gcc/defaults.h

   1 /* Definitions of various defaults for tm.h macros.
   2    Copyright (C) 1992, 1996, 1997, 1998, 1999, 2000, 2001, 2002
   3    Free Software Foundation, Inc.
   4    Contributed by Ron Guilmette (rfg@monkeys.com)
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 2, or (at your option) any later
  11 version.
  12
  13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING.  If not, write to the Free
  20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  21 02111-1307, USA.  */
  22
  23 #ifndef GCC_DEFAULTS_H
  24 #define GCC_DEFAULTS_H
  25
  26 /* Define default standard character escape sequences.  */
  27 #ifndef TARGET_BELL
  28 #  define TARGET_BELL 007
  29 #  define TARGET_BS 010
  30 #  define TARGET_TAB 011
  31 #  define TARGET_NEWLINE 012
  32 #  define TARGET_VT 013
  33 #  define TARGET_FF 014
  34 #  define TARGET_CR 015
  35 #  define TARGET_ESC 033
  36 #endif
  37
  38 /* When removal of CPP_PREDEFINES is complete, TARGET_CPU_CPP_BULITINS
  39    can also be removed from here.  */
  40 #ifndef TARGET_OS_CPP_BUILTINS
  41 # define TARGET_OS_CPP_BUILTINS()
  42 #endif
  43 #ifndef TARGET_CPU_CPP_BUILTINS
  44 # define TARGET_CPU_CPP_BUILTINS()
  45 #endif
  46 #ifndef CPP_PREDEFINES
  47 # define CPP_PREDEFINES ""
  48 #endif
  49
  50 /* Store in OUTPUT a string (made with alloca) containing
  51    an assembler-name for a local static variable or function named NAME.
  52    LABELNO is an integer which is different for each call.  */
  53
  54 #ifndef ASM_FORMAT_PRIVATE_NAME
  55 #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO)                  \
  56   do {                                                                  \
  57     int len = strlen (NAME);                                            \
  58     char *temp = (char *) alloca (len + 3);                             \
  59     temp[0] = 'L';                                                      \
  60     strcpy (&temp[1], (NAME));                                          \
  61     temp[len + 1] = '.';                                                \
  62     temp[len + 2] = 0;                                                  \
  63     (OUTPUT) = (char *) alloca (strlen (NAME) + 11);                    \
  64     ASM_GENERATE_INTERNAL_LABEL (OUTPUT, temp, LABELNO);                \
  65   } while (0)
  66 #endif
  67
  68 #ifndef ASM_STABD_OP
  69 #define ASM_STABD_OP "\t.stabd\t"
  70 #endif
  71
  72 /* This is how to output an element of a case-vector that is absolute.
  73    Some targets don't use this, but we have to define it anyway.  */
  74
  75 #ifndef ASM_OUTPUT_ADDR_VEC_ELT
  76 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)  \
  77 do { fputs (integer_asm_op (POINTER_SIZE / UNITS_PER_WORD, TRUE), FILE); \
  78      ASM_OUTPUT_INTERNAL_LABEL (FILE, "L", (VALUE));                    \
  79      fputc ('\n', FILE);                                                \
  80    } while (0)
  81 #endif
  82
  83 /* Provide default for ASM_OUTPUT_ALTERNATE_LABEL_NAME.  */
  84 #ifndef ASM_OUTPUT_ALTERNATE_LABEL_NAME
  85 #define ASM_OUTPUT_ALTERNATE_LABEL_NAME(FILE,INSN) \
  86 do { ASM_OUTPUT_LABEL(FILE,LABEL_ALTERNATE_NAME (INSN)); } while (0)
  87 #endif
  88
  89 /* choose a reasonable default for ASM_OUTPUT_ASCII.  */
  90
  91 #ifndef ASM_OUTPUT_ASCII
  92 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
  93   do {                                                                        \
  94     FILE *_hide_asm_out_file = (MYFILE);                                      \
  95     const unsigned char *_hide_p = (const unsigned char *) (MYSTRING);        \
  96     int _hide_thissize = (MYLENGTH);                                          \
  97     {                                                                         \
  98       FILE *asm_out_file = _hide_asm_out_file;                                \
  99       const unsigned char *p = _hide_p;                                       \
 100       int thissize = _hide_thissize;                                          \
 101       int i;                                                                  \
 102       fprintf (asm_out_file, "\t.ascii \"");                                  \
 103                                                                               \
 104       for (i = 0; i < thissize; i++)                                          \
