gcc/config/svr4.h

   1 /* Operating system specific defines to be used when targeting GCC for some
   2    generic System V Release 4 system.
   3    Copyright (C) 1991, 1994, 1995, 1996, 1997, 1998, 1999,
   4    2000 Free Software Foundation, Inc.
   5    Contributed by Ron Guilmette (rfg@monkeys.com).
   6
   7 This file is part of GNU CC.
   8
   9 GNU CC 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 CC 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 CC; see the file COPYING.  If not, write to
  21 the Free Software Foundation, 59 Temple Place - Suite 330,
  22 Boston, MA 02111-1307, USA.
  23
  24    To use this file, make up a file with a name like:
  25
  26         ?????svr4.h
  27
  28    where ????? is replaced by the name of the basic hardware that you
  29    are targeting for.  Then, in the file ?????svr4.h, put something
  30    like:
  31
  32         #include "?????.h"
  33         #include "svr4.h"
  34
  35    followed by any really system-specific defines (or overrides of
  36    defines) which you find that you need.  For example, CPP_PREDEFINES
  37    is defined here with only the defined -Dunix and -DSVR4.  You should
  38    probably override that in your target-specific ?????svr4.h file
  39    with a set of defines that includes these, but also contains an
  40    appropriate define for the type of hardware that you are targeting.
  41 */
  42
  43 /* Define a symbol indicating that we are using svr4.h.  */
  44 #define USING_SVR4_H
  45
  46 #include "elfos.h"
  47
  48 /* Cpp, assembler, linker, library, and startfile spec's.  */
  49
  50 /* This defines which switch letters take arguments.  On svr4, most of
  51    the normal cases (defined in gcc.c) apply, and we also have -h* and
  52    -z* options (for the linker).  Note however that there is no such
  53    thing as a -T option for svr4.  */
  54
  55 #define SWITCH_TAKES_ARG(CHAR)          \
  56   (DEFAULT_SWITCH_TAKES_ARG (CHAR)      \
  57    || (CHAR) == 'h'                     \
  58    || (CHAR) == 'x'                     \
  59    || (CHAR) == 'z')
  60
  61 /* This defines which multi-letter switches take arguments.  On svr4,
  62    there are no such switches except those implemented by GCC itself.  */
  63
  64 #define WORD_SWITCH_TAKES_ARG(STR)                      \
  65  (DEFAULT_WORD_SWITCH_TAKES_ARG (STR)                   \
  66   && strcmp (STR, "Tdata") && strcmp (STR, "Ttext")     \
  67   && strcmp (STR, "Tbss"))
  68
  69 /* You should redefine CPP_PREDEFINES in any file which includes this one.
  70    The definition should be appropriate for the type of target system
  71    involved, and it should include any -A (assertion) options which are
  72    appropriate for the given target system.  */
  73 #undef CPP_PREDEFINES
  74
  75 /* Provide an ASM_SPEC appropriate for svr4.  Here we try to support as
  76    many of the specialized svr4 assembler options as seems reasonable,
  77    given that there are certain options which we can't (or shouldn't)
  78    support directly due to the fact that they conflict with other options
  79    for other svr4 tools (e.g. ld) or with other options for GCC itself.
  80    For example, we don't support the -o (output file) or -R (remove
  81    input file) options because GCC already handles these things.  We
  82    also don't support the -m (run m4) option for the assembler because
  83    that conflicts with the -m (produce load map) option of the svr4
  84    linker.  We do however allow passing arbitrary options to the svr4
  85    assembler via the -Wa, option.
  86
  87    Note that gcc doesn't allow a space to follow -Y in a -Ym,* or -Yd,*
  88    option.
  89 */
  90
  91 #undef  ASM_SPEC
  92 #define ASM_SPEC \
  93   "%{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"
  94
  95 /* svr4 assemblers need the `-' (indicating input from stdin) to come after
  96    the -o option (and its argument) for some reason.  If we try to put it
  97    before the -o option, the assembler will try to read the file named as
  98    the output file in the -o option as an input file (after it has already
  99    written some stuff to it) and the binary stuff contained therein will
 100    cause totally confuse the assembler, resulting in many spurious error
 101    messages.  */
 102
 103 #undef  ASM_FINAL_SPEC
 104 #define ASM_FINAL_SPEC "%|"
 105
 106 /* Under svr4, the normal location of the `ld' and `as' programs is the
 107    /usr/ccs/bin directory.  */
 108
 109 #ifndef CROSS_COMPILE
 110 #undef  MD_EXEC_PREFIX
 111 #define MD_EXEC_PREFIX "/usr/ccs/bin/"
 112 #endif
 113
 114 /* Under svr4, the normal location of the various *crt*.o files is the
 115    /usr/ccs/lib directory.  */
 116
 117 #ifndef CROSS_COMPILE
 118 #undef  MD_STARTFILE_PREFIX
 119 #define MD_STARTFILE_PREFIX "/usr/ccs/lib/"
 120 #endif
 121
 122 /* Provide a LIB_SPEC appropriate for svr4.  Here we tack on the default
 123    standard C library (unless we are building a shared library).  */
 124
 125 #undef  LIB_SPEC
 126 #define LIB_SPEC "%{!shared:%{!symbolic:-lc}}"
 127
 128 /* Provide an ENDFILE_SPEC appropriate for svr4.  Here we tack on our own
 129    magical crtend.o file (see crtstuff.c) which provides part of the
 130    support for getting C++ file-scope static object constructed before
 131    entering `main', followed by the normal svr3/svr4 "finalizer" file,
 132    which is either `gcrtn.o' or `crtn.o'.  */
 133
 134 #undef  ENDFILE_SPEC
 135 #define ENDFILE_SPEC "crtend.o%s %{pg:gcrtn.o%s}%{!pg:crtn.o%s}"
 136
 137 /* Provide a LINK_SPEC appropriate for svr4.  Here we provide support
 138    for the special GCC options -static, -shared, and -symbolic which
 139    allow us to link things in one of these three modes by applying the
 140    appropriate combinations of options at link-time.  We also provide
 141    support here for as many of the other svr4 linker options as seems
 142    reasonable, given that some of them conflict with options for other
 143    svr4 tools (e.g. the assembler).  In particular, we do support the
 144    -z*, -V, -b, -t, -Qy, -Qn, and -YP* options here, and the -e*, -l*,
 145    -o*, -r, -s, -u*, and -L* options are directly supported by gcc.c
 146    itself.  We don't directly support the -m (generate load map)
 147    option because that conflicts with the -m (run m4) option of the
 148    svr4 assembler.  We also don't directly support the svr4 linker's
 149    -I* or -M* options because these conflict with existing GCC
 150    options.  We do however allow passing arbitrary options to the svr4
 151    linker via the -Wl, option, in gcc.c.  We don't support the svr4
 152    linker's -a option at all because it is totally useless and because
 153    it conflicts with GCC's own -a option.
