gcc/config/i386/dgux.h

   1 /* Target definitions for GNU compiler for Intel 80x86 running DG/ux
   2    Copyright (C) 1993, 1995, 1996 Free Software Foundation, Inc.
   3    Currently maintained by gcc@dg-rtp.dg.com.
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU CC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  20
  21 /* for now, we are just like the sysv4 version with a
  22    few hacks
  23 */
  24
  25 #include "i386/sysv4.h"
  26
  27 #ifndef VERSION_INFO2
  28 #define VERSION_INFO2   "$Revision: 1.1 $"
  29 #endif
  30
  31 #ifndef VERSION_STRING
  32 #define VERSION_STRING  version_string
  33 #endif
  34
  35 /* Identify the compiler.  */
  36 /* TARGET_VERSION used by toplev.c VERSION_STRING used by -midentify-revision */
  37
  38 #undef  TARGET_VERSION
  39 #define TARGET_VERSION fprintf (stderr, " (%s%s, %s)", \
  40                                 VERSION_INFO1, VERSION_INFO2, __DATE__)
  41 #undef  VERSION_INFO1
  42 #define VERSION_INFO1 "ix86 DG/ux, "
  43
  44 /* Augment TARGET_SWITCHES with the MXDB options.  */
  45 #define MASK_STANDARD           0x40000000 /* Retain standard information */
  46 #define MASK_NOLEGEND           0x20000000 /* Discard legend information */
  47 #define MASK_EXTERNAL_LEGEND    0x10000000 /* Make external legends */
  48 #define MASK_IDENTIFY_REVISION  0x08000000 /* Emit 'ident' to .s */
  49 #define MASK_WARN_PASS_STRUCT   0x04000000 /* Emit 'ident' to .s */
  50
  51 #define TARGET_STANDARD           (target_flags & MASK_STANDARD)
  52 #define TARGET_NOLEGEND           (target_flags & MASK_NOLEGEND)
  53 #define TARGET_EXTERNAL_LEGEND    (target_flags & MASK_EXTERNAL_LEGEND)
  54 #define TARGET_IDENTIFY_REVISION  (target_flags & MASK_IDENTIFY_REVISION)
  55 #define TARGET_WARN_PASS_STRUCT   (target_flags & MASK_WARN_PASS_STRUCT)
  56
  57 #undef  SUBTARGET_SWITCHES
  58 #define SUBTARGET_SWITCHES \
  59     { "standard",                        MASK_STANDARD },          \
  60     { "legend",                         -MASK_NOLEGEND },          \
  61     { "no-legend",                       MASK_NOLEGEND },          \
  62     { "external-legend",                 MASK_EXTERNAL_LEGEND },   \
  63     { "identify-revision",               MASK_IDENTIFY_REVISION }, \
  64     { "warn-passed-structs",             MASK_WARN_PASS_STRUCT },
  65
  66 #undef  DWARF_DEBUGGING_INFO
  67 #define DWARF_DEBUGGING_INFO
  68
  69 /*
  70   allow -gstabs so that those who have gnu-as installed
  71   can debug c++ programs.
  72 */
  73 #undef  DBX_DEBUGGING_INFO
  74 #define DBX_DEBUGGING_INFO
  75
  76 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
  77
  78 /* Override svr[34].h.  */
  79 #undef  ASM_FILE_START
  80 #define ASM_FILE_START(FILE) \
  81   output_file_start (FILE, f_options, sizeof f_options / sizeof f_options[0], \
  82                      W_options, sizeof W_options / sizeof W_options[0])
  83
  84 /* ix86 abi specified type for wchar_t */
  85
  86 #undef WCHAR_TYPE
  87 #define WCHAR_TYPE "long int"
  88
  89 #undef WCHAR_TYPE_SIZE
  90 #define WCHAR_TYPE_SIZE BITS_PER_WORD
  91
  92
  93 /* Some machines may desire to change what optimizations are performed for
  94    various optimization levels.   This macro, if defined, is executed once
  95    just after the optimization level is determined and before the remainder
  96    of the command options have been parsed.  Values set in this macro are
  97    used as the default values for the other command line options.
  98
  99    LEVEL is the optimization level specified; 2 if -O2 is specified,
 100    1 if -O is specified, and 0 if neither is specified.  */
 101
 102 /* This macro used to store 0 in flag_signed_bitfields.
