gcc/config/i386/cygming.h

   1 /* Operating system specific defines to be used when targeting GCC for
   2    hosting on Windows32, using a Unix style C library and tools.
   3    Copyright (C) 1995-2013 Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC 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 3, or (at your option)
  10 any later version.
  11
  12 GCC 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 GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #define DBX_DEBUGGING_INFO 1
  22 #define SDB_DEBUGGING_INFO 1
  23 #if TARGET_64BIT_DEFAULT || defined (HAVE_GAS_PE_SECREL32_RELOC)
  24 #define DWARF2_DEBUGGING_INFO 1
  25 #endif
  26
  27 #undef PREFERRED_DEBUGGING_TYPE
  28 #if (DWARF2_DEBUGGING_INFO)
  29 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
  30 #else
  31 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
  32 #endif
  33
  34 #undef TARGET_SEH
  35 #define TARGET_SEH  (TARGET_64BIT_MS_ABI && flag_unwind_tables)
  36
  37 /* Win64 with SEH cannot represent DRAP stack frames.  Disable its use.
  38    Force the use of different mechanisms to allocate aligned local data.  */
  39 #undef MAX_STACK_ALIGNMENT
  40 #define MAX_STACK_ALIGNMENT  (TARGET_SEH ? 128 : MAX_OFILE_ALIGNMENT)
  41
  42 /* Support hooks for SEH.  */
  43 #undef  TARGET_ASM_UNWIND_EMIT
  44 #define TARGET_ASM_UNWIND_EMIT  i386_pe_seh_unwind_emit
  45 #undef  TARGET_ASM_UNWIND_EMIT_BEFORE_INSN
  46 #define TARGET_ASM_UNWIND_EMIT_BEFORE_INSN  false
  47 #undef  TARGET_ASM_FUNCTION_END_PROLOGUE
  48 #define TARGET_ASM_FUNCTION_END_PROLOGUE  i386_pe_seh_end_prologue
  49 #undef  TARGET_ASM_EMIT_EXCEPT_PERSONALITY
  50 #define TARGET_ASM_EMIT_EXCEPT_PERSONALITY i386_pe_seh_emit_except_personality
  51 #undef  TARGET_ASM_INIT_SECTIONS
  52 #define TARGET_ASM_INIT_SECTIONS  i386_pe_seh_init_sections
  53 #define SUBTARGET_ASM_UNWIND_INIT  i386_pe_seh_init
  54
  55 #undef DEFAULT_ABI
  56 #define DEFAULT_ABI (TARGET_64BIT ? MS_ABI : SYSV_ABI)
  57
  58 #undef TARGET_PECOFF
  59 #define TARGET_PECOFF 1
  60
  61 #if ! defined (USE_MINGW64_LEADING_UNDERSCORES)
  62 #undef USER_LABEL_PREFIX
  63 #define USER_LABEL_PREFIX (TARGET_64BIT ? "" : "_")
  64
  65 #undef LOCAL_LABEL_PREFIX
  66 #define LOCAL_LABEL_PREFIX (TARGET_64BIT ? "." : "")
  67
  68 #undef ASM_GENERATE_INTERNAL_LABEL
  69 #define ASM_GENERATE_INTERNAL_LABEL(BUF,PREFIX,NUMBER)  \
  70   sprintf ((BUF), "*%s%s%ld", LOCAL_LABEL_PREFIX, \
  71            (PREFIX), (long)(NUMBER))
  72
  73 #undef LPREFIX
  74 #define LPREFIX (TARGET_64BIT ? ".L" : "L")
  75
  76 #endif
  77
  78 #undef DBX_REGISTER_NUMBER
  79 #define DBX_REGISTER_NUMBER(n)                          \
  80   (TARGET_64BIT ? dbx64_register_map[n]                 \
  81    : (write_symbols == DWARF2_DEBUG                     \
  82       ? svr4_dbx_register_map[n] : dbx_register_map[n]))
  83
  84 /* Map gcc register number to DWARF 2 CFA column number. For 32 bit
  85    target, always use the svr4_dbx_register_map for DWARF .eh_frame
  86    even if we don't use DWARF .debug_frame. */
  87 #undef DWARF_FRAME_REGNUM
  88 #define DWARF_FRAME_REGNUM(n)                           \
  89   (TARGET_64BIT ? dbx64_register_map[(n)]               \
  90                 : svr4_dbx_register_map[(n)])
  91
  92 /* The 64-bit MS_ABI changes the set of call-used registers.  */
  93 #undef DWARF_FRAME_REGISTERS
  94 #define DWARF_FRAME_REGISTERS (TARGET_64BIT ? 33 : 17)
  95
  96 #ifdef HAVE_GAS_PE_SECREL32_RELOC
  97 /* Use section relative relocations for debugging offsets.  Unlike
  98    other targets that fake this by putting the section VMA at 0, PE
  99    won't allow it.  */
 100 #define ASM_OUTPUT_DWARF_OFFSET(FILE, SIZE, LABEL, SECTION)     \
 101   do {                                                          \
 102     switch (SIZE)                                               \