 154
 155    Note that gcc doesn't allow a space to follow -Y in a -YP,* option.
 156
 157    When the -G link option is used (-shared and -symbolic) a final link is
 158    not being done.  */
 159
 160 #undef  LINK_SPEC
 161 #ifdef CROSS_COMPILE
 162 #define LINK_SPEC "%{h*} %{v:-V} \
 163                    %{b} \
 164                    %{static:-dn -Bstatic} \
 165                    %{shared:-G -dy -z text} \
 166                    %{symbolic:-Bsymbolic -G -dy -z text} \
 167                    %{G:-G} \
 168                    %{YP,*} \
 169                    %{Qy:} %{!Qn:-Qy}"
 170 #else
 171 #define LINK_SPEC "%{h*} %{v:-V} \
 172                    %{b} \
 173                    %{static:-dn -Bstatic} \
 174                    %{shared:-G -dy -z text} \
 175                    %{symbolic:-Bsymbolic -G -dy -z text} \
 176                    %{G:-G} \
 177                    %{YP,*} \
 178                    %{!YP,*:%{p:-Y P,/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
 179                     %{!p:-Y P,/usr/ccs/lib:/usr/lib}} \
 180                    %{Qy:} %{!Qn:-Qy}"
 181 #endif
 182
 183 /* Gcc automatically adds in one of the files /usr/ccs/lib/values-Xc.o,
 184    /usr/ccs/lib/values-Xa.o, or /usr/ccs/lib/values-Xt.o for each final
 185    link step (depending upon the other gcc options selected, such as
 186    -traditional and -ansi).  These files each contain one (initialized)
 187    copy of a special variable called `_lib_version'.  Each one of these
 188    files has `_lib_version' initialized to a different (enum) value.
 189    The SVR4 library routines query the value of `_lib_version' at run
 190    to decide how they should behave.  Specifically, they decide (based
 191    upon the value of `_lib_version') if they will act in a strictly ANSI
 192    conforming manner or not.  */
 193
 194 #undef  STARTFILE_SPEC
 195 #define STARTFILE_SPEC "%{!shared: \
 196                          %{!symbolic: \
 197                           %{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}}}\
 198                         %{pg:gcrti.o%s}%{!pg:crti.o%s} \
 199                         %{ansi:values-Xc.o%s} \
 200                         %{!ansi: \
 201                          %{traditional:values-Xt.o%s} \
 202                          %{!traditional:values-Xa.o%s}} \
 203                         crtbegin.o%s"
 204
 205 /* Allow #sccs in preprocessor.  */
 206
 207 #define SCCS_DIRECTIVE
 208
 209 /* The numbers used to denote specific machine registers in the System V
 210    Release 4 DWARF debugging information are quite likely to be totally
 211    different from the numbers used in BSD stabs debugging information
 212    for the same kind of target machine.  Thus, we undefine the macro
 213    DBX_REGISTER_NUMBER here as an extra inducement to get people to
 214    provide proper machine-specific definitions of DBX_REGISTER_NUMBER
 215    (which is also used to provide DWARF registers numbers in dwarfout.c)
 216    in their tm.h files which include this file.  */
 217
 218 #undef DBX_REGISTER_NUMBER
 219
 220 /* Define the actual types of some ANSI-mandated types.  (These
 221    definitions should work for most SVR4 systems).  */
 222
 223 #undef  SIZE_TYPE
 224 #define SIZE_TYPE "unsigned int"
 225
 226 #undef  PTRDIFF_TYPE
 227 #define PTRDIFF_TYPE "int"
 228
 229 #undef  WCHAR_TYPE
 230 #define WCHAR_TYPE "long int"
 231
 232 #undef  WCHAR_TYPE_SIZE
 233 #define WCHAR_TYPE_SIZE BITS_PER_WORD
 234
 235 /* This causes trouble, because it requires the host machine
 236    to support ANSI C.  */
 237 /* #define MULTIBYTE_CHARS */
 238
 239 #define TARGET_HAS_F_SETLKW