src/s/freebsd.h

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