 103    Not only is that misuse of this macro; the whole idea is wrong.
 104
 105    The GNU C dialect makes bitfields signed by default,
 106    regardless of machine type.  Making any machine inconsistent in this
 107    regard is bad for portability.
 108
 109    I chose to make bitfields signed by default because this is consistent
 110    with the way ordinary variables are handled: `int' equals `signed int'.
 111    If there is a good reason to prefer making bitfields unsigned by default,
 112    it cannot have anything to do with the choice of machine.
 113    If the reason is good enough, we should change the convention for all machines.
 114
 115    -- rms, 20 July 1991.  */
 116
 117 /*
 118   this really should go into dgux-local.h
 119 */
 120
 121 #undef  OPTIMIZATION_OPTIONS
 122 #define OPTIMIZATION_OPTIONS(LEVEL)                     \
 123   do {                                                  \
 124     extern int flag_signed_bitfields;                   \
 125     flag_signed_bitfields = 0;                          \
 126     abort_helper ();                                    \
 127     optimization_options (LEVEL);                       \
 128   } while (0)
 129
 130
 131 /* The normal location of the `ld' and `as' programs */
 132
 133 #undef MD_EXEC_PREFIX
 134 #define MD_EXEC_PREFIX "/usr/bin/"
 135
 136 /* The normal location of the various *crt*.o files is the */
 137
 138 #undef MD_STARTFILE_PREFIX
 139 #define MD_STARTFILE_PREFIX "/usr/lib/"
 140
 141 /* Macros to be automatically defined.
 142    __CLASSIFY_TYPE__ is used in the <varargs.h> and <stdarg.h> header
 143    files with DG/UX revision 5.40 and later.  This allows GNU CC to
 144    operate without installing the header files.  */
 145
 146 #undef  CPP_PREDEFINES
 147 #define CPP_PREDEFINES "-Di386 -D__ix86 -Dunix -DDGUX -D__CLASSIFY_TYPE__=2\
 148    -Asystem(unix) -Asystem(svr4) -Acpu(i386) -Amachine(i386)"
 149
 150    /*
 151      If not -ansi, -traditional, or restricting include files to one
 152      specific source target, specify full DG/UX features.
 153    */
 154 #undef  CPP_SPEC
 155 #define CPP_SPEC "%{!ansi:%{!traditional:-D__OPEN_NAMESPACE__}}"
 156
 157 /* Assembler support (legends for mxdb).  */
 158 #undef  ASM_SPEC
 159 #define ASM_SPEC "\
 160 %{mno-legend:%{mstandard:-Wc,off}}\
 161 %{g:%{!mno-legend:-Wc,-fix-bb,-s\"%i\"\
 162 %{traditional:,-lc}%{!traditional:,-lansi-c}\
 163 %{mstandard:,-keep-std}\
 164 %{mexternal-legend:,-external}}}"
 165
 166 /* Override svr4.h.  */
 167
 168 /* hassey 3/12/94 keep svr4 ASM_FINAL_SPEC allows -pipe to work */
 169
 170 /* Linker and library spec's.
 171    -static, -shared, -symbolic, -h* and -z* access AT&T V.4 link options.
 172    -svr4 instructs gcc to place /usr/lib/values-X[cat].o on link the line.
 173    The absense of -msvr4 indicates linking done in a COFF environment and
 174    adds the link script to the link line.  In all environments, the first
 175    and last objects are crtbegin.o and crtend.o.
