gcc/config/i386/dgux.h

   1 /* Target definitions for GNU compiler for Intel 80x86 running DG/ux
   2    Copyright (C) 1993, 1995, 1996, 1997, 1998, 2000
   3    Free Software Foundation, Inc.
   4    Currently maintained by gcc@dg-rtp.dg.com.
   5
   6 This file is part of GNU CC.
   7
   8 GNU CC is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2, or (at your option)
  11 any later version.
  12
  13 GNU CC is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GNU CC; see the file COPYING.  If not, write to
  20 the Free Software Foundation, 59 Temple Place - Suite 330,
  21 Boston, MA 02111-1307, USA.  */
  22
  23 /* for now, we are just like the sysv4 version with a
  24    few hacks
  25 */
  26
  27 #include "i386/sysv4.h"
  28
  29 #ifndef VERSION_INFO2
  30 #define VERSION_INFO2   "$Revision: 1.10 $"
  31 #endif
  32
  33 #ifndef VERSION_STRING
  34 #define VERSION_STRING  version_string
  35 #endif
  36
  37 /* Identify the compiler.  */
  38 /* TARGET_VERSION used by toplev.c VERSION_STRING used by -midentify-revision */
  39
  40 #undef  TARGET_VERSION
  41 #define TARGET_VERSION fprintf (stderr, " (%s%s, %s)", \
  42                                 VERSION_INFO1, VERSION_INFO2, __DATE__)
  43 #undef  VERSION_INFO1
  44 #define VERSION_INFO1 "ix86 DG/ux, "
  45
  46 /* Augment TARGET_SWITCHES with the MXDB options.  */
  47 #define MASK_STANDARD           0x40000000 /* Retain standard information */
  48 #define MASK_NOLEGEND           0x20000000 /* Discard legend information */
  49 #define MASK_EXTERNAL_LEGEND    0x10000000 /* Make external legends */
  50 #define MASK_IDENTIFY_REVISION  0x08000000 /* Emit 'ident' to .s */
  51 #define MASK_WARN_PASS_STRUCT   0x04000000 /* Warn when structures are passed */
  52
  53 #define TARGET_STANDARD           (target_flags & MASK_STANDARD)
  54 #define TARGET_NOLEGEND           (target_flags & MASK_NOLEGEND)
  55 #define TARGET_EXTERNAL_LEGEND    (target_flags & MASK_EXTERNAL_LEGEND)
  56 #define TARGET_IDENTIFY_REVISION  (target_flags & MASK_IDENTIFY_REVISION)
  57 #define TARGET_WARN_PASS_STRUCT   (target_flags & MASK_WARN_PASS_STRUCT)
  58
  59 #undef  SUBTARGET_SWITCHES
  60 #define SUBTARGET_SWITCHES \
  61     { "standard",               MASK_STANDARD,                  \
  62       N_("Retain standard MXDB information") },                 \
  63     { "legend",                 -MASK_NOLEGEND,                 \
  64       N_("Retain legend information") },                        \
  65     { "no-legend",              MASK_NOLEGEND, "" },            \
  66     { "external-legend",        MASK_EXTERNAL_LEGEND,           \
  67       N_("Generate external legend information") },             \
  68     { "identify-revision",      MASK_IDENTIFY_REVISION,         \
  69       N_("Emit identifying info in .s file") },                 \
  70     { "warn-passed-structs",    MASK_WARN_PASS_STRUCT,          \
  71       N_("Warn when a function arg is a structure") },
  72
  73 #undef  DWARF_DEBUGGING_INFO
  74 #define DWARF_DEBUGGING_INFO
  75
  76 /*
  77   allow -gstabs so that those who have gnu-as installed
  78   can debug c++ programs.
