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, 2004
   4    Free Software Foundation, Inc.
   5    Generic SysV4 file Contributed by Ron Guilmette (rfg@monkeys.com).
   6    Renamed and changed to suit Dynix/ptx v4 and later.
   7    Modified by Tim Wright (timw@sequent.com).
   8    Modified by Janis Johnson (janis@us.ibm.com).
   9
  10 This file is part of GCC.
  11
  12 GCC is free software; you can redistribute it and/or modify
  13 it under the terms of the GNU General Public License as published by
  14 the Free Software Foundation; either version 2, or (at your option)
  15 any later version.
  16
  17 GCC is distributed in the hope that it will be useful,
  18 but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 GNU General Public License for more details.
  21
  22 You should have received a copy of the GNU General Public License
  23 along with GCC; see the file COPYING.  If not, write to
  24 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  25 Boston, MA 02110-1301, USA.
  26
  27 */
  28
  29 /* Define a symbol indicating that we are using svr4.h.  */
  30 #define USING_SVR4_H
  31
  32 /* Use DWARF 2 debugging info by default.  */
  33
  34 #undef PREFERRED_DEBUGGING_TYPE
  35 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
  36
  37 #define DWARF2_DEBUGGING_INFO 1
  38
  39 /* Cpp, assembler, linker, library, and startfile spec's.  */
  40
  41 /* This defines which switch letters take arguments.  On svr4, most of
  42    the normal cases (defined in gcc.c) apply, and we also have -h* and
  43    -z* options (for the linker).  Note however that there is no such
  44    thing as a -T option for svr4.  */
  45
  46 #define SWITCH_TAKES_ARG(CHAR) \
  47   (   (CHAR) == 'D' \
  48    || (CHAR) == 'U' \
  49    || (CHAR) == 'o' \
  50    || (CHAR) == 'e' \
  51    || (CHAR) == 'u' \
  52    || (CHAR) == 'I' \
  53    || (CHAR) == 'm' \
  54    || (CHAR) == 'L' \
  55    || (CHAR) == 'A' \
  56    || (CHAR) == 'h' \
  57    || (CHAR) == 'z')
  58
  59 /* This defines which multi-letter switches take arguments.  On svr4,
  60    there are no such switches except those implemented by GCC itself.  */
  61
  62 #define WORD_SWITCH_TAKES_ARG(STR)                      \
  63  (DEFAULT_WORD_SWITCH_TAKES_ARG (STR)                   \
  64   && strcmp (STR, "Tdata") && strcmp (STR, "Ttext")     \
  65   && strcmp (STR, "Tbss"))
  66
  67 /* Provide an ASM_SPEC appropriate for svr4.  Here we try to support as
  68    many of the specialized svr4 assembler options as seems reasonable,
  69    given that there are certain options which we can't (or shouldn't)
  70    support directly due to the fact that they conflict with other options
  71    for other svr4 tools (e.g. ld) or with other options for GCC itself.
  72    For example, we don't support the -o (output file) or -R (remove
  73    input file) options because GCC already handles these things.  We
  74    also don't support the -m (run m4) option for the assembler because
  75    that conflicts with the -m (produce load map) option of the svr4
  76    linker.  We do however allow passing arbitrary options to the svr4
  77    assembler via the -Wa, option.
  78
  79    Note that gcc doesn't allow a space to follow -Y in a -Ym,* or -Yd,*
  80    option.
  81 */
  82
  83 #undef ASM_SPEC
  84 #ifdef USE_GAS
  85 #define ASM_SPEC \
  86   "%{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"
  87 #else
  88 #define ASM_SPEC \
  89   "-no_0f_fix -no_eflags_chk %{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"
  90 #endif
  91
  92 #define AS_NEEDS_DASH_FOR_PIPED_INPUT
  93
  94 /* Provide a LIB_SPEC appropriate for svr4.  Here we tack on the default
  95    standard C library (unless we are building a shared library).  */
  96
  97 #undef  LIB_SPEC
  98 #define LIB_SPEC "%{!shared:%{!symbolic:-lc}}"
  99
 100 /* Provide a LIBGCC_SPEC appropriate for svr4.  We also want to exclude
 101    libgcc when -symbolic.  */
 102
 103 #undef  LIBGCC_SPEC
 104 #define LIBGCC_SPEC "%{!shared:%{!symbolic:-lgcc}}"
 105
 106 /* Provide an ENDFILE_SPEC appropriate for svr4.  Here we tack on our own
 107    magical crtend.o file (see crtstuff.c) which provides part of the
 108    support for getting C++ file-scope static object constructed before
 109    entering `main', followed by the normal svr3/svr4 "finalizer" file,
 110    which is either `gcrtn.o' or `crtn.o'.  */
 111
 112 #undef  ENDFILE_SPEC
 113 #define ENDFILE_SPEC "crtend.o%s %{pg:gcrtn.o}%{!pg:crtn.o%s}"
 114
 115 /* Provide a LINK_SPEC appropriate for svr4.  Here we provide support
 116    for the special GCC options -static, -shared, and -symbolic which
 117    allow us to link things in one of these three modes by applying the
 118    appropriate combinations of options at link-time.  We also provide
 119    support here for as many of the other svr4 linker options as seems
 120    reasonable, given that some of them conflict with options for other
 121    svr4 tools (e.g. the assembler).  In particular, we do support the
 122    -z*, -V, -b, -t, -Qy, -Qn, and -YP* options here, and the -e*,
 123    -l*, -o*, -r, -s, -u*, and -L* options are directly supported
 124    by gcc.c itself.  We don't directly support the -m (generate load
 125    map) option because that conflicts with the -m (run m4) option of
 126    the svr4 assembler.  We also don't directly support the svr4 linker's
 127    -I* or -M* options because these conflict with existing GCC options.
