSD_SYSTEM 199306
 123 #elif __FreeBSD__ >= 3
 124 #define BSD_SYSTEM 199506
 125 #endif
 126
 127 /* Don't close pty in process.c to make it as controlling terminal.
 128    It is already a controlling terminal of subprocess, because we did
 129    ioctl TIOCSCTTY.  */
 130 #define DONT_REOPEN_PTY
 131
 132 /* If the system's imake configuration file defines `NeedWidePrototypes'
 133    as `NO', we must define NARROWPROTO manually.  Such a define is
 134    generated in the Makefile generated by `xmkmf'.  If we don't
 135    define NARROWPROTO, we will see the wrong function prototypes
 136    for X functions taking float or double parameters.  */
 137
 138 #define NARROWPROTO 1
 139
 140 /* The following is needed to make `configure' find Xpm, Xaw3d and
 141    image include and library files if using /usr/bin/gcc.  That
 142    compiler seems to be modified to not find headers in
 143    /usr/local/include or libs in /usr/local/lib by default.  */
 144
 145 #define C_SWITCH_SYSTEM -I/usr/X11R6/include -I/usr/local/include -L/usr/local/lib
 146
 147 /* Circumvent a bug in FreeBSD.  In the following sequence of
 148    writes/reads on a PTY, read(2) returns bogus data:
 149
 150    write(2)  1022 bytes
 151    write(2)   954 bytes, get EAGAIN
 152    read(2)   1024 bytes in process_read_output
 153    read(2)     11 bytes in process_read_output
 154
 155    That is, read(2) returns more bytes than have ever been written
 156    successfully.  The 1033 bytes read are the 1022 bytes written
 157    successfully after processing (for example with CRs added if the
 158    terminal is set up that way which it is here).  The same bytes will
 159    be seen again in a later read(2), without the CRs.  */
 160
 161 #define BROKEN_PTY_READ_AFTER_EAGAIN 1
 162
 163 /* Tell that garbage collector that setjmp is known to save all
 164    registers relevant for conservative garbage collection in the
 165    jmp_buf.  */
 166
 167 #define GC_SETJMP_WORKS 1
 168
 169 /* Use the GC_MAKE_GCPROS_NOOPS (see lisp.h) method for marking the
 170    stack.  */
 171
 172 #define GC_MARK_STACK   GC_MAKE_GCPROS_NOOPS
 173
 174 /* Define USE_MMAP_FOR_BUFFERS to let Emacs use mmap(2) to allocate
 175    buffer text.  This overrides REL_ALLOC.  */
 176
 177 #define USE_MMAP_FOR_BUFFERS    1
 178
 179 /* Use sigprocmask(2) and friends instead of sigblock(2); the man page
 180    of sigblock says it is obsolete.  */
 181
 182 #define POSIX_SIGNALS           1
 183
 184 /* The `combreloc' setting became the default, and it seems to be
 185    incompatible with unexec.  Symptom is an immediate SEGV in
 186    XtInitializeWidget when starting Emacs under X11.  */
 187
 188 #if defined __FreeBSD_version && __FreeBSD_version >= 500042
 189 #define LD_SWITCH_SYSTEM_TEMACS -znocombreloc
 190 #endif
 191
 192 /* arch-tag: 426529ca-b7c4-448f-b10a-d4dcdc9c78eb
 193    (do not change this comment) */