gcc/defaults.h

   1 /* Definitions of various defaults for tm.h macros.
   2    Copyright (C) 1992, 1996, 1997, 1998, 1999, 2000, 2001
   3    Free Software Foundation, Inc.
   4    Contributed by Ron Guilmette (rfg@monkeys.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 #ifndef GCC_DEFAULTS_H
  24 #define GCC_DEFAULTS_H
  25
  26 /* Store in OUTPUT a string (made with alloca) containing
  27    an assembler-name for a local static variable or function named NAME.
  28    LABELNO is an integer which is different for each call.  */
  29
  30 #ifndef ASM_FORMAT_PRIVATE_NAME
  31 #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO)                  \
  32   do {                                                                  \
  33     int len = strlen (NAME);                                            \
  34     char *temp = (char *) alloca (len + 3);                             \
  35     temp[0] = 'L';                                                      \
  36     strcpy (&temp[1], (NAME));                                          \
  37     temp[len + 1] = '.';                                                \
  38     temp[len + 2] = 0;                                                  \
  39     (OUTPUT) = (char *) alloca (strlen (NAME) + 11);                    \
  40     ASM_GENERATE_INTERNAL_LABEL (OUTPUT, temp, LABELNO);                \
  41   } while (0)
  42 #endif
  43
  44 #ifndef ASM_STABD_OP
  45 #define ASM_STABD_OP "\t.stabd\t"
  46 #endif
  47
  48 /* This is how to output an element of a case-vector that is absolute.
  49    Some targets don't use this, but we have to define it anyway.  */
  50
  51 #ifndef ASM_OUTPUT_ADDR_VEC_ELT
  52 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)  \
  53 do { fprintf (FILE, "\t%s\t", ASM_LONG);                                \
  54      ASM_OUTPUT_INTERNAL_LABEL (FILE, "L", (VALUE));                    \
  55      fputc ('\n', FILE);                                                \
  56    } while (0)
  57 #endif
  58
  59 /* Provide default for ASM_OUTPUT_ALTERNATE_LABEL_NAME.  */
  60 #ifndef ASM_OUTPUT_ALTERNATE_LABEL_NAME
  61 #define ASM_OUTPUT_ALTERNATE_LABEL_NAME(FILE,INSN) \
  62 do { ASM_OUTPUT_LABEL(FILE,LABEL_ALTERNATE_NAME (INSN)); } while (0)
  63 #endif
  64
  65 /* choose a reasonable default for ASM_OUTPUT_ASCII.  */
  66
  67 #ifndef ASM_OUTPUT_ASCII
  68 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
  69   do {                                                                        \
  70     FILE *_hide_asm_out_file = (MYFILE);                                      \
  71     const unsigned char *_hide_p = (const unsigned char *) (MYSTRING);        \
  72     int _hide_thissize = (MYLENGTH);                                          \
  73     {                                                                         \
  74       FILE *asm_out_file = _hide_asm_out_file;                                \
  75       const unsigned char *p = _hide_p;                                       \
  76       int thissize = _hide_thissize;                                          \
  77       int i;                                                                  \
  78       fprintf (asm_out_file, "\t.ascii \"");                                  \
  79                                                                               \
  80       for (i = 0; i < thissize; i++)                                          \
  81         {                                                                     \
  82           register int c = p[i];                                              \
  83           if (c == '\"' || c == '\\')                                         \
  84             putc ('\\', asm_out_file);                                        \
  85           if (ISPRINT(c))                                                     \
  86             putc (c, asm_out_file);                                           \
  87           else                                                                \
  88             {                                                                 \