 128    We do however allow passing arbitrary options to the svr4 linker
 129    via the -Wl, option.  We don't support the svr4 linker's -a option
 130    at all because it is totally useless and because it conflicts with
 131    GCC's own -a option.
 132
 133    Note that gcc doesn't allow a space to follow -Y in a -YP,* option.
 134
 135    When the -G link option is used (-shared and -symbolic) a final link is
 136    not being done.  */
 137
 138 #undef  LINK_SPEC
 139 #define LINK_SPEC "%{h*} %{v:-V} \
 140                    %{b} \
 141                    %{static:-dn -Bstatic} \
 142                    %{shared:-G -dy -z text} \
 143                    %{symbolic:-Bsymbolic -G -dy -z text} \
 144                    %{G:-G} \
 145                    %{YP,*} \
 146                    %{!YP,*:%{p:-Y P,/lib/libp:/usr/lib/libp:/lib:/usr/lib} \
 147                     %{!p:-Y P,/lib:/usr/lib}} \
 148                    %{Qy:} %{!Qn:-Qy}"
 149
 150 /* Gcc automatically adds in one of the files /lib/values-Xc.o
 151    or /lib/values-Xa.o, for each final link step (depending upon the other
 152    gcc options selected, such as -ansi).  These files each contain one
 153    (initialized) copy of a special variable called `_lib_version'.  Each
 154    one of these files has `_lib_version' initialized to a different (enum)
 155    value.  The SVR4 library routines query the value of `_lib_version'
 156    at run to decide how they should behave.  Specifically, they decide
 157    (based upon the value of `_lib_version') if they will act in a strictly
 158    ANSI conforming manner or not.
 159 */
 160
 161 #undef  STARTFILE_SPEC
 162 #define STARTFILE_SPEC "%{!shared: \
 163                          %{!symbolic: \
 164                           %{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}}}\
 165                         %{pg:gcrti.o%s}%{!pg:crti.o%s} \
 166                         %{ansi:values-Xc.o%s} \
 167                         %{!ansi:values-Xa.o%s} \
 168                         crtbegin.o%s"
 169
 170 /* Don't use bcopy, which doesn't handle overlaps before DYNIX/ptx 4.6.  */
 171
 172 #undef HAVE_BCOPY
 173
 174 /* The numbers used to denote specific machine registers in the System V
 175    Release 4 DWARF debugging information are quite likely to be totally
 176    different from the numbers used in BSD stabs debugging information
 177    for the same kind of target machine.  Thus, we undefine the macro
 178    DBX_REGISTER_NUMBER here as an extra inducement to get people to
 179    provide proper machine-specific definitions of DBX_REGISTER_NUMBER
 180    (which is also used to provide DWARF registers numbers in dwarfout.c)
 181    in their tm.h files which include this file.  */
 182
 183 #undef DBX_REGISTER_NUMBER
 184
 185 /* Like block addresses, stabs line numbers are relative to the
 186    current function.  */
 187
 188 #define DBX_LINES_FUNCTION_RELATIVE 1
 189
 190 /* Generate a blank trailing N_SO to mark the end of the .o file, since
 191    we can't depend upon the linker to mark .o file boundaries with
 192    embedded stabs.  */
 193
 194 #define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END
 195
 196 /* Define the actual types of some ANSI-mandated types.  (These
 197    definitions should work for most SVR4 systems).  */
 198
 199 #undef SIZE_TYPE
 200 #define SIZE_TYPE "unsigned int"
 201
 202 #undef PTRDIFF_TYPE
 203 #define PTRDIFF_TYPE "int"
 204
 205 #undef WCHAR_TYPE
 206 #define WCHAR_TYPE "long int"
 207
 208 #undef WCHAR_TYPE_SIZE
 209 #define WCHAR_TYPE_SIZE BITS_PER_WORD
 210
 211 /* This says how to output assembler code to declare an uninitialized
 212    external linkage data item.  There's a bug in the DYNIX/ptx linker
 213    (PR 254649) when the alignment for such an object is specified, so
 214    ignore the ALIGN parameter.  */
 215
 216 #undef ASM_OUTPUT_ALIGNED_COMMON
 217 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN)              \
 218 do {                                                                    \
 219   fprintf ((FILE), "%s", COMMON_ASM_OP);                                \
 220   assemble_name ((FILE), (NAME));                                       \
 221   fprintf ((FILE), ",%lu\n", (unsigned long)(SIZE)); \
 222 } while (0)
 223