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
   5    Free Software Foundation, Inc.
   6
   7 This file is part of GNU Emacs.
   8
   9 GNU Emacs is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 2, or (at your option)
  12 any later version.
  13
  14 GNU Emacs is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with GNU Emacs; see the file COPYING.  If not, write to
  21 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  22 Boston, MA 02111-1307, USA.  */
  23
  24 /* Get the correct __FreeBSD_version, even if this is before that was
  25    defined. */
  26 #ifndef __FreeBSD_version
  27 #ifndef __FreeBSD__
  28 #define __FreeBSD_version 199401
  29 #elif __FreeBSD__ == 1
  30 #define __FreeBSD_version 199405
  31 #else
  32 #include <osreldate.h>
  33 #endif
  34 #endif /* !defined __FreeBSD_version */
  35
  36 /* '__FreeBSD__' is defined by the preprocessor on FreeBSD-1.1 and up.
  37    Earlier versions do not have shared libraries, so inhibit them.
  38    You can inhibit them on newer systems if you wish
  39    by defining NO_SHARED_LIBS.  */
  40 #ifndef __FreeBSD__
  41 #define NO_SHARED_LIBS
  42 #endif
  43
  44
  45 #if 0 /* This much, alone, seemed sufficient as of 19.23.
  46          But it seems better to be independent of netbsd.h.  */
  47 #include "netbsd.h"
  48
  49 #undef LIB_GCC
  50 #define LIB_GCC -lgcc
  51 #undef NEED_ERRNO
  52 #endif /* 0 */
  53
  54
  55 /* Get most of the stuff from bsd4.3 */
  56 #include "bsd4-3.h"
  57
  58 /* For mem-limits.h. */
  59 #define BSD4_2
  60
  61 /* These aren't needed, since we have getloadavg.  */
  62 #undef KERNEL_FILE
  63 #undef LDAV_SYMBOL
  64
  65 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_p - (FILE)->_bf._base)
  66
  67 #define LIBS_DEBUG
  68 #define LIBS_SYSTEM -lutil
  69 #if __FreeBSD_version < 400000
  70 #define LIBS_TERMCAP -ltermcap
  71 #endif
  72
  73 #define SYSV_SYSTEM_DIR
  74
  75 /* freebsd has POSIX-style pgrp behavior. */
  76 #undef BSD_PGRPS
  77 #define GETPGRP_NO_ARG
  78
  79 #ifdef __ELF__
  80
  81 #define LD_SWITCH_SYSTEM_1
  82 #define START_FILES pre-crt0.o /usr/lib/crt1.o /usr/lib/crti.o /usr/lib/crtbegin.o
  83 #define UNEXEC unexelf.o
  84 #define LIB_STANDARD -lgcc -lc -lgcc /usr/lib/crtend.o /usr/lib/crtn.o
  85 #undef LIB_GCC
  86 #define LIB_GCC
  87
  88 #else /* not __ELF__ */
  89
  90 #ifndef NO_SHARED_LIBS
  91 #define LD_SWITCH_SYSTEM_1 -e start -dc -L/usr/local/lib
  92 #define HAVE_TEXT_START         /* No need to define `start_of_text'. */
  93 #if __FreeBSD_version >= 300002
  94 #define START_FILES pre-crt0.o /usr/lib/aout/crt0.o
  95 #else /* __FreeBSD_version < 300002 */
  96 #define START_FILES pre-crt0.o /usr/lib/crt0.o
  97 #endif /* __FreeBSD_version < 300002 */
  98 #define UNEXEC unexsunos4.o
  99 #define RUN_TIME_REMAP
 100 #define LIB_GCC -lgcc
 101
 102 #ifndef N_TRELOFF
 103 #define N_PAGSIZ(x) __LDPGSZ
 104 #define N_BSSADDR(x) (N_ALIGN(x, N_DATADDR(x)+x.a_data))
 105 #define N_TRELOFF(x) N_RELOFF(x)
 106 #endif
 107 #else /* NO_SHARED_LIBS */
 108 #ifdef __FreeBSD__  /* shared libs are available, but the user prefers
 109                      not to use them.  */
 110 #define LD_SWITCH_SYSTEM_1 -Bstatic -L/usr/local/lib
 111 #define A_TEXT_OFFSET(x) (sizeof (struct exec))
 112 #define A_TEXT_SEEK(hdr) (N_TXTOFF(hdr) + A_TEXT_OFFSET(hdr))
 113 #endif /* __FreeBSD__ */
 114 #endif /* NO_SHARED_LIBS */
 115
 116 #endif /* not __ELF__ */
 117
 118 /* Let `ld' find image libs and similar things in /usr/local/lib.  The
 119    system compiler, GCC, has apparently been modified to not look
 120    there, contrary to what a stock GCC would do.  */
 121
 122 #define LD_SWITCH_SYSTEM LD_SWITCH_SYSTEM_1 -L/usr/local/lib
 123
 124 #define HAVE_WAIT_HEADER
