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
   6                  Free Software Foundation, Inc.
   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, or (at your option)
  13 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; see the file COPYING.  If not, write to
  22 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  23 Boston, MA 02110-1301, USA.  */
  24
  25 /* Get the correct __FreeBSD_version, even if this is before that was
  26    defined. */
  27 #ifndef __FreeBSD_version
  28 #ifndef __FreeBSD__
  29 #define __FreeBSD_version 199401
  30 #elif __FreeBSD__ == 1
  31 #define __FreeBSD_version 199405
  32 #else
  33 #include <osreldate.h>
  34 #endif
  35 #endif /* !defined __FreeBSD_version */
  36
  37 /* '__FreeBSD__' is defined by the preprocessor on FreeBSD-1.1 and up.
  38    Earlier versions do not have shared libraries, so inhibit them.
  39    You can inhibit them on newer systems if you wish
  40    by defining NO_SHARED_LIBS.  */
  41 #ifndef __FreeBSD__
  42 #define NO_SHARED_LIBS
  43 #endif
  44
  45
  46 #if 0 /* This much, alone, seemed sufficient as of 19.23.
  47          But it seems better to be independent of netbsd.h.  */
  48 #include "netbsd.h"
  49
  50 #undef LIB_GCC
  51 #define LIB_GCC -lgcc
  52 #undef NEED_ERRNO
  53 #endif /* 0 */
  54
  55
  56 /* Get most of the stuff from bsd4.3 */
  57 #include "bsd4-3.h"
  58
  59 /* For mem-limits.h. */
  60 #define BSD4_2
  61
  62 /* These aren't needed, since we have getloadavg.  */
  63 #undef KERNEL_FILE
  64 #undef LDAV_SYMBOL
  65
  66 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_p - (FILE)->_bf._base)
  67
  68 #define LIBS_DEBUG
  69 #define LIBS_SYSTEM -lutil
  70 #if __FreeBSD_version < 400000
  71 #define LIBS_TERMCAP -ltermcap
  72 #else
  73 #define TERMINFO
  74 #define LIBS_TERMCAP -lncurses
  75 #endif
  76
  77 #define SYSV_SYSTEM_DIR
  78
  79 /* freebsd has POSIX-style pgrp behavior. */
  80 #undef BSD_PGRPS
  81 #define GETPGRP_NO_ARG
  82
  83 #ifdef __ELF__
  84
  85 #define LD_SWITCH_SYSTEM_1
  86 #define START_FILES pre-crt0.o /usr/lib/crt1.o /usr/lib/crti.o /usr/lib/crtbegin.o
  87 #define UNEXEC unexelf.o
  88 #define LIB_STANDARD -lgcc -lc -lgcc /usr/lib/crtend.o /usr/lib/crtn.o
  89 #undef LIB_GCC
  90 #define LIB_GCC
  91
  92 #else /* not __ELF__ */
  93
  94 #ifndef NO_SHARED_LIBS
  95 #define LD_SWITCH_SYSTEM_1 -e start -dc -L/usr/local/lib
  96 #define HAVE_TEXT_START         /* No need to define `start_of_text'. */
  97 #if __FreeBSD_version >= 300002
  98 #define START_FILES pre-crt0.o /usr/lib/aout/crt0.o
  99 #else /* __FreeBSD_version < 300002 */
 100 #define START_FILES pre-crt0.o /usr/lib/crt0.o
 101 #endif /* __FreeBSD_version < 300002 */
 102 #define UNEXEC unexsunos4.o
 103 #define RUN_TIME_REMAP
 104 #define LIB_GCC -lgcc
 105
 106 #ifndef N_TRELOFF
 107 #define N_PAGSIZ(x) __LDPGSZ
 108 #define N_BSSADDR(x) (N_ALIGN(x, N_DATADDR(x)+x.a_data))
 109 #define N_TRELOFF(x) N_RELOFF(x)
 110 #endif
 111 #else /* NO_SHARED_LIBS */
 112 #ifdef __FreeBSD__  /* shared libs are available, but the user prefers
 113                      not to use them.  */
 114 #define LD_SWITCH_SYSTEM_1 -Bstatic -L/usr/local/lib
 115 #define A_TEXT_OFFSET(x) (sizeof (struct exec))
 116 #define A_TEXT_SEEK(hdr) (N_TXTOFF(hdr) + A_TEXT_OFFSET(hdr))
 117 #endif /* __FreeBSD__ */
 118 #endif /* NO_SHARED_LIBS */
 119
 120 #endif /* not __ELF__ */
 121
 122 /* Let `ld' find image libs and similar things in /usr/local/lib.  The
 123    system compiler, GCC, has apparently been modified to not look
 124    there, contrary to what a stock GCC would do.  */
 125
 126 #define LD_SWITCH_SYSTEM LD_SWITCH_SYSTEM_1 -L/usr/local/lib
 127
 128 #define HAVE_WAIT_HEADER
 129 #define HAVE_GETLOADAVG 1
 130 #if 0
 131 #define HAVE_GETPAGESIZE  /* configure now puts this in config.h */
 132 #endif
 133 #define HAVE_TERMIOS
 134 #define NO_TERMIO
 135 #define DECLARE_GETPWUID_WITH_UID_T
 136
 137 /* freebsd uses OXTABS instead of the expected TAB3. */
 138 #define TABDLY OXTABS
 139 #define TAB3 OXTABS
 140
 141 /* this silences a few compilation warnings */
 142 #undef BSD_SYSTEM
 143 #if __FreeBSD__ == 1
 144 #define BSD_SYSTEM 199103
 145 #elif __FreeBSD__ == 2
 146 #define BSD_SYSTEM 199306
 147 #elif __FreeBSD__ >= 3
 148 #define BSD_SYSTEM 199506
 149 #endif
 150
 151 #if 0  /* Shouldn't be necessary and produces warnings with the
 152           experimental Autoconf test.  */
 153 #define WAITTYPE int
 154 /* get this since it won't be included if WAITTYPE is defined */
 155 #ifdef emacs
 156 #include <sys/wait.h>
 157 #endif
 158 #define WRETCODE(w) (_W_INT(w) >> 8)
 159 #endif
 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
 223
 224 /* The `combreloc' setting became the default, and it seems to be
 225    incompatible with unexec.  Symptom is an immediate SEGV in
 226    XtInitializeWidget when starting Emacs under X11.  */
 227
 228 #if defined __FreeBSD_version && __FreeBSD_version >= 500042
 229 #define LD_SWITCH_SYSTEM_TEMACS -znocombreloc
 230 #endif
 231
 232 /* arch-tag: 426529ca-b7c4-448f-b10a-d4dcdc9c78eb
 233    (do not change this comment) */