 105         {                                                                     \
 106           int c = p[i];                                                       \
 107           if (c == '\"' || c == '\\')                                         \
 108             putc ('\\', asm_out_file);                                        \
 109           if (ISPRINT(c))                                                     \
 110             putc (c, asm_out_file);                                           \
 111           else                                                                \
 112             {                                                                 \
 113               fprintf (asm_out_file, "\\%o", c);                              \
 114               /* After an octal-escape, if a digit follows,                   \
 115                  terminate one string constant and start another.             \
 116                  The VAX assembler fails to stop reading the escape           \
 117                  after three digits, so this is the only way we               \
 118                  can get it to parse the data properly.  */                   \
 119               if (i < thissize - 1 && ISDIGIT(p[i + 1]))                      \
 120                 fprintf (asm_out_file, "\"\n\t.ascii \"");                    \
 121           }                                                                   \
 122         }                                                                     \
 123       fprintf (asm_out_file, "\"\n");                                         \
 124     }                                                                         \
 125   }                                                                           \
 126   while (0)
 127 #endif
 128
 129 /* This is how we tell the assembler to equate two values.  */
 130 #ifdef SET_ASM_OP
 131 #ifndef ASM_OUTPUT_DEF
 132 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)                              \
 133  do {   fprintf ((FILE), "%s", SET_ASM_OP);                             \
 134         assemble_name (FILE, LABEL1);                                   \
 135         fprintf (FILE, ",");                                            \
 136         assemble_name (FILE, LABEL2);                                   \
 137         fprintf (FILE, "\n");                                           \
 138   } while (0)
 139 #endif
 140 #endif
 141
 142 /* This is how to output a reference to a user-level label named NAME.  */
 143
 144 #ifndef ASM_OUTPUT_LABELREF
 145 #define ASM_OUTPUT_LABELREF(FILE,NAME)  asm_fprintf ((FILE), "%U%s", (NAME))
 146 #endif
 147
 148 /* Allow target to print debug info labels specially.  This is useful for
 149    VLIW targets, since debug info labels should go into the middle of
 150    instruction bundles instead of breaking them.  */
 151
 152 #ifndef ASM_OUTPUT_DEBUG_LABEL
 153 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
 154   ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM)
 155 #endif
 156
 157 /* This is how we tell the assembler that a symbol is weak.  */
 158 #ifndef ASM_OUTPUT_WEAK_ALIAS
 159 #if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF)
 160 #define ASM_OUTPUT_WEAK_ALIAS(STREAM, NAME, VALUE)      \
 161   do                                                    \
 162     {                                                   \
 163       ASM_WEAKEN_LABEL (STREAM, NAME);                  \
 164       if (VALUE)                                        \
 165         ASM_OUTPUT_DEF (STREAM, NAME, VALUE);           \
 166     }                                                   \
 167   while (0)
 168 #endif
 169 #endif
 170
 171 /* This determines whether or not we support weak symbols.  */
 172 #ifndef SUPPORTS_WEAK
 173 #if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
 174 #define SUPPORTS_WEAK 1
 175 #else
 176 #define SUPPORTS_WEAK 0
 177 #endif
 178 #endif
 179
 180 /* This determines whether or not we support link-once semantics.  */
 181 #ifndef SUPPORTS_ONE_ONLY
 182 #ifdef MAKE_DECL_ONE_ONLY
 183 #define SUPPORTS_ONE_ONLY 1
 184 #else
 185 #define SUPPORTS_ONE_ONLY 0
 186 #endif
 187 #endif
 188
 189 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
 190    provide a weak attribute.  Else define it to nothing.
 191
 192    This would normally belong in ansidecl.h, but SUPPORTS_WEAK is
 193    not available at that time.