  79 */
  80 #undef  DBX_DEBUGGING_INFO
  81 #define DBX_DEBUGGING_INFO
  82
  83 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
  84
  85 /* Override svr[34].h.  */
  86 #undef  ASM_FILE_START
  87 #define ASM_FILE_START(FILE) \
  88   output_file_start (FILE, f_options, ARRAY_SIZE (f_options), \
  89                      W_options, ARRAY_SIZE (W_options))
  90
  91 /* ix86 abi specified type for wchar_t */
  92
  93 #undef WCHAR_TYPE
  94 #define WCHAR_TYPE "long int"
  95
  96 #undef WCHAR_TYPE_SIZE
  97 #define WCHAR_TYPE_SIZE BITS_PER_WORD
  98
  99
 100 /* Some machines may desire to change what optimizations are performed for
 101    various optimization levels.   This macro, if defined, is executed once
 102    just after the optimization level is determined and before the remainder
 103    of the command options have been parsed.  Values set in this macro are
 104    used as the default values for the other command line options.
 105
 106    LEVEL is the optimization level specified; 2 if -O2 is specified,
 107    1 if -O is specified, and 0 if neither is specified.  */
 108
 109 /* This macro used to store 0 in flag_signed_bitfields.
 110    Not only is that misuse of this macro; the whole idea is wrong.
 111
 112    The GNU C dialect makes bitfields signed by default,
 113    regardless of machine type.  Making any machine inconsistent in this
 114    regard is bad for portability.
 115
 116    I chose to make bitfields signed by default because this is consistent
 117    with the way ordinary variables are handled: `int' equals `signed int'.
 118    If there is a good reason to prefer making bitfields unsigned by default,
 119    it cannot have anything to do with the choice of machine.
 120    If the reason is good enough, we should change the convention for all machines.
 121
 122    -- rms, 20 July 1991.  */
 123
 124 /*
 125   this really should go into dgux-local.h
 126 */
 127
 128 #undef  OPTIMIZATION_OPTIONS
 129 #define OPTIMIZATION_OPTIONS(LEVEL,SIZE)                \
 130   do {                                                  \
 131     extern int flag_signed_bitfields;                   \
 132     flag_signed_bitfields = 0;                          \
 133     optimization_options (LEVEL,SIZE);                  \
 134   } while (0)
 135
 136
 137 /* The normal location of the `ld' and `as' programs */
 138
 139 #undef MD_EXEC_PREFIX
 140 #define MD_EXEC_PREFIX "/usr/bin/"
 141
 142 /* The normal location of the various *crt*.o files is the */
 143
 144 #undef MD_STARTFILE_PREFIX
 145 #define MD_STARTFILE_PREFIX "/usr/lib/"
 146
 147 /* Macros to be automatically defined.
 148    __CLASSIFY_TYPE__ is used in the <varargs.h> and <stdarg.h> header
 149    files with DG/UX revision 5.40 and later.  This allows GNU CC to
 150    operate without installing the header files.  */
 151
 152 #undef  CPP_PREDEFINES
 153 #define CPP_PREDEFINES "-D__ix86 -Dunix -DDGUX -D__CLASSIFY_TYPE__=2\
 154    -Asystem(unix) -Asystem(svr4)"
 155
 156    /*
 157      If not -ansi, -traditional, or restricting include files to one
 158      specific source target, specify full DG/UX features.
 159    */
 160 #undef  CPP_SPEC
 161 #define CPP_SPEC "%(cpp_cpu) %{!ansi:%{!traditional:-D__OPEN_NAMESPACE__}}"
 162
 163 /* Assembler support (legends for mxdb).  */
 164 #undef  ASM_SPEC
 165 #define ASM_SPEC "\
 166 %{mno-legend:%{mstandard:-Wc,off}}\
 167 %{g:%{!mno-legend:-Wc,-fix-bb,-s\"%i\"\
 168 %{traditional:,-lc}%{!traditional:,-lansi-c}\
 169 %{mstandard:,-keep-std}\
 170 %{mexternal-legend:,-external}}}"
 171
 172 /* Override svr4.h.  */
 173
 174 /* hassey 3/12/94 keep svr4 ASM_FINAL_SPEC allows -pipe to work */
 175
 176 /* Linker and library spec's.
 177    -static, -shared, -symbolic, -h* and -z* access AT&T V.4 link options.