 103       {                                                         \
 104       case 4:                                                   \
 105         fputs ("\t.secrel32\t", FILE);                          \
 106         assemble_name (FILE, LABEL);                            \
 107         break;                                                  \
 108       case 8:                                                   \
 109         /* This is a hack.  There is no 64-bit section relative \
 110            relocation.  However, the COFF format also does not  \
 111            support 64-bit file offsets; 64-bit applications are \
 112            limited to 32-bits of code+data in any one module.   \
 113            Fake the 64-bit offset by zero-extending it.  */     \
 114         fputs ("\t.secrel32\t", FILE);                          \
 115         assemble_name (FILE, LABEL);                            \
 116         fputs ("\n\t.long\t0", FILE);                           \
 117         break;                                                  \
 118       default:                                                  \
 119         gcc_unreachable ();                                     \
 120       }                                                         \
 121   } while (0)
 122 #endif
 123
 124 #define TARGET_EXECUTABLE_SUFFIX ".exe"
 125
 126 #define TARGET_OS_CPP_BUILTINS()                                        \
 127   do                                                                    \
 128     {                                                                   \
 129         if (!TARGET_64BIT)                                              \
 130           builtin_define ("_X86_=1");                                   \
 131         if (TARGET_SEH)                                                 \
 132           builtin_define ("__SEH__");                           \
 133         builtin_assert ("system=winnt");                                \
 134         builtin_define ("__stdcall=__attribute__((__stdcall__))");      \
 135         builtin_define ("__fastcall=__attribute__((__fastcall__))");    \
 136         builtin_define ("__thiscall=__attribute__((__thiscall__))");    \
 137         builtin_define ("__cdecl=__attribute__((__cdecl__))");          \
 138         if (!flag_iso)                                                  \
 139           {                                                             \
 140             builtin_define ("_stdcall=__attribute__((__stdcall__))");   \
 141             builtin_define ("_fastcall=__attribute__((__fastcall__))"); \
 142             builtin_define ("_thiscall=__attribute__((__thiscall__))"); \
 143             builtin_define ("_cdecl=__attribute__((__cdecl__))");       \
 144           }                                                             \
 145         /* Even though linkonce works with static libs, this is needed  \
 146             to compare typeinfo symbols across dll boundaries.  */      \
 147         builtin_define ("__GXX_MERGED_TYPEINFO_NAMES=0");               \
 148         builtin_define ("__GXX_TYPEINFO_EQUALITY_INLINE=0");            \
 149         EXTRA_OS_CPP_BUILTINS ();                                       \
 150   }                                                                     \
 151   while (0)
 152
 153 /* Get tree.c to declare a target-specific specialization of
 154    merge_decl_attributes.  */
 155 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 1
 156
 157 /* This macro defines names of additional specifications to put in the specs
 158    that can be used in various specifications like CC1_SPEC.  Its definition
 159    is an initializer with a subgrouping for each command option.
 160
 161    Each subgrouping contains a string constant, that defines the
 162    specification name, and a string constant that used by the GCC driver
 163    program.