 194
 195    Note, this is only for use by target files which we know are to be
 196    compiled by GCC.  */
 197 #ifndef TARGET_ATTRIBUTE_WEAK
 198 # if SUPPORTS_WEAK
 199 #  define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
 200 # else
 201 #  define TARGET_ATTRIBUTE_WEAK
 202 # endif
 203 #endif
 204
 205 /* If the target supports init_priority C++ attribute, give
 206    SUPPORTS_INIT_PRIORITY a nonzero value.  */
 207 #ifndef SUPPORTS_INIT_PRIORITY
 208 #define SUPPORTS_INIT_PRIORITY 1
 209 #endif /* SUPPORTS_INIT_PRIORITY */
 210
 211 /* If duplicate library search directories can be removed from a
 212    linker command without changing the linker's semantics, give this
 213    symbol a nonzero.  */
 214 #ifndef LINK_ELIMINATE_DUPLICATE_LDIRECTORIES
 215 #define LINK_ELIMINATE_DUPLICATE_LDIRECTORIES 0
 216 #endif /* LINK_ELIMINATE_DUPLICATE_LDIRECTORIES */
 217
 218 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
 219    the rest of the DWARF 2 frame unwind support is also provided.  */
 220 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
 221 #define DWARF2_UNWIND_INFO 1
 222 #endif
 223
 224 /* If we have named sections, and we're using crtstuff to run ctors,
 225    use them for registering eh frame information.  */
 226 #if defined (TARGET_ASM_NAMED_SECTION) && DWARF2_UNWIND_INFO \
 227     && !defined(EH_FRAME_IN_DATA_SECTION)
 228 #ifndef EH_FRAME_SECTION_NAME
 229 #define EH_FRAME_SECTION_NAME ".eh_frame"
 230 #endif
 231 #endif
 232
 233 /* If we have named section and we support weak symbols, then use the
 234    .jcr section for recording java classes which need to be registered
 235    at program start-up time.  */
 236 #if defined (TARGET_ASM_NAMED_SECTION) && SUPPORTS_WEAK
 237 #ifndef JCR_SECTION_NAME
 238 #define JCR_SECTION_NAME ".jcr"
 239 #endif
 240 #endif
 241
 242 /* By default, we generate a label at the beginning and end of the
 243    text section, and compute the size of the text section by
 244    subtracting the two.  However, on some platforms that doesn't
 245    work, and we use the section itself, rather than a label at the
 246    beginning of it, to indicate the start of the section.  On such
 247    platforms, define this to zero.  */
 248 #ifndef DWARF2_GENERATE_TEXT_SECTION_LABEL
 249 #define DWARF2_GENERATE_TEXT_SECTION_LABEL 1
 250 #endif
 251
 252 /* Supply a default definition for PROMOTE_PROTOTYPES.  */
 253 #ifndef PROMOTE_PROTOTYPES
 254 #define PROMOTE_PROTOTYPES      0
 255 #endif
 256
 257 /* Number of hardware registers that go into the DWARF-2 unwind info.
 258    If not defined, equals FIRST_PSEUDO_REGISTER  */
 259
 260 #ifndef DWARF_FRAME_REGISTERS
 261 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
 262 #endif
 263
 264 /* How to renumber registers for dbx and gdb.  If not defined, assume
 265    no renumbering is necessary.  */
 266
 267 #ifndef DBX_REGISTER_NUMBER
 268 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 269 #endif
 270
 271 /* Default sizes for base C types.  If the sizes are different for
 272    your target, you should override these values by defining the
 273    appropriate symbols in your tm.h file.  */
 274
 275 #ifndef BITS_PER_UNIT
 276 #define BITS_PER_UNIT 8
 277 #endif
 278
 279 #ifndef BITS_PER_WORD
 280 #define BITS_PER_WORD (BITS_PER_UNIT * UNITS_PER_WORD)
 281 #endif
 282
 283 #ifndef CHAR_TYPE_SIZE
 284 #define CHAR_TYPE_SIZE BITS_PER_UNIT
 285 #endif
 286
 287 #ifndef BOOL_TYPE_SIZE
 288 /* `bool' has size and alignment `1', on almost all platforms.  */
 289 #define BOOL_TYPE_SIZE CHAR_TYPE_SIZE
 290 #endif
 291
 292 #ifndef SHORT_TYPE_SIZE
 293 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
 294 #endif
 295
 296 #ifndef INT_TYPE_SIZE
 297 #define INT_TYPE_SIZE BITS_PER_WORD
 298 #endif
 299
 300 #ifndef LONG_TYPE_SIZE
 301 #define LONG_TYPE_SIZE BITS_PER_WORD
 302 #endif
 303
 304 #ifndef LONG_LONG_TYPE_SIZE
 305 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
 306 #endif
 307
 308 #ifndef WCHAR_TYPE_SIZE
 309 #define WCHAR_TYPE_SIZE INT_TYPE_SIZE
 310 #endif
 311
 312 #ifndef FLOAT_TYPE_SIZE
 313 #define FLOAT_TYPE_SIZE BITS_PER_WORD
 314 #endif
 315
 316 #ifndef DOUBLE_TYPE_SIZE