  89               fprintf (asm_out_file, "\\%o", c);                              \
  90               /* After an octal-escape, if a digit follows,                   \
  91                  terminate one string constant and start another.             \
  92                  The Vax assembler fails to stop reading the escape           \
  93                  after three digits, so this is the only way we               \
  94                  can get it to parse the data properly.  */                   \
  95               if (i < thissize - 1 && ISDIGIT(p[i + 1]))                      \
  96                 fprintf (asm_out_file, "\"\n\t.ascii \"");                    \
  97           }                                                                   \
  98         }                                                                     \
  99       fprintf (asm_out_file, "\"\n");                                         \
 100     }                                                                         \
 101   }                                                                           \
 102   while (0)
 103 #endif
 104
 105 /* This is how we tell the assembler to equate two values.  */
 106 #ifdef SET_ASM_OP
 107 #ifndef ASM_OUTPUT_DEF
 108 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)                              \
 109  do {   fprintf ((FILE), "%s", SET_ASM_OP);                             \
 110         assemble_name (FILE, LABEL1);                                   \
 111         fprintf (FILE, ",");                                            \
 112         assemble_name (FILE, LABEL2);                                   \
 113         fprintf (FILE, "\n");                                           \
 114   } while (0)
 115 #endif
 116 #endif
 117
 118 /* This is how to output a reference to a user-level label named NAME.  */
 119
 120 #ifndef ASM_OUTPUT_LABELREF
 121 #define ASM_OUTPUT_LABELREF(FILE,NAME)  asm_fprintf ((FILE), "%U%s", (NAME))
 122 #endif
 123
 124 /* Allow target to print debug info labels specially.  This is useful for
 125    VLIW targets, since debug info labels should go into the middle of
 126    instruction bundles instead of breaking them.  */
 127
 128 #ifndef ASM_OUTPUT_DEBUG_LABEL
 129 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
 130   ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM)
 131 #endif
 132
 133 /* This determines whether or not we support weak symbols.  */
 134 #ifndef SUPPORTS_WEAK
 135 #ifdef ASM_WEAKEN_LABEL
 136 #define SUPPORTS_WEAK 1
 137 #else
 138 #define SUPPORTS_WEAK 0
 139 #endif
 140 #endif
 141
 142 /* This determines whether or not we support link-once semantics.  */
 143 #ifndef SUPPORTS_ONE_ONLY
 144 #ifdef MAKE_DECL_ONE_ONLY
 145 #define SUPPORTS_ONE_ONLY 1
 146 #else
 147 #define SUPPORTS_ONE_ONLY 0
 148 #endif
 149 #endif
 150
 151 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
 152    provide a weak attribute.  Else define it to nothing.
 153
 154    This would normally belong in gansidecl.h, but SUPPORTS_WEAK is
 155    not available at that time.
 156
 157    Note, this is only for use by target files which we know are to be
 158    compiled by GCC.  */
 159 #ifndef TARGET_ATTRIBUTE_WEAK
 160 # if SUPPORTS_WEAK
 161 #  define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
 162 # else
 163 #  define TARGET_ATTRIBUTE_WEAK
 164 # endif
 165 #endif
 166
 167 /* If the target supports init_priority C++ attribute, give
 168    SUPPORTS_INIT_PRIORITY a nonzero value.  */
 169 #ifndef SUPPORTS_INIT_PRIORITY
 170 #define SUPPORTS_INIT_PRIORITY 1
 171 #endif /* SUPPORTS_INIT_PRIORITY */
 172
 173 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
 174    the rest of the DWARF 2 frame unwind support is also provided.  */
 175 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
 176 #define DWARF2_UNWIND_INFO 1
 177 #endif
 178
 179 #if defined (DWARF2_UNWIND_INFO) && !defined (EH_FRAME_SECTION)
 180 # if defined (EH_FRAME_SECTION_ASM_OP)
 181 #  define EH_FRAME_SECTION() eh_frame_section ()
 182 # else
 183    /* If we aren't using crtstuff to run ctors, don't use it for EH.  */
