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 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., 51 Franklin Street, Fifth Floor,
  22 Boston, MA 02110-1301, 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 #else
  72 #define TERMINFO
  73 #define LIBS_TERMCAP -lncurses
  74 #endif
  75
  76 #define SYSV_SYSTEM_DIR
  77
  78 /* freebsd has POSIX-style pgrp behavior. */
  79 #undef BSD_PGRPS
  80 #define GETPGRP_NO_ARG
  81
  82 #ifdef __ELF__
  83
  84 #define LD_SWITCH_SYSTEM_1
  85 #define START_FILES pre-crt0.o /usr/lib/crt1.o /usr/lib/crti.o /usr/lib/crtbegin.o
  86 #define UNEXEC unexelf.o
  87 #define LIB_STANDARD -lgcc -lc -lgcc /usr/lib/crtend.o /usr/lib/crtn.o
  88 #undef LIB_GCC
  89 #define LIB_GCC
  90
  91 #else /* not __ELF__ */
  92
  93 #ifndef NO_SHARED_LIBS
  94 #define LD_SWITCH_SYSTEM_1 -e start -dc -L/usr/local/lib
  95 #define HAVE_TEXT_START         /* No need to define `start_of_text'. */
  96 #if __FreeBSD_version >= 300002
  97 #define START_FILES pre-crt0.o /usr/lib/aout/crt0.o
  98 #else /* __FreeBSD_version < 300002 */
  99 #define START_FILES pre-crt0.o /usr/lib/crt0.o
 100 #endif /* __FreeBSD_version < 300002 */
 101 #define UNEXEC unexsunos4.o
 102 #define RUN_TIME_REMAP
 103 #define LIB_GCC -lgcc
 104
 105 #ifndef N_TRELOFF
 106 #define N_PAGSIZ(x) __LDPGSZ
 107 #define N_BSSADDR(x) (N_ALIGN(x, N_DATADDR(x)+x.a_data))
 108 #define N_TRELOFF(x) N_RELOFF(x)
 109 #endif
 110 #else /* NO_SHARED_LIBS */
 111 #ifdef __FreeBSD__  /* shared libs are available, but the user prefers
 112                      not to use them.  */
 113 #define LD_SWITCH_SYSTEM_1 -Bstatic -L/usr/local/lib
 114 #define A_TEXT_OFFSET(x) (sizeof (struct exec))
 115 #define A_TEXT_SEEK(hdr) (N_TXTOFF(hdr) + A_TEXT_OFFSET(hdr))
 116 #endif /* __FreeBSD__ */
 117 #endif /* NO_SHARED_LIBS */
 118
 119 #endif /* not __ELF__ */
 120
 121 /* Let `ld' find image libs and similar things in /usr/local/lib.  The
 122    system compiler, GCC, has apparently been modified to not look
 123    there, contrary to what a stock GCC would do.  */
 124
 125 #define LD_SWITCH_SYSTEM LD_SWITCH_SYSTEM_1 -L/usr/local/lib
 126
 127 #define HAVE_WAIT_HEADER
 128 #define HAVE_GETLOADAVG 1
 129 #if 0
 130 #define HAVE_GETPAGESIZE  /* configure now puts this in config.h */
 131 #endif
 132 #define HAVE_TERMIOS
 133 #define NO_TERMIO
 134 #define DECLARE_GETPWUID_WITH_UID_T
 135
 136 /* freebsd uses OXTABS instead of the expected TAB3. */
 137 #define TABDLY OXTABS
 138 #define TAB3 OXTABS
 139
 140 /* this silences a few compilation warnings */
 141 #undef BSD_SYSTEM
 142 #if __FreeBSD__ == 1
 143 #define BSD_SYSTEM 199103
 144 #elif __FreeBSD__ == 2
 145 #define BSD_SYSTEM 199306
 146 #elif __FreeBSD__ >= 3
 147 #define BSD_SYSTEM 199506
 148 #endif
 149
 150 #if 0  /* Shouldn't be necessary and produces warnings with the
 151           experimental Autoconf test.  */
 152 #define WAITTYPE int
 153 /* get this since it won't be included if WAITTYPE is defined */
 154 #ifdef emacs
 155 #include <sys/wait.h>
 156 #endif
 157 #define WRETCODE(w) (_W_INT(w) >> 8)
 158 #endif
 159
 160 /* Don't close pty in process.c to make it as controlling terminal.