 125 #define HAVE_GETLOADAVG 1
 126 #if 0
 127 #define HAVE_GETPAGESIZE  /* configure now puts this in config.h */
 128 #endif
 129 #define HAVE_TERMIOS
 130 #define NO_TERMIO
 131 #define DECLARE_GETPWUID_WITH_UID_T
 132
 133 /* freebsd uses OXTABS instead of the expected TAB3. */
 134 #define TABDLY OXTABS
 135 #define TAB3 OXTABS
 136
 137 /* this silences a few compilation warnings */
 138 #undef BSD_SYSTEM
 139 #if __FreeBSD__ == 1
 140 #define BSD_SYSTEM 199103
 141 #elif __FreeBSD__ == 2
 142 #define BSD_SYSTEM 199306
 143 #elif __FreeBSD__ >= 3
 144 #define BSD_SYSTEM 199506
 145 #endif
 146
 147 #if 0  /* Shouldn't be necessary and produces warnings with the
 148           experimental Autoconf test.  */
 149 #define WAITTYPE int
 150 /* get this since it won't be included if WAITTYPE is defined */
 151 #ifdef emacs
 152 #include <sys/wait.h>
 153 #endif
 154 #define WRETCODE(w) (_W_INT(w) >> 8)
 155 #endif
 156
 157 /* Needed to avoid hanging when child process writes an error message
 158    and exits -- enami tsugutomo <enami@ba2.so-net.or.jp>.  */
 159 #define vfork fork
 160
 161 /* Don't close pty in process.c to make it as controlling terminal.
 162    It is already a controlling terminal of subprocess, because we did
 163    ioctl TIOCSCTTY.  */
 164 #define DONT_REOPEN_PTY
 165
 166 /* CLASH_DETECTION is defined in bsd4-3.h.
 167    In FreeBSD 2.1.5 (and other 2.1.x), this results useless symbolic links
 168    remaining in /tmp or other directories with +t bit.
 169    To avoid this problem, you could #undef it to use no file lock. */
 170 /* #undef CLASH_DETECTION */
 171
 172 /* If the system's imake configuration file defines `NeedWidePrototypes'
 173    as `NO', we must define NARROWPROTO manually.  Such a define is
 174    generated in the Makefile generated by `xmkmf'.  If we don't
 175    define NARROWPROTO, we will see the wrong function prototypes
 176    for X functions taking float or double parameters.  */
 177
 178 #define NARROWPROTO 1
 179
 180 /* The following is needed to make `configure' find Xpm, Xaw3d and
 181    image include and library files if using /usr/bin/gcc.  That
 182    compiler seems to be modified to not find headers in
 183    /usr/local/include or libs in /usr/local/lib by default.  */
 184
 185 #define C_SWITCH_SYSTEM -I/usr/X11R6/include -I/usr/local/include -L/usr/local/lib
 186
 187 /* Circumvent a bug in FreeBSD.  In the following sequence of
 188    writes/reads on a PTY, read(2) returns bogus data:
 189
 190    write(2)  1022 bytes
 191    write(2)   954 bytes, get EAGAIN
 192    read(2)   1024 bytes in process_read_output
 193    read(2)     11 bytes in process_read_output
 194
 195    That is, read(2) returns more bytes than have ever been written
 196    successfully.  The 1033 bytes read are the 1022 bytes written
 197    successfully after processing (for example with CRs added if the
 198    terminal is set up that way which it is here).  The same bytes will
 199    be seen again in a later read(2), without the CRs.  */
 200
 201 #define BROKEN_PTY_READ_AFTER_EAGAIN 1
 202
 203 /* Tell that garbage collector that setjmp is known to save all
 204    registers relevant for conservative garbage collection in the
 205    jmp_buf.  */
 206
 207 #define GC_SETJMP_WORKS 1
 208
 209 /* Use the GC_MAKE_GCPROS_NOOPS (see lisp.h) method for marking the
 210    stack.  */
 211
 212 #define GC_MARK_STACK   GC_MAKE_GCPROS_NOOPS
 213
 214 /* Define USE_MMAP_FOR_BUFFERS to let Emacs use mmap(2) to allocate
 215    buffer text.  This overrides REL_ALLOC.  */
 216
 217 #define USE_MMAP_FOR_BUFFERS    1
 218
 219 /* Use sigprocmask(2) and friends instead of sigblock(2); the man page
 220    of sigblock says it is obsolete.  */
 221
 222 #define POSIX_SIGNALS           1