 317 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 318 #endif
 319
 320 #ifndef LONG_DOUBLE_TYPE_SIZE
 321 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
 322 #endif
 323
 324 /* Width in bits of a pointer.  Mind the value of the macro `Pmode'.  */
 325 #ifndef POINTER_SIZE
 326 #define POINTER_SIZE BITS_PER_WORD
 327 #endif
 328
 329 #ifndef BUILD_VA_LIST_TYPE
 330 #define BUILD_VA_LIST_TYPE(X) ((X) = ptr_type_node)
 331 #endif
 332
 333 #ifndef PIC_OFFSET_TABLE_REGNUM
 334 #define PIC_OFFSET_TABLE_REGNUM INVALID_REGNUM
 335 #endif
 336
 337 /* Type used by GCOV counters.  Use 64bit data type if target supports
 338    it.  */
 339 #if LONG_TYPE_SIZE >= 64
 340 #define GCOV_TYPE_SIZE LONG_TYPE_SIZE
 341 #else
 342 #define GCOV_TYPE_SIZE LONG_LONG_TYPE_SIZE
 343 #endif
 344
 345
 346 /* By default, the preprocessor should be invoked the same way in C++
 347    as in C.  */
 348 #ifndef CPLUSPLUS_CPP_SPEC
 349 #ifdef CPP_SPEC
 350 #define CPLUSPLUS_CPP_SPEC CPP_SPEC
 351 #endif
 352 #endif
 353
 354 #ifndef ACCUMULATE_OUTGOING_ARGS
 355 #define ACCUMULATE_OUTGOING_ARGS 0
 356 #endif
 357
 358 /* Supply a default definition for PUSH_ARGS.  */
 359 #ifndef PUSH_ARGS
 360 #ifdef PUSH_ROUNDING
 361 #define PUSH_ARGS       !ACCUMULATE_OUTGOING_ARGS
 362 #else
 363 #define PUSH_ARGS       0
 364 #endif
 365 #endif
 366
 367 /* If PREFERRED_STACK_BOUNDARY is not defined, set it to STACK_BOUNDARY.
 368    STACK_BOUNDARY is required.  */
 369 #ifndef PREFERRED_STACK_BOUNDARY
 370 #define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY
 371 #endif
 372
 373 /* By default, the C++ compiler will use function addresses in the
 374    vtable entries.  Setting this non-zero tells the compiler to use
 375    function descriptors instead.  The value of this macro says how
 376    many words wide the descriptor is (normally 2).  It is assumed
 377    that the address of a function descriptor may be treated as a
 378    pointer to a function.  */
 379 #ifndef TARGET_VTABLE_USES_DESCRIPTORS
 380 #define TARGET_VTABLE_USES_DESCRIPTORS 0
 381 #endif
 382
 383 /* By default, the vtable entries are void pointers, the so the alignment
 384    is the same as pointer alignment.  The value of this macro specifies
 385    the alignment of the vtable entry in bits.  It should be defined only
 386    when special alignment is necessary. */
 387 #ifndef TARGET_VTABLE_ENTRY_ALIGN
 388 #define TARGET_VTABLE_ENTRY_ALIGN POINTER_SIZE
 389 #endif
 390
 391 /* There are a few non-descriptor entries in the vtable at offsets below
 392    zero.  If these entries must be padded (say, to preserve the alignment
 393    specified by TARGET_VTABLE_ENTRY_ALIGN), set this to the number of
 394    words in each data entry.  */
 395 #ifndef TARGET_VTABLE_DATA_ENTRY_DISTANCE
 396 #define TARGET_VTABLE_DATA_ENTRY_DISTANCE 1
 397 #endif
 398
 399 /* Select a format to encode pointers in exception handling data.  We
 400    prefer those that result in fewer dynamic relocations.  Assume no
 401    special support here and encode direct references.  */
 402 #ifndef ASM_PREFERRED_EH_DATA_FORMAT
 403 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)  DW_EH_PE_absptr
 404 #endif
 405
 406 /* By default, the C++ compiler will use the lowest bit of the pointer
 407    to function to indicate a pointer-to-member-function points to a
 408    virtual member function.  However, if FUNCTION_BOUNDARY indicates
 409    function addresses aren't always even, the lowest bit of the delta
 410    field will be used.  */
 411 #ifndef TARGET_PTRMEMFUNC_VBIT_LOCATION
 412 #define TARGET_PTRMEMFUNC_VBIT_LOCATION \
 413   (FUNCTION_BOUNDARY >= 2 * BITS_PER_UNIT \
 414    ? ptrmemfunc_vbit_in_pfn : ptrmemfunc_vbit_in_delta)
 415 #endif
 416
 417 #ifndef DEFAULT_GDB_EXTENSIONS
 418 #define DEFAULT_GDB_EXTENSIONS 1
 419 #endif
 420
 421 /* If more than one debugging type is supported, you must define
 422    PREFERRED_DEBUGGING_TYPE to choose a format in a system-dependent way.
 423
 424    This is one long line cause VAXC can't handle a \-newline.  */
 425 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF_DEBUGGING_INFO) + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO) + defined (VMS_DEBUGGING_INFO))
