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, 2001 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 line like that in config.gcc:
  25
  26         tm_file="$tm_file elfos.h svr4.h MACHINE/svr4.h"
  27
  28    where MACHINE is replaced by the name of the basic hardware that you
  29    are targeting for.  Then, in the file MACHINE/svr4.h, put any really
  30    system-specific defines (or overrides of defines) which you find that
  31    you need.  For example, CPP_PREDEFINES is defined here with only the
  32    defined -Dunix and -DSVR4.  You should probably override that in your
  33    target-specific MACHINE/svr4.h file with a set of defines that
  34    includes these, but also contains an appropriate define for the type
  35    of hardware that you are targeting.
  36 */
  37
  38 /* Define a symbol indicating that we are using svr4.h.  */
  39 #define USING_SVR4_H
  40
  41 /* Cpp, assembler, linker, library, and startfile spec's.  */
  42
  43 /* This defines which switch letters take arguments.  On svr4, most of
  44    the normal cases (defined in gcc.c) apply, and we also have -h* and
  45    -z* options (for the linker).  Note however that there is no such
  46    thing as a -T option for svr4.  */
  47
  48 #define SWITCH_TAKES_ARG(CHAR)          \
  49   (DEFAULT_SWITCH_TAKES_ARG (CHAR)      \
  50    || (CHAR) == 'h'                     \
  51    || (CHAR) == 'x'                     \
  52    || (CHAR) == 'z')
  53
  54 /* This defines which multi-letter switches take arguments.  On svr4,
  55    there are no such switches except those implemented by GCC itself.  */
  56
  57 #define WORD_SWITCH_TAKES_ARG(STR)                      \
  58  (DEFAULT_WORD_SWITCH_TAKES_ARG (STR)                   \
  59   && strcmp (STR, "Tdata") && strcmp (STR, "Ttext")     \
  60   && strcmp (STR, "Tbss"))
  61
  62 /* You should redefine CPP_PREDEFINES in any file which includes this one.
  63    The definition should be appropriate for the type of target system
  64    involved, and it should include any -A (assertion) options which are
  65    appropriate for the given target system.  */
  66 #undef CPP_PREDEFINES
  67
  68 /* Provide an ASM_SPEC appropriate for svr4.  Here we try to support as
  69    many of the specialized svr4 assembler options as seems reasonable,
  70    given that there are certain options which we can't (or shouldn't)
  71    support directly due to the fact that they conflict with other options
  72    for other svr4 tools (e.g. ld) or with other options for GCC itself.
  73    For example, we don't support the -o (output file) or -R (remove
  74    input file) options because GCC already handles these things.  We
  75    also don't support the -m (run m4) option for the assembler because
  76    that conflicts with the -m (produce load map) option of the svr4
  77    linker.  We do however allow passing arbitrary options to the svr4
  78    assembler via the -Wa, option.
  79
  80    Note that gcc doesn't allow a space to follow -Y in a -Ym,* or -Yd,*
  81    option.
  82 */
  83
  84 #undef  ASM_SPEC
  85 #define ASM_SPEC \
  86   "%{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"
  87
  88 /* svr4 assemblers need the `-' (indicating input from stdin) to come after
  89    the -o option (and its argument) for some reason.  If we try to put it
  90    before the -o option, the assembler will try to read the file named as
  91    the output file in the -o option as an input file (after it has already
  92    written some stuff to it) and the binary stuff contained therein will
  93    cause totally confuse the assembler, resulting in many spurious error
  94    messages.  */
  95
  96 #undef  ASM_FINAL_SPEC
  97 #define ASM_FINAL_SPEC "%|"
  98
  99 /* Under svr4, the normal location of the `ld' and `as' programs is the
 100    /usr/ccs/bin directory.  */
 101
 102 #ifndef CROSS_COMPILE
 103 #undef  MD_EXEC_PREFIX
 104 #define MD_EXEC_PREFIX "/usr/ccs/bin/"
 105 #endif
 106
 107 /* Under svr4, the normal location of the various *crt*.o files is the
 108    /usr/ccs/lib directory.  */
 109
 110 #ifndef CROSS_COMPILE
 111 #undef  MD_STARTFILE_PREFIX
 112 #define MD_STARTFILE_PREFIX "/usr/ccs/lib/"
 113 #endif
 114
 115 /* Provide a LIB_SPEC appropriate for svr4.  Here we tack on the default
 116    standard C library (unless we are building a shared library).  */
 117
 118 #undef  LIB_SPEC
 119 #define LIB_SPEC "%{!shared:%{!symbolic:-lc}}"
 120
 121 /* Provide an ENDFILE_SPEC appropriate for svr4.  Here we tack on our own
 122    magical crtend.o file (see crtstuff.c) which provides part of the
 123    support for getting C++ file-scope static object constructed before
 124    entering `main', followed by the normal svr3/svr4 "finalizer" file,
 125    which is either `gcrtn.o' or `crtn.o'.  */
 126
 127 #undef  ENDFILE_SPEC
 128 #define ENDFILE_SPEC "crtend.o%s %{pg:gcrtn.o%s}%{!pg:crtn.o%s}"
 129
 130 /* Provide a LINK_SPEC appropriate for svr4.  Here we provide support
 131    for the special GCC options -static, -shared, and -symbolic which
 132    allow us to link things in one of these three modes by applying the
 133    appropriate combinations of options at link-time.  We also provide
 134    support here for as many of the other svr4 linker options as seems
 135    reasonable, given that some of them conflict with options for other
 136    svr4 tools (e.g. the assembler).  In particular, we do support the
 137    -z*, -V, -b, -t, -Qy, -Qn, and -YP* options here, and the -e*, -l*,
 138    -o*, -r, -s, -u*, and -L* options are directly supported by gcc.c
 139    itself.  We don't directly support the -m (generate load map)
 140    option because that conflicts with the -m (run m4) option of the
 141    svr4 assembler.  We also don't directly support the svr4 linker's
 142    -I* or -M* options because these conflict with existing GCC
 143    options.  We do however allow passing arbitrary options to the svr4
 144    linker via the -Wl, option, in gcc.c.  We don't support the svr4
 145    linker's -a option at all because it is totally useless and because
 146    it conflicts with GCC's own -a option.