 164
 165    Do not define this macro if it does not need to do anything.  */
 166
 167 #undef  SUBTARGET_EXTRA_SPECS
 168 #define SUBTARGET_EXTRA_SPECS                                           \
 169   { "mingw_include_path", DEFAULT_TARGET_MACHINE }
 170
 171 #undef MATH_LIBRARY
 172 #define MATH_LIBRARY ""
 173
 174 #undef TARGET_LIBC_HAS_FUNCTION
 175 #define TARGET_LIBC_HAS_FUNCTION no_c99_libc_has_function
 176
 177 #define SIZE_TYPE (TARGET_64BIT ? "long long unsigned int" : "unsigned int")
 178 #define PTRDIFF_TYPE (TARGET_64BIT ? "long long int" : "int")
 179
 180 #define WCHAR_TYPE_SIZE 16
 181 #define WCHAR_TYPE "short unsigned int"
 182
 183 /* Windows64 continues to use a 32-bit long type.  */
 184 #undef LONG_TYPE_SIZE
 185 #define LONG_TYPE_SIZE 32
 186 \f
 187 #define drectve_section() \
 188   (fprintf (asm_out_file, "\t.section .drectve\n"), \
 189    in_section = NULL)
 190
 191 /* Older versions of gas don't handle 'r' as data.
 192    Explicitly set data flag with 'd'.  */
 193 #define READONLY_DATA_SECTION_ASM_OP "\t.section .rdata,\"dr\""
 194
 195 /* Don't allow flag_pic to propagate since gas may produce invalid code
 196    otherwise.  */
 197
 198 #undef  SUBTARGET_OVERRIDE_OPTIONS
 199 #define SUBTARGET_OVERRIDE_OPTIONS                                      \
 200 do {                                                                    \
 201   if (TARGET_64BIT && flag_pic != 1)                                    \
 202     {                                                                   \
 203       if (flag_pic > 1)                                                 \
 204         warning (0,                                                     \
 205                  "-fPIC ignored for target (all code is position independent)"\
 206                  );                                                     \
 207       flag_pic = 1;                                                     \
 208     }                                                                   \
 209   else if (!TARGET_64BIT && flag_pic)                                   \
 210     {                                                                   \
 211       warning (0, "-f%s ignored for target (all code is position independent)",\
 212                (flag_pic > 1) ? "PIC" : "pic");                         \
 213       flag_pic = 0;                                                     \
 214     }                                                                   \
 215 } while (0)
 216
 217 /* Define this macro if references to a symbol must be treated
 218    differently depending on something about the variable or
 219    function named by the symbol (such as what section it is in).
 220
 221    On i386 running Windows NT, modify the assembler name with a suffix
 222    consisting of an atsign (@) followed by string of digits that represents
 223    the number of bytes of arguments passed to the function, if it has the
 224    attribute STDCALL.
 225
 226    In addition, we must mark dll symbols specially. Definitions of
 227    dllexport'd objects install some info in the .drectve section.
 228    References to dllimport'd objects are fetched indirectly via
 229    _imp__.  If both are declared, dllexport overrides.  This is also
 230    needed to implement one-only vtables: they go into their own
 231    section and we need to set DECL_SECTION_NAME so we do that here.
