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, 2001, 2002
   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 #ifndef VERSION_INFO2
  28 #define VERSION_INFO2   "$Revision: 1.17 $"
  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 /* Warn when structures are passed */
  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       N_("Retain standard MXDB information") },                 \
  61     { "legend",                 -MASK_NOLEGEND,                 \
  62       N_("Retain legend information") },                        \
  63     { "no-legend",              MASK_NOLEGEND, "" },            \
  64     { "external-legend",        MASK_EXTERNAL_LEGEND,           \
  65       N_("Generate external legend information") },             \
  66     { "identify-revision",      MASK_IDENTIFY_REVISION,         \
  67       N_("Emit identifying info in .s file") },                 \
  68     { "warn-passed-structs",    MASK_WARN_PASS_STRUCT,          \
  69       N_("Warn when a function arg is a structure") },
  70
  71 #undef  DWARF_DEBUGGING_INFO
  72 #define DWARF_DEBUGGING_INFO
  73
  74 /*
  75   allow -gstabs so that those who have gnu-as installed
  76   can debug c++ programs.
  77 */
  78 #undef  DBX_DEBUGGING_INFO
  79 #define DBX_DEBUGGING_INFO
  80
  81 #undef  PREFERRED_DEBUGGING_TYPE
  82 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
  83
  84 /* Override svr[34].h.  Switch to the data section so that the coffsem
  85    symbol isn't in the text section.  */
  86 #undef  ASM_FILE_START
  87 #define ASM_FILE_START(FILE) \
  88   do { \
  89     output_file_directive (FILE, main_input_filename); \
  90     fprintf (FILE, "\t.version\t\"01.01\"\n"); \
  91     data_section (); \
  92   } while (0)
  93
  94 /* ix86 abi specified type for wchar_t */
  95
  96 #undef WCHAR_TYPE
  97 #define WCHAR_TYPE "long int"
  98
  99 #undef WCHAR_TYPE_SIZE
 100 #define WCHAR_TYPE_SIZE BITS_PER_WORD
 101
 102
 103 /* Some machines may desire to change what optimizations are performed for
 104    various optimization levels.   This macro, if defined, is executed once
 105    just after the optimization level is determined and before the remainder
 106    of the command options have been parsed.  Values set in this macro are
 107    used as the default values for the other command line options.
 108
 109    LEVEL is the optimization level specified; 2 if -O2 is specified,
 110    1 if -O is specified, and 0 if neither is specified.  */
 111
 112 /* This macro used to store 0 in flag_signed_bitfields.
 113    Not only is that misuse of this macro; the whole idea is wrong.
 114
 115    The GNU C dialect makes bitfields signed by default,
 116    regardless of machine type.  Making any machine inconsistent in this
 117    regard is bad for portability.
 118
 119    I chose to make bitfields signed by default because this is consistent
 120    with the way ordinary variables are handled: `int' equals `signed int'.
 121    If there is a good reason to prefer making bitfields unsigned by default,
 122    it cannot have anything to do with the choice of machine.
 123    If the reason is good enough, we should change the convention for all machines.
 124
 125    -- rms, 20 July 1991.  */
 126
 127 /*
 128   this really should go into dgux-local.h
 129 */
 130
 131 #undef  OPTIMIZATION_OPTIONS
 132 #define OPTIMIZATION_OPTIONS(LEVEL,SIZE)                \
 133   do {                                                  \
 134     extern int flag_signed_bitfields;                   \
 135     flag_signed_bitfields = 0;                          \
 136     optimization_options (LEVEL,SIZE);                  \
 137   } while (0)
 138
 139
 140 /* The normal location of the `ld' and `as' programs */
 141
 142 #undef MD_EXEC_PREFIX
 143 #define MD_EXEC_PREFIX "/usr/bin/"
 144
 145 /* The normal location of the various *crt*.o files is the */
 146
 147 #undef MD_STARTFILE_PREFIX
 148 #define MD_STARTFILE_PREFIX "/usr/lib/"
 149
 150 /* Macros to be automatically defined.