 176    When the -G link option is used (-shared and -symbolic) a final link is
 177    not being done.  */
 178
 179 #undef  LIB_SPEC
 180 #define LIB_SPEC \
 181 "%{!shared:%{!symbolic:-lc}}"
 182
 183 #undef  LINK_SPEC
 184 #define LINK_SPEC "%{z*} %{h*} %{v:-V} \
 185                    %{static:-dn -Bstatic} \
 186                    %{shared:-G -dy} \
 187                    %{symbolic:-Bsymbolic -G -dy} \
 188                    %{pg:-L/usr/lib/libp}%{p:-L/usr/lib/libp}"
 189
 190 #ifdef CROSS_COMPILE
 191
 192 #undef  STARTFILE_SPEC
 193 #define STARTFILE_SPEC "%{!shared:%{!symbolic:%{pg:gcrt1.o%s}           \
 194                                               %{!pg:%{p:mcrt1.o%s}      \
 195                                               %{!p:crt1.o%s}}}}         \
 196                          %{pg:gcrti.o%s}%{!pg:crti.o%s}                 \
 197                          crtbegin.o%s                                   \
 198                          %{ansi:values-Xc.o%s}                          \
 199                          %{!ansi:%{traditional:values-Xt.o%s}           \
 200                                  %{!traditional:values-Xa.o%s}}"
 201
 202 #undef  ENDFILE_SPEC
 203 #define ENDFILE_SPEC "crtend.o%s %{pg:gcrtn.o}%{!pg:crtn.o%s}"
 204
 205 #else
 206
 207 #undef  STARTFILE_SPEC
 208 #define STARTFILE_SPEC "%{!shared:%{!symbolic:%{pg:gcrt1.o%s}           \
 209                                               %{!pg:%{p:/lib/mcrt1.o%s} \
 210                                               %{!p:/lib/crt1.o%s}}}     \
 211                         %{pg:gcrti.o%s}%{!pg:/lib/crti.o%s}}            \
 212                         crtbegin.o%s                                    \
 213                         %{ansi:/lib/values-Xc.o%s}                      \
 214                         %{!ansi:%{traditional:/lib/values-Xt.o%s}       \
 215                                 %{!traditional:/lib/values-Xa.o%s}}"
 216
 217 #undef  ENDFILE_SPEC
 218 #define ENDFILE_SPEC "crtend.o%s %{pg:gcrtn.o}%{!pg:/lib/crtn.o}"
 219
 220 #endif /* CROSS_COMPILE */
 221
 222 #if !defined (no_abort) || defined (CRT_BEGIN) || defined (CRT_END)
 223 #undef abort
 224
 225 char insn; int insn_; char * file_; int line_;
 226 #define abort()                 \
 227   (insn_ = (int) insn,          \
 228    file_ = __FILE__,            \
 229    line_ = __LINE__,            \
 230    fancy_abort ())
 231 #define abort_helper()          \
 232   do {                          \
 233     extern void abort_aux ();   \
 234     atexit (abort_aux);         \
 235   } while (0)
 236 #define _abort_aux
 237 #endif /* no abort */
 238
 239 /* The maximum alignment which the object file format can support.
 240    page alignment would seem to be enough */
 241 #undef MAX_OFILE_ALIGNMENT
 242 #define MAX_OFILE_ALIGNMENT 0x1000
 243
 244 /* Must use data section for relocatable constants when pic.  */
 245 #undef SELECT_RTX_SECTION
 246 #define SELECT_RTX_SECTION(MODE,RTX)            \
 247 {                                               \
 248   if (flag_pic && symbolic_operand (RTX))       \
 249     data_section ();                            \
 250   else                                          \
 251     const_section ();                           \
 252 }
 253
 254 /* This supplements FUNCTION_ARG's definition in i386.h to check
 255    TARGET_WARN_PASS_STRUCT */
 256
 257 #undef  FUNCTION_ARG
 258 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
 259 ((((MODE) == BLKmode && TARGET_WARN_PASS_STRUCT) ? \
 260     warning ("argument is a structure"),0 : 0), \
 261     (function_arg (&CUM, MODE, TYPE, NAMED)))
 262
 263 /* This is how to output an assembler line
 264    that says to advance the location counter
 265    to a multiple of 2**LOG bytes.  */
 266
 267 #undef ASM_OUTPUT_ALIGN
 268 #define ASM_OUTPUT_ALIGN(FILE,LOG)      \
 269      if (LOG <= 2)                      \
 270         fprintf ((FILE), "\t.align %d\n", 1<<(LOG));\
 271      else if ((LOG)!=0)                 \
 272         {                               \
 273          char buf[256];                 \
 274          if (!backalign_labelno) fprintf ((FILE), "\t.align %d\n", 1); \
 275          ASM_GENERATE_INTERNAL_LABEL (buf, "LBA", backalign_labelno++); \
 276          fprintf ((FILE), "%s:", &buf[1]); \
 277          fprintf ((FILE), "\t.backalign %s,%d,%d\n", &buf[1], 1<<(LOG), \
 278                   ((TARGET_PENTIUMPRO || TARGET_486) && LOG==4) ? 6 : 2);\
 279         }
 280
 281 /* add .align 1 to avoid .backalign bug in assembler */
 282 #undef CONST_SECTION_ASM_OP
 283 #define CONST_SECTION_ASM_OP    ".section\t.rodata\n\t.align 1"