gcc/config/ptx4.h

   1 /* Operating system specific defines to be used when targeting GCC for some
   2    generic System V Release 4 system.
   3    Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
   4    Contributed by Ron Guilmette (rfg@monkeys.com).
   5    Renamed and changed to suit Dynix/ptx v4 and later.
   6    Modified by Tim Wright (timw@sequent.com).
   7    Modified by Janis Johnson (janis@us.ibm.com).
   8
   9 This file is part of GNU CC.
  10
  11 GNU CC is free software; you can redistribute it and/or modify
  12 it under the terms of the GNU General Public License as published by
  13 the Free Software Foundation; either version 2, or (at your option)
  14 any later version.
  15
  16 GNU CC is distributed in the hope that it will be useful,
  17 but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 GNU General Public License for more details.
  20
  21 You should have received a copy of the GNU General Public License
  22 along with GNU CC; see the file COPYING.  If not, write to
  23 the Free Software Foundation, 59 Temple Place - Suite 330,
  24 Boston, MA 02111-1307, USA.
  25
  26 */
  27
  28 /* Define a symbol indicating that we are using svr4.h.  */
  29 #define USING_SVR4_H
  30
  31 /* Use DWARF debugging info by default.  */
  32
  33 #undef PREFERRED_DEBUGGING_TYPE
  34 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
  35
  36
  37 /* Cpp, assembler, linker, library, and startfile spec's.  */
  38
  39 /* This defines which switch letters take arguments.  On svr4, most of
  40    the normal cases (defined in gcc.c) apply, and we also have -h* and
  41    -z* options (for the linker).  Note however that there is no such
  42    thing as a -T option for svr4.  */
  43
  44 #define SWITCH_TAKES_ARG(CHAR) \
  45   (   (CHAR) == 'D' \
  46    || (CHAR) == 'U' \
  47    || (CHAR) == 'o' \
  48    || (CHAR) == 'e' \
  49    || (CHAR) == 'u' \
  50    || (CHAR) == 'I' \
  51    || (CHAR) == 'm' \
  52    || (CHAR) == 'L' \
  53    || (CHAR) == 'A' \
  54    || (CHAR) == 'h' \
  55    || (CHAR) == 'z')
  56
  57 /* This defines which multi-letter switches take arguments.  On svr4,
  58    there are no such switches except those implemented by GCC itself.  */
  59
  60 #define WORD_SWITCH_TAKES_ARG(STR)                      \
  61  (DEFAULT_WORD_SWITCH_TAKES_ARG (STR)                   \
  62   && strcmp (STR, "Tdata") && strcmp (STR, "Ttext")     \
  63   && strcmp (STR, "Tbss"))
  64
  65 /* You should redefine CPP_PREDEFINES in any file which includes this one.
  66    The definition should be appropriate for the type of target system
  67    involved, and it should include any -A (assertion) options which are
  68    appropriate for the given target system.  */
  69 #undef CPP_PREDEFINES
  70
  71 /* Provide an ASM_SPEC appropriate for svr4.  Here we try to support as
  72    many of the specialized svr4 assembler options as seems reasonable,
  73    given that there are certain options which we can't (or shouldn't)
  74    support directly due to the fact that they conflict with other options
  75    for other svr4 tools (e.g. ld) or with other options for GCC itself.
  76    For example, we don't support the -o (output file) or -R (remove
  77    input file) options because GCC already handles these things.  We
  78    also don't support the -m (run m4) option for the assembler because
  79    that conflicts with the -m (produce load map) option of the svr4
  80    linker.  We do however allow passing arbitrary options to the svr4
  81    assembler via the -Wa, option.
  82
  83    Note that gcc doesn't allow a space to follow -Y in a -Ym,* or -Yd,*
  84    option.
  85 */
  86
  87 #undef ASM_SPEC
  88 #ifdef USE_GAS
  89 #define ASM_SPEC \
  90   "%{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"
  91 #else
  92 #define ASM_SPEC \
  93   "-no_0f_fix -no_eflags_chk %{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"
  94 #endif
  95
  96 #define AS_NEEDS_DASH_FOR_PIPED_INPUT
  97
  98 /* Provide a LIB_SPEC appropriate for svr4.  Here we tack on the default
  99    standard C library (unless we are building a shared library).  */
 100
 101 #undef  LIB_SPEC
 102 #define LIB_SPEC "%{!shared:%{!symbolic:-lc}}"
 103
 104 /* Provide a LIBGCC_SPEC appropriate for svr4.  We also want to exclude
 105    libgcc when -symbolic.  */
 106
 107 #undef  LIBGCC_SPEC
 108 #define LIBGCC_SPEC "%{!shared:%{!symbolic:-lgcc}}"
 109
 110 /* Provide an ENDFILE_SPEC appropriate for svr4.  Here we tack on our own
 111    magical crtend.o file (see crtstuff.c) which provides part of the
 112    support for getting C++ file-scope static object constructed before
 113    entering `main', followed by the normal svr3/svr4 "finalizer" file,
 114    which is either `gcrtn.o' or `crtn.o'.  */
 115
 116 #undef  ENDFILE_SPEC
 117 #define ENDFILE_SPEC "crtend.o%s %{pg:gcrtn.o}%{!pg:crtn.o%s}"
 118
 119 /* Provide a LINK_SPEC appropriate for svr4.  Here we provide support
 120    for the special GCC options -static, -shared, and -symbolic which
 121    allow us to link things in one of these three modes by applying the
 122    appropriate combinations of options at link-time.  We also provide
 123    support here for as many of the other svr4 linker options as seems
 124    reasonable, given that some of them conflict with options for other
 125    svr4 tools (e.g. the assembler).  In particular, we do support the
 126    -z*, -V, -b, -t, -Qy, -Qn, and -YP* options here, and the -e*,
 127    -l*, -o*, -r, -s, -u*, and -L* options are directly supported
 128    by gcc.c itself.  We don't directly support the -m (generate load
 129    map) option because that conflicts with the -m (run m4) option of
 130    the svr4 assembler.  We also don't directly support the svr4 linker's
 131    -I* or -M* options because these conflict with existing GCC options.