 184 #  if defined (ASM_OUTPUT_SECTION_NAME) && defined (ASM_OUTPUT_CONSTRUCTOR)
 185 #   define EH_FRAME_SECTION_ASM_OP      "\t.section\t.eh_frame,\"aw\""
 186 #   define EH_FRAME_SECTION() \
 187      do { named_section (NULL_TREE, ".eh_frame", 0); } while (0)
 188 #  endif
 189 # endif
 190 #endif
 191
 192 /* If we have no definition for UNIQUE_SECTION, but do have the
 193    ability to generate arbitrary sections, construct something
 194    reasonable.  */
 195 #ifdef ASM_OUTPUT_SECTION_NAME
 196 #ifndef UNIQUE_SECTION
 197 #define UNIQUE_SECTION(DECL,RELOC)                              \
 198 do {                                                            \
 199   int len;                                                      \
 200   const char *name;                                             \
 201   char *string;                                                 \
 202                                                                 \
 203   name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (DECL));       \
 204   /* Strip off any encoding in name.  */                        \
 205   STRIP_NAME_ENCODING (name, name);                             \
 206                                                                 \
 207   len = strlen (name) + 1;                                      \
 208   string = alloca (len + 1);                                    \
 209   sprintf (string, ".%s", name);                                \
 210                                                                 \
 211   DECL_SECTION_NAME (DECL) = build_string (len, string);        \
 212 } while (0)
 213 #endif
 214 #ifndef UNIQUE_SECTION_P
 215 #define UNIQUE_SECTION_P(DECL) 0
 216 #endif
 217 #endif
 218
 219 /* By default, we generate a label at the beginning and end of the
 220    text section, and compute the size of the text section by
 221    subtracting the two.  However, on some platforms that doesn't
 222    work, and we use the section itself, rather than a label at the
 223    beginning of it, to indicate the start of the section.  On such
 224    platforms, define this to zero.  */
 225 #ifndef DWARF2_GENERATE_TEXT_SECTION_LABEL
 226 #define DWARF2_GENERATE_TEXT_SECTION_LABEL 1
 227 #endif
 228
 229 /* Supply a default definition for PROMOTE_PROTOTYPES.  */
 230 #ifndef PROMOTE_PROTOTYPES
 231 #define PROMOTE_PROTOTYPES      0
 232 #endif
 233
 234 /* Number of hardware registers that go into the DWARF-2 unwind info.
 235    If not defined, equals FIRST_PSEUDO_REGISTER  */
 236
 237 #ifndef DWARF_FRAME_REGISTERS
 238 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
 239 #endif
 240
 241 /* Default sizes for base C types.  If the sizes are different for
 242    your target, you should override these values by defining the
 243    appropriate symbols in your tm.h file.  */
 244
 245 #ifndef CHAR_TYPE_SIZE
 246 #define CHAR_TYPE_SIZE BITS_PER_UNIT
 247 #endif
 248
 249 #ifndef SHORT_TYPE_SIZE
 250 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
 251 #endif
 252
 253 #ifndef INT_TYPE_SIZE
 254 #define INT_TYPE_SIZE BITS_PER_WORD
 255 #endif
 256
 257 #ifndef LONG_TYPE_SIZE
 258 #define LONG_TYPE_SIZE BITS_PER_WORD
 259 #endif
 260
 261 #ifndef LONG_LONG_TYPE_SIZE
 262 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
 263 #endif
 264
 265 #ifndef WCHAR_TYPE_SIZE
 266 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
 267 #endif
 268
 269 #ifndef WCHAR_UNSIGNED
 270 #define WCHAR_UNSIGNED 0
 271 #endif
 272
 273 #ifndef FLOAT_TYPE_SIZE
 274 #define FLOAT_TYPE_SIZE BITS_PER_WORD
 275 #endif
 276
 277 #ifndef DOUBLE_TYPE_SIZE
 278 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 279 #endif
 280
 281 #ifndef LONG_DOUBLE_TYPE_SIZE
 282 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 283 #endif
 284
 285 #ifndef BUILD_VA_LIST_TYPE
 286 #define BUILD_VA_LIST_TYPE(X) ((X) = ptr_type_node)
 287 #endif
 288
 289 /* By default, the preprocessor should be invoked the same way in C++
 290    as in C.  */
 291 #ifndef CPLUSPLUS_CPP_SPEC
 292 #ifdef CPP_SPEC
 293 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
 294 #endif
 295 #endif
 296
 297 #endif  /* GCC_DEFAULTS_H */
 298