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 of the License, or
  13 (at your option) 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.  If not, see <http://www.gnu.org/licenses/>.  */
  22
  23 /* Get the correct __FreeBSD_version, even if this is before that was
  24    defined. */
  25 #ifndef __FreeBSD_version
  26 #ifndef __FreeBSD__
  27 #define __FreeBSD_version 199401
  28 #elif __FreeBSD__ == 1
  29 #define __FreeBSD_version 199405
  30 #else
  31 #include <osreldate.h>
  32 #endif
  33 #endif /* !defined __FreeBSD_version */
  34
  35 /* '__FreeBSD__' is defined by the preprocessor on FreeBSD-1.1 and up.
  36    Earlier versions do not have shared libraries, so inhibit them.
  37    You can inhibit them on newer systems if you wish
  38    by defining NO_SHARED_LIBS.  */
  39 #ifndef __FreeBSD__
  40 #define NO_SHARED_LIBS
  41 #endif
  42
  43 /* Get most of the stuff from bsd-common */
  44 #include "bsd-common.h"
  45
  46 /* For mem-limits.h. */
  47 #define BSD4_2
  48
  49 /* These aren't needed, since we have getloadavg.  */
  50 #undef KERNEL_FILE
  51 #undef LDAV_SYMBOL
  52
  53 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_p - (FILE)->_bf._base)
  54
  55 #define LIBS_DEBUG
  56 #define LIBS_SYSTEM -lutil
  57 #if __FreeBSD_version < 400000
  58 #define LIBS_TERMCAP -ltermcap
  59 #else
  60 #define TERMINFO
  61 #define LIBS_TERMCAP -lncurses
  62 #endif
  63
  64 #define SYSV_SYSTEM_DIR
  65
  66 /* freebsd has POSIX-style pgrp behavior. */
  67 #undef BSD_PGRPS
  68
  69 #ifdef __ELF__
  70
  71 #define LD_SWITCH_SYSTEM_1
  72 #define START_FILES pre-crt0.o /usr/lib/crt1.o /usr/lib/crti.o /usr/lib/crtbegin.o
  73 #define UNEXEC unexelf.o
  74 #define LIB_STANDARD -lgcc -lc -lgcc /usr/lib/crtend.o /usr/lib/crtn.o
  75 #undef LIB_GCC
  76 #define LIB_GCC
  77
  78 #else /* not __ELF__ */
  79
  80 #ifndef NO_SHARED_LIBS
  81 #define LD_SWITCH_SYSTEM_1 -e start -dc -L/usr/local/lib
  82 #define HAVE_TEXT_START         /* No need to define `start_of_text'. */
  83 #if __FreeBSD_version >= 300002
  84 #define START_FILES pre-crt0.o /usr/lib/aout/crt0.o
  85 #else /* __FreeBSD_version < 300002 */
  86 #define START_FILES pre-crt0.o /usr/lib/crt0.o
  87 #endif /* __FreeBSD_version < 300002 */
  88 #define UNEXEC unexsunos4.o
  89 #define RUN_TIME_REMAP
  90 #define LIB_GCC -lgcc
  91
  92 #else /* NO_SHARED_LIBS */
  93 #ifdef __FreeBSD__  /* shared libs are available, but the user prefers
  94                      not to use them.  */
  95 #define LD_SWITCH_SYSTEM_1 -Bstatic -L/usr/local/lib
  96 #define A_TEXT_OFFSET(x) (sizeof (struct exec))
  97 #define A_TEXT_SEEK(hdr) (N_TXTOFF(hdr) + A_TEXT_OFFSET(hdr))
  98 #endif /* __FreeBSD__ */
  99 #endif /* NO_SHARED_LIBS */
 100
 101 #endif /* not __ELF__ */
 102
 103 /* Let `ld' find image libs and similar things in /usr/local/lib.  The
 104    system compiler, GCC, has apparently been modified to not look
 105    there, contrary to what a stock GCC would do.  */
 106
 107 #define LD_SWITCH_SYSTEM LD_SWITCH_SYSTEM_1 -L/usr/local/lib
 108
 109 #define HAVE_GETLOADAVG 1
 110 #define HAVE_TERMIOS
 111 #define NO_TERMIO
 112 #define DECLARE_GETPWUID_WITH_UID_T
 113
 114 /* freebsd uses OXTABS instead of the expected TAB3. */
 115 #define TABDLY OXTABS
 116 #define TAB3 OXTABS
 117
 118 /* this silences a few compilation warnings */
 119 #undef BSD_SYSTEM
 120 #if __FreeBSD__ == 1
 121 #define BSD_SYSTEM 199103
 122 #elif __FreeBSD__ == 2
 123 #define BSD_SYSTEM 199306
 124 #elif __FreeBSD__ >= 3
 125 #define BSD_SYSTEM 199506
 126 #endif
 127
 128 /* Don't close pty in process.c to make it as controlling terminal.