 161    It is already a controlling terminal of subprocess, because we did
 162    ioctl TIOCSCTTY.  */
 163 #define DONT_REOPEN_PTY
 164
 165 /* CLASH_DETECTION is defined in bsd4-3.h.
 166    In FreeBSD 2.1.5 (and other 2.1.x), this results useless symbolic links
 167    remaining in /tmp or other directories with +t bit.
 168    To avoid this problem, you could #undef it to use no file lock. */
 169 /* #undef CLASH_DETECTION */
 170
 171 /* If the system's imake configuration file defines `NeedWidePrototypes'
 172    as `NO', we must define NARROWPROTO manually.  Such a define is
 173    generated in the Makefile generated by `xmkmf'.  If we don't
 174    define NARROWPROTO, we will see the wrong function prototypes
 175    for X functions taking float or double parameters.  */
 176
 177 #define NARROWPROTO 1
 178
 179 /* The following is needed to make `configure' find Xpm, Xaw3d and
 180    image include and library files if using /usr/bin/gcc.  That
 181    compiler seems to be modified to not find headers in
 182    /usr/local/include or libs in /usr/local/lib by default.  */
 183
 184 #define C_SWITCH_SYSTEM -I/usr/X11R6/include -I/usr/local/include -L/usr/local/lib
 185
 186 /* Circumvent a bug in FreeBSD.  In the following sequence of
 187    writes/reads on a PTY, read(2) returns bogus data:
 188
 189    write(2)  1022 bytes
 190    write(2)   954 bytes, get EAGAIN
 191    read(2)   1024 bytes in process_read_output
 192    read(2)     11 bytes in process_read_output
 193
 194    That is, read(2) returns more bytes than have ever been written
 195    successfully.  The 1033 bytes read are the 1022 bytes written
 196    successfully after processing (for example with CRs added if the
 197    terminal is set up that way which it is here).  The same bytes will
 198    be seen again in a later read(2), without the CRs.  */
 199
 200 #define BROKEN_PTY_READ_AFTER_EAGAIN 1
 201
 202 /* Tell that garbage collector that setjmp is known to save all
 203    registers relevant for conservative garbage collection in the
 204    jmp_buf.  */
 205
 206 #define GC_SETJMP_WORKS 1
 207
 208 /* Use the GC_MAKE_GCPROS_NOOPS (see lisp.h) method for marking the
 209    stack.  */
 210
 211 #define GC_MARK_STACK   GC_MAKE_GCPROS_NOOPS
 212
 213 /* Define USE_MMAP_FOR_BUFFERS to let Emacs use mmap(2) to allocate
 214    buffer text.  This overrides REL_ALLOC.  */
 215
 216 #define USE_MMAP_FOR_BUFFERS    1
 217
 218 /* Use sigprocmask(2) and friends instead of sigblock(2); the man page
 219    of sigblock says it is obsolete.  */
 220
 221 #define POSIX_SIGNALS           1
 222
 223 /* The `combreloc' setting became the default, and it seems to be
 224    incompatible with unexec.  Symptom is an immediate SEGV in
 225    XtInitializeWidget when starting Emacs under X11.  */
 226
 227 #if defined __FreeBSD_version && __FreeBSD_version >= 500042
 228 #define LD_SWITCH_SYSTEM_TEMACS -znocombreloc
 229 #endif
 230
 231 /* arch-tag: 426529ca-b7c4-448f-b10a-d4dcdc9c78eb
 232    (do not change this comment) */