 132    We do however allow passing arbitrary options to the svr4 linker
 133    via the -Wl, option.  We don't support the svr4 linker's -a option
 134    at all because it is totally useless and because it conflicts with
 135    GCC's own -a option.
 136
 137    Note that gcc doesn't allow a space to follow -Y in a -YP,* option.
 138
 139    When the -G link option is used (-shared and -symbolic) a final link is
 140    not being done.  */
 141
 142 #undef  LINK_SPEC
 143 #define LINK_SPEC "%{h*} %{v:-V} \
 144                    %{b} %{Wl,*:%*} \
 145                    %{static:-dn -Bstatic} \
 146                    %{shared:-G -dy -z text} \
 147                    %{symbolic:-Bsymbolic -G -dy -z text} \
 148                    %{G:-G} \
 149                    %{YP,*} \
 150                    %{!YP,*:%{p:-Y P,/lib/libp:/usr/lib/libp:/lib:/usr/lib} \
 151                     %{!p:-Y P,/lib:/usr/lib}} \
 152                    %{Qy:} %{!Qn:-Qy}"
 153
 154 /* Gcc automatically adds in one of the files /lib/values-Xc.o
 155    or /lib/values-Xa.o, for each final link step (depending upon the other
 156    gcc options selected, such as -ansi).  These files each contain one
 157    (initialized) copy of a special variable called `_lib_version'.  Each
 158    one of these files has `_lib_version' initialized to a different (enum)
 159    value.  The SVR4 library routines query the value of `_lib_version'
 160    at run to decide how they should behave.  Specifically, they decide
 161    (based upon the value of `_lib_version') if they will act in a strictly
 162    ANSI conforming manner or not.
 163 */
 164
 165 #undef  STARTFILE_SPEC
 166 #define STARTFILE_SPEC "%{!shared: \
 167                          %{!symbolic: \
 168                           %{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}}}\
 169                         %{pg:gcrti.o%s}%{!pg:crti.o%s} \
 170                         %{ansi:values-Xc.o%s} \
 171                         %{!ansi:values-Xa.o%s} \
 172                         crtbegin.o%s"
 173
 174 /* Don't use bcopy, which doesn't handle overlaps before DYNIX/ptx 4.6.  */
 175
 176 #undef HAVE_BCOPY
 177
 178 /* The numbers used to denote specific machine registers in the System V
 179    Release 4 DWARF debugging information are quite likely to be totally
 180    different from the numbers used in BSD stabs debugging information
 181    for the same kind of target machine.  Thus, we undefine the macro
 182    DBX_REGISTER_NUMBER here as an extra inducement to get people to
 183    provide proper machine-specific definitions of DBX_REGISTER_NUMBER
 184    (which is also used to provide DWARF registers numbers in dwarfout.c)
 185    in their tm.h files which include this file.  */
 186
 187 #undef DBX_REGISTER_NUMBER
 188
 189 /* Like block addresses, stabs line numbers are relative to the
 190    current function.  */
 191
 192 #undef ASM_OUTPUT_SOURCE_LINE
 193 #define ASM_OUTPUT_SOURCE_LINE(file, line)                              \
 194 do                                                                      \
 195   {                                                                     \
 196     static int sym_lineno = 1;                                          \
 197     fprintf (file, ".stabn 68,0,%d,.LM%d-",                             \
 198              line, sym_lineno);                                         \
 199     assemble_name (file,                                                \
 200                    XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));\
 201     fprintf (file, "\n.LM%d:\n", sym_lineno);                           \
 202     sym_lineno += 1;                                                    \
 203   }                                                                     \
 204 while (0)
 205
 206 /* Generate a blank trailing N_SO to mark the end of the .o file, since
 207    we can't depend upon the linker to mark .o file boundaries with
 208    embedded stabs.  */
 209
 210 #undef DBX_OUTPUT_MAIN_SOURCE_FILE_END
 211 #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(FILE, FILENAME)                 \
 212   fprintf (FILE,                                                        \
 213            "\t.text\n\t.stabs \"\",%d,0,0,.Letext\n.Letext:\n", N_SO)
 214
 215 /* Define the actual types of some ANSI-mandated types.  (These
 216    definitions should work for most SVR4 systems).  */
 217
 218 #undef SIZE_TYPE
 219 #define SIZE_TYPE "unsigned int"
 220
 221 #undef PTRDIFF_TYPE
 222 #define PTRDIFF_TYPE "int"
 223
 224 #undef WCHAR_TYPE
 225 #define WCHAR_TYPE "long int"
 226
 227 #undef WCHAR_TYPE_SIZE
 228 #define WCHAR_TYPE_SIZE BITS_PER_WORD
 229
 230 /* This says how to output assembler code to declare an uninitialized
 231    external linkage data item.  There's a bug in the DYNIX/ptx linker
 232    (PR 254649) when the alignment for such an object is specified, so
 233    ignore the ALIGN parameter.  */
 234
 235 #undef ASM_OUTPUT_ALIGNED_COMMON
 236 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN)              \
 237 do {                                                                    \
 238   fprintf ((FILE), "%s", COMMON_ASM_OP);                                \
 239   assemble_name ((FILE), (NAME));                                       \
 240   fprintf ((FILE), ",%u\n", (SIZE));                                    \
 241 } while (0)