 232    Note that we can be called twice on the same decl.  */
 233
 234 #define SUBTARGET_ENCODE_SECTION_INFO  i386_pe_encode_section_info
 235
 236 /* Local and global relocs can be placed always into readonly memory
 237    for PE-COFF targets.  */
 238 #undef TARGET_ASM_RELOC_RW_MASK
 239 #define TARGET_ASM_RELOC_RW_MASK i386_pe_reloc_rw_mask
 240
 241 /* Output a common block.  */
 242 #undef ASM_OUTPUT_ALIGNED_DECL_COMMON
 243 #define ASM_OUTPUT_ALIGNED_DECL_COMMON \
 244   i386_pe_asm_output_aligned_decl_common
 245
 246 /* Output the label for an initialized variable.  */
 247 #undef ASM_DECLARE_OBJECT_NAME
 248 #define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL)     \
 249 do {                                                    \
 250   i386_pe_maybe_record_exported_symbol (DECL, NAME, 1); \
 251   ASM_OUTPUT_LABEL ((STREAM), (NAME));                  \
 252 } while (0)
 253
 254 /* Output a reference to a label. Fastcall function symbols
 255    keep their '@' prefix, while other symbols are prefixed
 256    with user_label_prefix.  */
 257 #undef ASM_OUTPUT_LABELREF
 258 #define  ASM_OUTPUT_LABELREF(STREAM, NAME)      \
 259 do {                                            \
 260   if ((NAME)[0] != FASTCALL_PREFIX)             \
 261     fputs (user_label_prefix, (STREAM));        \
 262   fputs ((NAME), (STREAM));                     \
 263 } while (0)
 264
 265 /* This does much the same in memory rather than to a stream.  */
 266 #undef TARGET_MANGLE_ASSEMBLER_NAME
 267 #define TARGET_MANGLE_ASSEMBLER_NAME i386_pe_mangle_assembler_name
 268
 269 \f
 270 /* Emit code to check the stack when allocating more than 4000
 271    bytes in one go.  */
 272 #define CHECK_STACK_LIMIT 4000
 273
 274 #undef STACK_BOUNDARY
 275 #define STACK_BOUNDARY  (TARGET_64BIT && ix86_abi == MS_ABI ? 128 : BITS_PER_WORD)
 276
 277 /* By default, target has a 80387, uses IEEE compatible arithmetic,
 278    returns float values in the 387 and needs stack probes.
 279    We also align doubles to 64-bits for MSVC default compatibility.  */
 280
 281 #undef TARGET_SUBTARGET_DEFAULT
 282 #define TARGET_SUBTARGET_DEFAULT \
 283         (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS \
 284          | MASK_STACK_PROBE | MASK_ALIGN_DOUBLE)
 285
 286 #undef TARGET_SUBTARGET64_DEFAULT
 287 #define TARGET_SUBTARGET64_DEFAULT \
 288         MASK_128BIT_LONG_DOUBLE
 289
 290 /* This is how to output an assembler line
 291    that says to advance the location counter
 292    to a multiple of 2**LOG bytes.  */
 293
 294 #undef ASM_OUTPUT_ALIGN
 295 #define ASM_OUTPUT_ALIGN(FILE,LOG)      \
 296     if ((LOG)!=0) fprintf ((FILE), "\t.align %d\n", 1<<(LOG))
 297
 298 /* Windows uses explicit import from shared libraries.  */
 299 #define MULTIPLE_SYMBOL_SPACES 1
 300
 301 #define TARGET_ASM_UNIQUE_SECTION i386_pe_unique_section
 302 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
 303
 304 #define SUPPORTS_ONE_ONLY 1
 305
 306 /* Switch into a generic section.  */
 307 #define TARGET_ASM_NAMED_SECTION  i386_pe_asm_named_section
 308
 309 /* Select attributes for named sections.  */
 310 #define TARGET_SECTION_TYPE_FLAGS  i386_pe_section_type_flags
 311
 312 /* Write the extra assembler code needed to declare a function
 313    properly.  If we are generating SDB debugging information, this
 314    will happen automatically, so we only need to handle other cases.  */
 315 #undef ASM_DECLARE_FUNCTION_NAME
 316 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
 317   i386_pe_start_function (FILE, NAME, DECL)
 318