 426 #ifndef PREFERRED_DEBUGGING_TYPE
 427 You Lose!  You must define PREFERRED_DEBUGGING_TYPE!
 428 #endif /* no PREFERRED_DEBUGGING_TYPE */
 429 #else /* Only one debugging format supported.  Define PREFERRED_DEBUGGING_TYPE
 430          so other code needn't care.  */
 431 #ifdef DBX_DEBUGGING_INFO
 432 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 433 #endif
 434 #ifdef SDB_DEBUGGING_INFO
 435 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
 436 #endif
 437 #ifdef DWARF_DEBUGGING_INFO
 438 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
 439 #endif
 440 #ifdef DWARF2_DEBUGGING_INFO
 441 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 442 #endif
 443 #ifdef VMS_DEBUGGING_INFO
 444 #define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
 445 #endif
 446 #ifdef XCOFF_DEBUGGING_INFO
 447 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
 448 #endif
 449 #endif /* More than one debugger format enabled.  */
 450
 451 /* If still not defined, must have been because no debugging formats
 452    are supported.  */
 453 #ifndef PREFERRED_DEBUGGING_TYPE
 454 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
 455 #endif
 456
 457 /* This is set to 1 if BYTES_BIG_ENDIAN is defined but the target uses a
 458    little-endian method of passing and returning structures in registers.
 459    On the HP-UX IA64 and PA64 platforms structures are aligned differently
 460    then integral values and setting this value to 1 will allow for the
 461    special handling of structure arguments and return values in regs.  */
 462
 463 #ifndef FUNCTION_ARG_REG_LITTLE_ENDIAN
 464 #define FUNCTION_ARG_REG_LITTLE_ENDIAN 0
 465 #endif
 466
 467 /* Determine the register class for registers suitable to be the base
 468    address register in a MEM.  Allow the choice to be dependent upon
 469    the mode of the memory access.  */
 470 #ifndef MODE_BASE_REG_CLASS
 471 #define MODE_BASE_REG_CLASS(MODE) BASE_REG_CLASS
 472 #endif
 473
 474 #ifndef LARGEST_EXPONENT_IS_NORMAL
 475 #define LARGEST_EXPONENT_IS_NORMAL(SIZE) 0
 476 #endif
 477
 478 #ifndef ROUND_TOWARDS_ZERO
 479 #define ROUND_TOWARDS_ZERO 0
 480 #endif
 481
 482 #ifndef MODE_HAS_NANS
 483 #define MODE_HAS_NANS(MODE)                                     \
 484   (FLOAT_MODE_P (MODE)                                          \
 485    && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT                  \
 486    && !LARGEST_EXPONENT_IS_NORMAL (GET_MODE_BITSIZE (MODE)))
 487 #endif
 488
 489 #ifndef MODE_HAS_INFINITIES
 490 #define MODE_HAS_INFINITIES(MODE)                               \
 491   (FLOAT_MODE_P (MODE)                                          \
 492    && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT                  \
 493    && !LARGEST_EXPONENT_IS_NORMAL (GET_MODE_BITSIZE (MODE)))
 494 #endif
 495
 496 #ifndef MODE_HAS_SIGNED_ZEROS
 497 #define MODE_HAS_SIGNED_ZEROS(MODE) \
 498   (FLOAT_MODE_P (MODE) && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT)
 499 #endif
 500
 501 #ifndef MODE_HAS_SIGN_DEPENDENT_ROUNDING
 502 #define MODE_HAS_SIGN_DEPENDENT_ROUNDING(MODE)                  \
 503   (FLOAT_MODE_P (MODE)                                          \
 504    && TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT                  \
 505    && !ROUND_TOWARDS_ZERO)
 506 #endif
 507
 508 #ifndef HOT_TEXT_SECTION_NAME
 509 #define HOT_TEXT_SECTION_NAME "text.hot"
 510 #endif
 511
 512 #ifndef UNLIKELY_EXECUTED_TEXT_SECTION_NAME
 513 #define UNLIKELY_EXECUTED_TEXT_SECTION_NAME "text.unlikely"
 514 #endif
 515
 516 #ifndef VECTOR_MODE_SUPPORTED_P
 517 #define VECTOR_MODE_SUPPORTED_P(MODE) 0
 518 #endif
 519
 520 /* Determine whether __cxa_atexit, rather than atexit, is used to
 521    register C++ destructors for local statics and global objects. */
 522 #ifndef DEFAULT_USE_CXA_ATEXIT
 523 #define DEFAULT_USE_CXA_ATEXIT 0
 524 #endif
 525
 526 #endif  /* ! GCC_DEFAULTS_H */