gcc/config/ptx4.h

   1 /* Operating system specific defines to be used when targeting GCC for
   2    Sequent's Dynix/ptx v4 and later.
   3    Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2003 Free Software Foundation, Inc.
   4    Generic SysV4 file 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 GCC.
  10
  11 GCC 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 GCC 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 GCC; 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 2 debugging info by default.  */
  32
  33 #undef PREFERRED_DEBUGGING_TYPE
  34 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
  35
  36 #define DWARF2_DEBUGGING_INFO 1
  37
  38 /* Cpp, assembler, linker, library, and startfile spec's.  */
  39
  40 /* This defines which switch letters take arguments.  On svr4, most of
  41    the normal cases (defined in gcc.c) apply, and we also have -h* and
  42    -z* options (for the linker).  Note however that there is no such
  43    thing as a -T option for svr4.  */
  44
  45 #define SWITCH_TAKES_ARG(CHAR) \
  46   (   (CHAR) == 'D' \
  47    || (CHAR) == 'U' \
  48    || (CHAR) == 'o' \
  49    || (CHAR) == 'e' \
  50    || (CHAR) == 'u' \
  51    || (CHAR) == 'I' \
  52    || (CHAR) == 'm' \
  53    || (CHAR) == 'L' \
  54    || (CHAR) == 'A' \
  55    || (CHAR) == 'h' \
  56    || (CHAR) == 'z')
  57
  58 /* This defines which multi-letter switches take arguments.  On svr4,
  59    there are no such switches except those implemented by GCC itself.  */
  60
  61 #define WORD_SWITCH_TAKES_ARG(STR)                      \
  62  (DEFAULT_WORD_SWITCH_TAKES_ARG (STR)                   \
  63   && strcmp (STR, "Tdata") && strcmp (STR, "Ttext")     \
  64   && strcmp (STR, "Tbss"))
  65
  66 /* Provide an ASM_SPEC appropriate for svr4.  Here we try to support as
  67    many of the specialized svr4 assembler options as seems reasonable,
  68    given that there are certain options which we can't (or shouldn't)
  69    support directly due to the fact that they conflict with other options
  70    for other svr4 tools (e.g. ld) or with other options for GCC itself.
  71    For example, we don't support the -o (output file) or -R (remove
  72    input file) options because GCC already handles these things.  We
  73    also don't support the -m (run m4) option for the assembler because
  74    that conflicts with the -m (produce load map) option of the svr4
  75    linker.  We do however allow passing arbitrary options to the svr4
  76    assembler via the -Wa, option.
  77
  78    Note that gcc doesn't allow a space to follow -Y in a -Ym,* or -Yd,*
  79    option.
  80 */
  81
  82 #undef ASM_SPEC
  83 #ifdef USE_GAS
  84 #define ASM_SPEC \
  85   "%{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"
  86 #else
  87 #define ASM_SPEC \
  88   "-no_0f_fix -no_eflags_chk %{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"
  89 #endif
  90
  91 #define AS_NEEDS_DASH_FOR_PIPED_INPUT
  92
  93 /* Provide a LIB_SPEC appropriate for svr4.  Here we tack on the default
  94    standard C library (unless we are building a shared library).  */
  95
  96 #undef  LIB_SPEC
  97 #define LIB_SPEC "%{!shared:%{!symbolic:-lc}}"
  98
  99 /* Provide a LIBGCC_SPEC appropriate for svr4.  We also want to exclude
 100    libgcc when -symbolic.  */
 101
 102 #undef  LIBGCC_SPEC
 103 #define LIBGCC_SPEC "%{!shared:%{!symbolic:-lgcc}}"
 104
 105 /* Provide an ENDFILE_SPEC appropriate for svr4.  Here we tack on our own
 106    magical crtend.o file (see crtstuff.c) which provides part of the
 107    support for getting C++ file-scope static object constructed before
 108    entering `main', followed by the normal svr3/svr4 "finalizer" file,
 109    which is either `gcrtn.o' or `crtn.o'.  */
 110
 111 #undef  ENDFILE_SPEC
 112 #define ENDFILE_SPEC "crtend.o%s %{pg:gcrtn.o}%{!pg:crtn.o%s}"
 113
 114 /* Provide a LINK_SPEC appropriate for svr4.  Here we provide support
 115    for the special GCC options -static, -shared, and -symbolic which
 116    allow us to link things in one of these three modes by applying the
 117    appropriate combinations of options at link-time.  We also provide
 118    support here for as many of the other svr4 linker options as seems
 119    reasonable, given that some of them conflict with options for other
 120    svr4 tools (e.g. the assembler).  In particular, we do support the
 121    -z*, -V, -b, -t, -Qy, -Qn, and -YP* options here, and the -e*,
 122    -l*, -o*, -r, -s, -u*, and -L* options are directly supported
 123    by gcc.c itself.  We don't directly support the -m (generate load
 124    map) option because that conflicts with the -m (run m4) option of
 125    the svr4 assembler.  We also don't directly support the svr4 linker's
 126    -I* or -M* options because these conflict with existing GCC options.