 319 #undef ASM_DECLARE_FUNCTION_SIZE
 320 #define ASM_DECLARE_FUNCTION_SIZE(FILE,NAME,DECL) \
 321   i386_pe_end_function (FILE, NAME, DECL)
 322
 323 /* Add an external function to the list of functions to be declared at
 324    the end of the file.  */
 325 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME)                           \
 326   do                                                                    \
 327     {                                                                   \
 328       if (TREE_CODE (DECL) == FUNCTION_DECL)                            \
 329         i386_pe_record_external_function ((DECL), (NAME));              \
 330     }                                                                   \
 331   while (0)
 332
 333 /* Declare the type properly for any external libcall.  */
 334 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
 335   i386_pe_declare_function_type (FILE, XSTR (FUN, 0), 1)
 336
 337 /* This says out to put a global symbol in the BSS section.  */
 338 #undef ASM_OUTPUT_ALIGNED_BSS
 339 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
 340   asm_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
 341
 342 /* Put all *tf routines in libgcc.  */
 343 #undef LIBGCC2_HAS_TF_MODE
 344 #define LIBGCC2_HAS_TF_MODE 1
 345 #define LIBGCC2_TF_CEXT q
 346 #define TF_SIZE 113
 347
 348 /* Output function declarations at the end of the file.  */
 349 #undef TARGET_ASM_FILE_END
 350 #define TARGET_ASM_FILE_END i386_pe_file_end
 351
 352 #undef ASM_COMMENT_START
 353 #define ASM_COMMENT_START " #"
 354
 355 #ifndef DWARF2_UNWIND_INFO
 356 /* If configured with --disable-sjlj-exceptions, use DWARF2, else
 357    default to SJLJ.  */
 358 #if  (defined (CONFIG_SJLJ_EXCEPTIONS) && !CONFIG_SJLJ_EXCEPTIONS)
 359 /* The logic of this #if must be kept synchronised with the logic
 360    for selecting the tmake_eh_file fragment in config.gcc.  */
 361 #define DWARF2_UNWIND_INFO 1
 362 /* If multilib is selected break build as sjlj is required.  */
 363 #if defined (TARGET_BI_ARCH)
 364 #error For 64-bit windows and 32-bit based multilib version of gcc just SJLJ exceptions are supported.
 365 #endif
 366 #else
 367 #define DWARF2_UNWIND_INFO 0
 368 #endif
 369 #endif
 370
 371 /* Don't assume anything about the header files.  */
 372 #define NO_IMPLICIT_EXTERN_C
 373
 374 #undef PROFILE_HOOK
 375 #define PROFILE_HOOK(LABEL)                                             \
 376   if (MAIN_NAME_P (DECL_NAME (current_function_decl)))                  \
 377     {                                                                   \
 378       emit_call_insn (gen_rtx_CALL (VOIDmode,                           \
 379         gen_rtx_MEM (FUNCTION_MODE,                                     \
 380                      gen_rtx_SYMBOL_REF (Pmode, "_monstartup")),        \
 381         const0_rtx));                                                   \
 382     }
 383
 384 /* Java Native Interface (JNI) methods on Win32 are invoked using the
 385    stdcall calling convention.  */
 386 #undef MODIFY_JNI_METHOD_CALL
 387 #define MODIFY_JNI_METHOD_CALL(MDECL)                                         \
 388   build_type_attribute_variant ((MDECL),                                      \
 389                                build_tree_list (get_identifier ("stdcall"),   \
 390                                                 NULL))
 391
 392 /* For Win32 ABI compatibility */
 393 #undef DEFAULT_PCC_STRUCT_RETURN
 394 #define DEFAULT_PCC_STRUCT_RETURN 0
 395
 396 /* MSVC returns aggregate types of up to 8 bytes via registers.