 147
 148    Note that gcc doesn't allow a space to follow -Y in a -YP,* option.
 149
 150    When the -G link option is used (-shared and -symbolic) a final link is
 151    not being done.  */
 152
 153 #undef  LINK_SPEC
 154 #ifdef CROSS_COMPILE
 155 #define LINK_SPEC "%{h*} %{v:-V} \
 156                    %{b} \
 157                    %{static:-dn -Bstatic} \
 158                    %{shared:-G -dy -z text} \
 159                    %{symbolic:-Bsymbolic -G -dy -z text} \
 160                    %{G:-G} \
 161                    %{YP,*} \
 162                    %{Qy:} %{!Qn:-Qy}"
 163 #else
 164 #define LINK_SPEC "%{h*} %{v:-V} \
 165                    %{b} \
 166                    %{static:-dn -Bstatic} \
 167                    %{shared:-G -dy -z text} \
 168                    %{symbolic:-Bsymbolic -G -dy -z text} \
 169                    %{G:-G} \
 170                    %{YP,*} \
 171                    %{!YP,*:%{p:-Y P,/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
 172                     %{!p:-Y P,/usr/ccs/lib:/usr/lib}} \
 173                    %{Qy:} %{!Qn:-Qy}"
 174 #endif
 175
 176 /* Gcc automatically adds in one of the files /usr/ccs/lib/values-Xc.o
 177    or /usr/ccs/lib/values-Xa.o for each final link step (depending
 178    upon the other gcc options selected, such as -ansi).  These files
 179    each contain one (initialized) copy of a special variable called
 180    `_lib_version'.  Each one of these files has `_lib_version' initialized
 181    to a different (enum) value.  The SVR4 library routines query the
 182    value of `_lib_version' at run to decide how they should behave.
 183    Specifically, they decide (based upon the value of `_lib_version')
 184    if they will act in a strictly ANSI conforming manner or not.  */
 185
 186 #undef  STARTFILE_SPEC
 187 #define STARTFILE_SPEC "%{!shared: \
 188                          %{!symbolic: \
 189                           %{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}}}\
 190                         %{pg:gcrti.o%s}%{!pg:crti.o%s} \
 191                         %{ansi:values-Xc.o%s} \
 192                         %{!ansi:values-Xa.o%s} \
 193                         crtbegin.o%s"
 194
 195 /* The numbers used to denote specific machine registers in the System V
 196    Release 4 DWARF debugging information are quite likely to be totally
 197    different from the numbers used in BSD stabs debugging information
 198    for the same kind of target machine.  Thus, we undefine the macro
 199    DBX_REGISTER_NUMBER here as an extra inducement to get people to
 200    provide proper machine-specific definitions of DBX_REGISTER_NUMBER
 201    (which is also used to provide DWARF registers numbers in dwarfout.c)
 202    in their tm.h files which include this file.  */
 203
 204 #undef DBX_REGISTER_NUMBER
 205
 206 /* Define the actual types of some ANSI-mandated types.  (These
 207    definitions should work for most SVR4 systems).  */
 208
 209 #undef  SIZE_TYPE
 210 #define SIZE_TYPE "unsigned int"
 211
 212 #undef  PTRDIFF_TYPE
 213 #define PTRDIFF_TYPE "int"
 214
 215 #undef  WCHAR_TYPE
 216 #define WCHAR_TYPE "long int"
 217
 218 #undef  WCHAR_TYPE_SIZE
 219 #define WCHAR_TYPE_SIZE BITS_PER_WORD
 220
 221 /* This causes trouble, because it requires the host machine
 222    to support ANSI C.  */
 223 /* #define MULTIBYTE_CHARS */
 224
 225 #define TARGET_HAS_F_SETLKW