 127    We do however allow passing arbitrary options to the svr4 linker
 128    via the -Wl, option.  We don't support the svr4 linker's -a option
 129    at all because it is totally useless and because it conflicts with
 130    GCC's own -a option.
 131
 132    Note that gcc doesn't allow a space to follow -Y in a -YP,* option.
 133
 134    When the -G link option is used (-shared and -symbolic) a final link is
 135    not being done.  */
 136
 137 #undef  LINK_SPEC
 138 #define LINK_SPEC "%{h*} %{v:-V} \
 139                    %{b} %{Wl,*:%*} \
 140                    %{static:-dn -Bstatic} \
 141                    %{shared:-G -dy -z text} \
 142                    %{symbolic:-Bsymbolic -G -dy -z text} \
 143                    %{G:-G} \
 144                    %{YP,*} \
 145                    %{!YP,*:%{p:-Y P,/lib/libp:/usr/lib/libp:/lib:/usr/lib} \
 146                     %{!p:-Y P,/lib:/usr/lib}} \
 147                    %{Qy:} %{!Qn:-Qy}"
 148
 149 /* Gcc automatically adds in one of the files /lib/values-Xc.o
 150    or /lib/values-Xa.o, for each final link step (depending upon the other
 151    gcc options selected, such as -ansi).  These files each contain one
 152    (initialized) copy of a special variable called `_lib_version'.  Each
 153    one of these files has `_lib_version' initialized to a different (enum)
 154    value.  The SVR4 library routines query the value of `_lib_version'
 155    at run to decide how they should behave.  Specifically, they decide
 156    (based upon the value of `_lib_version') if they will act in a strictly
 157    ANSI conforming manner or not.
 158 */
 159
 160 #undef  STARTFILE_SPEC
 161 #define STARTFILE_SPEC "%{!shared: \
 162                          %{!symbolic: \
 163                           %{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}}}\
 164                         %{pg:gcrti.o%s}%{!pg:crti.o%s} \
 165                         %{ansi:values-Xc.o%s} \
 166                         %{!ansi:values-Xa.o%s} \
 167                         crtbegin.o%s"
 168
 169 /* Don't use bcopy, which doesn't handle overlaps before DYNIX/ptx 4.6.  */
 170
 171 #undef HAVE_BCOPY
 172
 173 /* The numbers used to denote specific machine registers in the System V
 174    Release 4 DWARF debugging information are quite likely to be totally
 175    different from the numbers used in BSD stabs debugging information
 176    for the same kind of target machine.  Thus, we undefine the macro
 177    DBX_REGISTER_NUMBER here as an extra inducement to get people to
 178    provide proper machine-specific definitions of DBX_REGISTER_NUMBER
 179    (which is also used to provide DWARF registers numbers in dwarfout.c)
 180    in their tm.h files which include this file.  */
 181
 182 #undef DBX_REGISTER_NUMBER
 183
 184 /* Like block addresses, stabs line numbers are relative to the
 185    current function.  */
 186
 187 #undef ASM_OUTPUT_SOURCE_LINE
 188 #define ASM_OUTPUT_SOURCE_LINE(file, line, counter)                     \
 189 do                                                                      \
 190   {                                                                     \
 191     fprintf (file, ".stabn 68,0,%d,.LM%d-",                             \
 192              line, counter);                                            \
 193     assemble_name (file,                                                \
 194                    XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));\
 195     fprintf (file, "\n.LM%d:\n", counter);                              \
 196   }                                                                     \
 197 while (0)
 198
 199 /* Generate a blank trailing N_SO to mark the end of the .o file, since
 200    we can't depend upon the linker to mark .o file boundaries with
 201    embedded stabs.  */
 202
 203 #undef DBX_OUTPUT_MAIN_SOURCE_FILE_END
 204 #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(FILE, FILENAME)                 \
 205   fprintf (FILE,                                                        \
 206            "\t.text\n\t.stabs \"\",%d,0,0,.Letext\n.Letext:\n", N_SO)
 207
 208 /* Define the actual types of some ANSI-mandated types.  (These
 209    definitions should work for most SVR4 systems).  */
 210
 211 #undef SIZE_TYPE
 212 #define SIZE_TYPE "unsigned int"
 213
 214 #undef PTRDIFF_TYPE
 215 #define PTRDIFF_TYPE "int"
 216
 217 #undef WCHAR_TYPE
 218 #define WCHAR_TYPE "long int"
 219
 220 #undef WCHAR_TYPE_SIZE
 221 #define WCHAR_TYPE_SIZE BITS_PER_WORD
 222
 223 /* This says how to output assembler code to declare an uninitialized
 224    external linkage data item.  There's a bug in the DYNIX/ptx linker
 225    (PR 254649) when the alignment for such an object is specified, so
 226    ignore the ALIGN parameter.  */
 227
 228 #undef ASM_OUTPUT_ALIGNED_COMMON
 229 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN)              \
 230 do {                                                                    \
 231   fprintf ((FILE), "%s", COMMON_ASM_OP);                                \
 232   assemble_name ((FILE), (NAME));                                       \
 233   fprintf ((FILE), ",%lu\n", (unsigned long)(SIZE)); \
 234 } while (0)
 235