 129    It is already a controlling terminal of subprocess, because we did
 130    ioctl TIOCSCTTY.  */
 131 #define DONT_REOPEN_PTY
 132
 133 /* If the system's imake configuration file defines `NeedWidePrototypes'
 134    as `NO', we must define NARROWPROTO manually.  Such a define is
 135    generated in the Makefile generated by `xmkmf'.  If we don't
 136    define NARROWPROTO, we will see the wrong function prototypes
 137    for X functions taking float or double parameters.  */
 138
 139 #define NARROWPROTO 1
 140
 141 /* The following is needed to make `configure' find Xpm, Xaw3d and
 142    image include and library files if using /usr/bin/gcc.  That
 143    compiler seems to be modified to not find headers in
 144    /usr/local/include or libs in /usr/local/lib by default.  */
 145
 146 #define C_SWITCH_SYSTEM -I/usr/X11R6/include -I/usr/local/include -L/usr/local/lib
 147
 148 /* Circumvent a bug in FreeBSD.  In the following sequence of
 149    writes/reads on a PTY, read(2) returns bogus data:
 150
 151    write(2)  1022 bytes
 152    write(2)   954 bytes, get EAGAIN
 153    read(2)   1024 bytes in process_read_output
 154    read(2)     11 bytes in process_read_output
 155
 156    That is, read(2) returns more bytes than have ever been written
 157    successfully.  The 1033 bytes read are the 1022 bytes written
 158    successfully after processing (for example with CRs added if the
 159    terminal is set up that way which it is here).  The same bytes will
 160    be seen again in a later read(2), without the CRs.  */
 161
 162 #define BROKEN_PTY_READ_AFTER_EAGAIN 1
 163
 164 /* Tell that garbage collector that setjmp is known to save all
 165    registers relevant for conservative garbage collection in the
 166    jmp_buf.  */
 167
 168 #define GC_SETJMP_WORKS 1
 169
 170 /* Use the GC_MAKE_GCPROS_NOOPS (see lisp.h) method for marking the
 171    stack.  */
 172
 173 #define GC_MARK_STACK   GC_MAKE_GCPROS_NOOPS
 174
 175 /* Define USE_MMAP_FOR_BUFFERS to let Emacs use mmap(2) to allocate
 176    buffer text.  This overrides REL_ALLOC.  */
 177
 178 #define USE_MMAP_FOR_BUFFERS    1
 179
 180 /* Use sigprocmask(2) and friends instead of sigblock(2); the man page
 181    of sigblock says it is obsolete.  */
 182
 183 #define POSIX_SIGNALS           1
 184
 185 /* The `combreloc' setting became the default, and it seems to be
 186    incompatible with unexec.  Symptom is an immediate SEGV in
 187    XtInitializeWidget when starting Emacs under X11.  */
 188
 189 #if defined __FreeBSD_version && __FreeBSD_version >= 500042
 190 #define LD_SWITCH_SYSTEM_TEMACS -znocombreloc
 191 #endif
 192
 193 /* arch-tag: 426529ca-b7c4-448f-b10a-d4dcdc9c78eb
 194    (do not change this comment) */