 178    -svr4 instructs gcc to place /usr/lib/values-X[cat].o on link the line.
 179    The absence of -msvr4 indicates linking done in a COFF environment and
 180    adds the link script to the link line.  In all environments, the first
 181    and last objects are crtbegin.o and crtend.o.
 182    When the -G link option is used (-shared and -symbolic) a final link is
 183    not being done.  */
 184
 185 #undef  LIB_SPEC
 186 #define LIB_SPEC \
 187 "%{!shared:%{!symbolic:-lc}}"
 188
 189 #undef  LINK_SPEC
 190 #define LINK_SPEC "%{z*} %{h*} %{v:-V} \
 191                    %{static:-dn -Bstatic} \
 192                    %{shared:-G -dy} \
 193                    %{symbolic:-Bsymbolic -G -dy} \
 194                    %{pg:-L/usr/lib/libp}%{p:-L/usr/lib/libp}"
 195
 196 #ifdef CROSS_COMPILE
 197
 198 #undef  STARTFILE_SPEC
 199 #define STARTFILE_SPEC "%{!shared:%{!symbolic:%{pg:gcrt1.o%s}           \
 200                                               %{!pg:%{p:mcrt1.o%s}      \
 201                                               %{!p:crt1.o%s}}}}         \
 202                          %{pg:gcrti.o%s}%{!pg:crti.o%s}                 \
 203                          crtbegin.o%s                                   \
 204                          %{ansi:values-Xc.o%s}                          \
 205                          %{!ansi:%{traditional:values-Xt.o%s}           \
 206                                  %{!traditional:values-Xa.o%s}}"
 207
 208 #undef  ENDFILE_SPEC
 209 #define ENDFILE_SPEC "crtend.o%s %{pg:gcrtn.o}%{!pg:crtn.o%s}"
 210
 211 #else
 212
 213 #undef  STARTFILE_SPEC
 214 #define STARTFILE_SPEC "%{!shared:%{!symbolic:%{pg:gcrt1.o%s}           \
 215                                               %{!pg:%{p:/lib/mcrt1.o%s} \
 216                                              %{!p:/lib/crt1.o%s}}}}    \
 217                        %{pg:gcrti.o%s}%{!pg:/lib/crti.o%s}           \
 218                         crtbegin.o%s                                    \
 219                         %{ansi:/lib/values-Xc.o%s}                      \
 220                         %{!ansi:%{traditional:/lib/values-Xt.o%s}       \
 221                                 %{!traditional:/lib/values-Xa.o%s}}"
 222
 223 #undef  ENDFILE_SPEC
 224 #define ENDFILE_SPEC "crtend.o%s %{pg:gcrtn.o}%{!pg:/lib/crtn.o}"
 225
 226 #endif /* CROSS_COMPILE */
 227
 228 /* The maximum alignment which the object file format can support.
 229    page alignment would seem to be enough */
 230 #undef MAX_OFILE_ALIGNMENT
 231 #define MAX_OFILE_ALIGNMENT 0x1000
 232
 233 /* Must use data section for relocatable constants when pic.  */
 234 #undef SELECT_RTX_SECTION
 235 #define SELECT_RTX_SECTION(MODE,RTX)            \
 236 {                                               \
 237   if (flag_pic && symbolic_operand (RTX, VOIDmode)) \
 238     data_section ();                            \
 239   else                                          \
 240     const_section ();                           \
 241 }
 242
 243 /* This supplements FUNCTION_ARG's definition in i386.h to check
 244    TARGET_WARN_PASS_STRUCT */
 245
 246 #undef  FUNCTION_ARG
 247 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
 248 ((((MODE) == BLKmode && TARGET_WARN_PASS_STRUCT) ? \
 249     warning ("argument is a structure"),0 : 0), \
 250     (function_arg (&CUM, MODE, TYPE, NAMED)))
 251
 252 /* Add .align 1 to avoid .backalign bug in assembler */
 253 #undef CONST_SECTION_ASM_OP
 254 #define CONST_SECTION_ASM_OP    ".section\t.rodata\n\t.align 1"