 151    __CLASSIFY_TYPE__ is used in the <varargs.h> and <stdarg.h> header
 152    files with DG/UX revision 5.40 and later.  This allows GNU CC to
 153    operate without installing the header files.  */
 154
 155 #undef  CPP_PREDEFINES
 156 #define CPP_PREDEFINES "-D__ix86 -Dunix -DDGUX -D__CLASSIFY_TYPE__=2\
 157    -Asystem=unix -Asystem=svr4"
 158
 159    /*
 160      If not -ansi, or restricting include files to one
 161      specific source target, specify full DG/UX features.
 162    */
 163 #undef  CPP_SPEC
 164 #define CPP_SPEC "%(cpp_cpu) %{!ansi:-D__OPEN_NAMESPACE__}"
 165
 166 /* Assembler support (legends for mxdb).  */
 167 #undef  ASM_SPEC
 168 #define ASM_SPEC "\
 169 %{mno-legend:%{mstandard:-Wc,off}}\
 170 %{g:%{!mno-legend:-Wc,-fix-bb,-s\"%i\",-lansi-c\
 171 %{mstandard:,-keep-std}\
 172 %{mexternal-legend:,-external}}}"
 173
 174 /* Override svr4.h.  */
 175
 176 /* hassey 3/12/94 keep svr4 ASM_FINAL_SPEC allows -pipe to work */
 177
 178 /* Linker and library spec's.
 179    -static, -shared, -symbolic, -h* and -z* access AT&T V.4 link options.
 180    -svr4 instructs gcc to place /usr/lib/values-X[cat].o on link the line.
 181    The absence of -msvr4 indicates linking done in a COFF environment and
 182    adds the link script to the link line.  In all environments, the first
 183    and last objects are crtbegin.o and crtend.o.
 184    When the -G link option is used (-shared and -symbolic) a final link is
 185    not being done.  */
 186
 187 #undef  LIB_SPEC
 188 #define LIB_SPEC \
 189 "%{!shared:%{!symbolic:-lc}}"
 190
 191 #undef  LINK_SPEC
 192 #define LINK_SPEC "%{z*} %{h*} %{v:-V} \
 193                    %{static:-dn -Bstatic} \
 194                    %{shared:-G -dy} \
 195                    %{symbolic:-Bsymbolic -G -dy} \
 196                    %{pg:-L/usr/lib/libp}%{p:-L/usr/lib/libp}"
 197
 198 #ifdef CROSS_COMPILE
 199
 200 #undef  STARTFILE_SPEC
 201 #define STARTFILE_SPEC "%{!shared:%{!symbolic:%{pg:gcrt1.o%s}           \
 202                                               %{!pg:%{p:mcrt1.o%s}      \
 203                                               %{!p:crt1.o%s}}}}         \
 204                          %{pg:gcrti.o%s}%{!pg:crti.o%s}                 \
 205                          crtbegin.o%s                                   \
 206                          %{ansi:values-Xc.o%s}                          \
 207                          %{!ansi:values-Xa.o%s}"
 208
 209 #undef  ENDFILE_SPEC
 210 #define ENDFILE_SPEC "crtend.o%s %{pg:gcrtn.o}%{!pg:crtn.o%s}"
 211
 212 #else
 213
 214 #undef  STARTFILE_SPEC
 215 #define STARTFILE_SPEC "%{!shared:%{!symbolic:%{pg:gcrt1.o%s}           \
 216                                               %{!pg:%{p:/lib/mcrt1.o%s} \
 217                                              %{!p:/lib/crt1.o%s}}}}    \
 218                        %{pg:gcrti.o%s}%{!pg:/lib/crti.o%s}           \
 219                         crtbegin.o%s                                    \
 220                         %{ansi:/lib/values-Xc.o%s}                      \
 221                         %{!ansi:/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,ALIGN)              \
 236 do {                                                    \
 237   if (flag_pic && symbolic_operand (RTX, VOIDmode))     \
 238     data_section ();                                    \
 239   else                                                  \
 240     readonly_data_section ();                           \
 241 } while (0)
 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 READONLY_DATA_SECTION_ASM_OP
 254 #define READONLY_DATA_SECTION_ASM_OP    "\t.section\t.rodata\n\t.align 1"