 397    See i386.c:ix86_return_in_memory.  */
 398 #undef MS_AGGREGATE_RETURN
 399 #define MS_AGGREGATE_RETURN 1
 400
 401 /* Biggest alignment supported by the object file format of this
 402    machine.  Use this macro to limit the alignment which can be
 403    specified using the `__attribute__ ((aligned (N)))' construct.  If
 404    not defined, the default value is `BIGGEST_ALIGNMENT'.  */
 405 /* IMAGE_SCN_ALIGN_8192BYTES is the largest section alignment flag
 406    specified in the PECOFF60 spec.  Native MS compiler also limits
 407    user-specified alignment to 8192 bytes.  */
 408 #undef MAX_OFILE_ALIGNMENT
 409 #define MAX_OFILE_ALIGNMENT (8192 * 8)
 410
 411 /* BIGGEST_FIELD_ALIGNMENT macro is used directly by libobjc, There, we
 412    align internal doubles in structures on dword boundaries. Otherwise,
 413    support vector modes using ADJUST_FIELD_ALIGN, defined in i386.h.  */
 414 #ifdef IN_TARGET_LIBS
 415 #undef  BIGGEST_FIELD_ALIGNMENT
 416 #define BIGGEST_FIELD_ALIGNMENT 64
 417 #endif
 418
 419 /* A bit-field declared as `int' forces `int' alignment for the struct.  */
 420 #undef PCC_BITFIELD_TYPE_MATTERS
 421 #define PCC_BITFIELD_TYPE_MATTERS 1
 422 #define GROUP_BITFIELDS_BY_ALIGN TYPE_NATIVE(rec)
 423
 424 /* Enable alias attribute support.  */
 425 #ifndef SET_ASM_OP
 426 #define SET_ASM_OP "\t.set\t"
 427 #endif
 428
 429 /* This implements the `alias' attribute, keeping any stdcall or
 430    fastcall decoration.  */
 431 #undef  ASM_OUTPUT_DEF_FROM_DECLS
 432 #define ASM_OUTPUT_DEF_FROM_DECLS(STREAM, DECL, TARGET)                 \
 433   do                                                                    \
 434     {                                                                   \
 435       const char *alias                                                 \
 436         = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (DECL));              \
 437       i386_pe_maybe_record_exported_symbol (DECL, alias, 0);            \
 438       if (TREE_CODE (DECL) == FUNCTION_DECL)                            \
 439         i386_pe_declare_function_type (STREAM, alias,                   \
 440                                        TREE_PUBLIC (DECL));             \
 441       ASM_OUTPUT_DEF (STREAM, alias, IDENTIFIER_POINTER (TARGET));      \
 442     } while (0)
 443
 444 /* GNU as supports weak symbols on PECOFF. */
 445 #ifdef HAVE_GAS_WEAK
 446 #define ASM_WEAKEN_LABEL(FILE, NAME)  \
 447   do                                  \
 448     {                                 \
 449       fputs ("\t.weak\t", (FILE));    \
 450       assemble_name ((FILE), (NAME)); \
 451       fputc ('\n', (FILE));           \
 452     }                                 \
 453   while (0)
 454 #endif /* HAVE_GAS_WEAK */
 455
 456 /* FIXME: SUPPORTS_WEAK && TARGET_HAVE_NAMED_SECTIONS is true,
 457    but for .jcr section to work we also need crtbegin and crtend
 458    objects.  */
 459 #define TARGET_USE_JCR_SECTION 1
 460
 461 /* Decide whether it is safe to use a local alias for a virtual function
 462    when constructing thunks.  */
 463 #undef TARGET_USE_LOCAL_THUNK_ALIAS_P
 464 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) (!DECL_ONE_ONLY (DECL))
 465
 466 #define SUBTARGET_ATTRIBUTE_TABLE \
 467   { "selectany", 0, 0, true, false, false, ix86_handle_selectany_attribute, \
 468     false }
 469   /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler,
 470        affects_type_identity } */
 471
 472 /*  mcount() does not need a counter variable.  */
 473 #undef NO_PROFILE_COUNTERS
 474 #define NO_PROFILE_COUNTERS 1
 475
 476 #define TARGET_VALID_DLLIMPORT_ATTRIBUTE_P i386_pe_valid_dllimport_attribute_p
 477 #define TARGET_CXX_ADJUST_CLASS_AT_DEFINITION i386_pe_adjust_class_at_definition
 478 #define SUBTARGET_MANGLE_DECL_ASSEMBLER_NAME i386_pe_mangle_decl_assembler_name
 479
 480 #undef TARGET_ASM_ASSEMBLE_VISIBILITY
 481 #define TARGET_ASM_ASSEMBLE_VISIBILITY i386_pe_assemble_visibility
 482
 483 #undef SUB_TARGET_RECORD_STUB
 484 #define SUB_TARGET_RECORD_STUB i386_pe_record_stub
 485
 486 /* Static stack checking is supported by means of probes.  */
 487 #define STACK_CHECK_STATIC_BUILTIN 1