gcc/config/elfos.h

   1 /* elfos.h  --  operating system specific defines to be used when
   2    targeting GCC for some generic ELF system
   3    Copyright (C) 1991, 1994, 1995, 1999, 2000, 2001, 2002, 2003, 2004,
   4    2007, 2009 Free Software Foundation, Inc.
   5    Based on svr4.h contributed by Ron Guilmette (rfg@netcom.com).
   6
   7 This file is part of GCC.
   8
   9 GCC is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 3, or (at your option)
  12 any later version.
  13
  14 GCC is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 Under Section 7 of GPL version 3, you are granted additional
  20 permissions described in the GCC Runtime Library Exception, version
  21 3.1, as published by the Free Software Foundation.
  22
  23 You should have received a copy of the GNU General Public License and
  24 a copy of the GCC Runtime Library Exception along with this program;
  25 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  26 <http://www.gnu.org/licenses/>.  */
  27
  28 #define TARGET_OBJFMT_CPP_BUILTINS()            \
  29   do                                            \
  30     {                                           \
  31         builtin_define ("__ELF__");             \
  32     }                                           \
  33   while (0)
  34
  35 /* Define a symbol indicating that we are using elfos.h.
  36    Some CPU specific configuration files use this.  */
  37 #define USING_ELFOS_H
  38
  39 /* The prefix to add to user-visible assembler symbols.
  40
  41    For ELF systems the convention is *not* to prepend a leading
  42    underscore onto user-level symbol names.  */
  43
  44 #undef  USER_LABEL_PREFIX
  45 #define USER_LABEL_PREFIX ""
  46
  47 /* The biggest alignment supported by ELF in bits. 32-bit ELF
  48    supports section alignment up to (0x80000000 * 8), while
  49    64-bit ELF supports (0x8000000000000000 * 8). If this macro
  50    is not defined, the default is the largest alignment supported
  51    by 32-bit ELF and representable on a 32-bit host. Use this
  52    macro to limit the alignment which can be specified using
  53    the `__attribute__ ((aligned (N)))' construct.  */
  54 #ifndef MAX_OFILE_ALIGNMENT
  55 #define MAX_OFILE_ALIGNMENT (((unsigned int) 1 << 28) * 8)
  56 #endif
  57
  58 /* Use periods rather than dollar signs in special g++ assembler names.  */
  59
  60 #define NO_DOLLAR_IN_LABEL
  61
  62 /* Writing `int' for a bit-field forces int alignment for the structure.  */
  63
  64 #ifndef PCC_BITFIELD_TYPE_MATTERS
  65 #define PCC_BITFIELD_TYPE_MATTERS 1
  66 #endif
  67
  68 /* Handle #pragma weak and #pragma pack.  */
  69
  70 #define HANDLE_SYSV_PRAGMA 1
  71
  72 /* All ELF targets can support DWARF-2.  */
  73
  74 #define DWARF2_DEBUGGING_INFO 1
  75
  76 /* The GNU tools operate better with dwarf2, and it is required by some
  77    psABI's.  Since we don't have any native tools to be compatible with,
  78    default to dwarf2.  */
  79
  80 #ifndef PREFERRED_DEBUGGING_TYPE
  81 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
  82 #endif
  83
  84 /* All SVR4 targets use the ELF object file format.  */
  85 #define OBJECT_FORMAT_ELF
  86
  87
  88 /* Output #ident as a .ident.  */
  89
  90 #define ASM_OUTPUT_IDENT(FILE, NAME) \
  91   fprintf (FILE, "%s\"%s\"\n", IDENT_ASM_OP, NAME);
  92
  93 #define IDENT_ASM_OP "\t.ident\t"
  94
  95 #undef  SET_ASM_OP
  96 #define SET_ASM_OP      "\t.set\t"
  97
  98 /* Most svr4 assemblers want a .file directive at the beginning of
  99    their input file.  */
 100 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE true
 101
 102 /* This is how to allocate empty space in some section.  The .zero
 103    pseudo-op is used for this on most svr4 assemblers.  */
 104
 105 #define SKIP_ASM_OP     "\t.zero\t"
 106
 107 #undef  ASM_OUTPUT_SKIP
 108 #define ASM_OUTPUT_SKIP(FILE, SIZE) \
 109    fprintf ((FILE), "%s"HOST_WIDE_INT_PRINT_UNSIGNED"\n",\
 110             SKIP_ASM_OP, (SIZE))
 111
 112 /* This is how to store into the string LABEL
 113    the symbol_ref name of an internal numbered label where
 114    PREFIX is the class of label and NUM is the number within the class.
 115    This is suitable for output with `assemble_name'.
 116
 117    For most svr4 systems, the convention is that any symbol which begins
 118    with a period is not put into the linker symbol table by the assembler.  */
 119
 120 #undef  ASM_GENERATE_INTERNAL_LABEL
 121 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM)         \
 122   do                                                            \
 123     {                                                           \
 124       sprintf (LABEL, "*.%s%u", PREFIX, (unsigned) (NUM));      \
 125     }                                                           \
 126   while (0)
 127
 128 /* Output the label which precedes a jumptable.  Note that for all svr4
 129    systems where we actually generate jumptables (which is to say every
 130    svr4 target except i386, where we use casesi instead) we put the jump-
 131    tables into the .rodata section and since other stuff could have been
 132    put into the .rodata section prior to any given jumptable, we have to
 133    make sure that the location counter for the .rodata section gets pro-
 134    perly re-aligned prior to the actual beginning of the jump table.  */
 135
 136 #undef ALIGN_ASM_OP
 137 #define ALIGN_ASM_OP "\t.align\t"
 138
 139 #ifndef ASM_OUTPUT_BEFORE_CASE_LABEL
 140 #define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE, PREFIX, NUM, TABLE) \
 141   ASM_OUTPUT_ALIGN ((FILE), 2);
 142 #endif
 143
 144 #undef  ASM_OUTPUT_CASE_LABEL
 145 #define ASM_OUTPUT_CASE_LABEL(FILE, PREFIX, NUM, JUMPTABLE)             \
 146   do                                                                    \
 147     {                                                                   \
 148       ASM_OUTPUT_BEFORE_CASE_LABEL (FILE, PREFIX, NUM, JUMPTABLE)       \
 149         (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM);                  \
 150     }                                                                   \
 151   while (0)
 152
 153 /* The standard SVR4 assembler seems to require that certain builtin
 154    library routines (e.g. .udiv) be explicitly declared as .globl
 155    in each assembly file where they are referenced.  */
 156
 157 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN)  \
 158   (*targetm.asm_out.globalize_label) (FILE, XSTR (FUN, 0))
 159
 160 /* This says how to output assembler code to declare an
 161    uninitialized external linkage data object.  Under SVR4,
 162    the linker seems to want the alignment of data objects
 163    to depend on their types.  We do exactly that here.  */
 164
 165 #define COMMON_ASM_OP   "\t.comm\t"
 166
 167 #undef  ASM_OUTPUT_ALIGNED_COMMON
 168 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN)              \
 169   do                                                                    \
 170     {                                                                   \
 171       fprintf ((FILE), "%s", COMMON_ASM_OP);                            \
 172       assemble_name ((FILE), (NAME));                                   \
 173       fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n",          \
 174                (SIZE), (ALIGN) / BITS_PER_UNIT);                        \
 175     }                                                                   \
 176   while (0)
 177
 178 /* This says how to output assembler code to declare an
 179    uninitialized internal linkage data object.  Under SVR4,
 180    the linker seems to want the alignment of data objects
 181    to depend on their types.  We do exactly that here.  */
 182
 183 #define LOCAL_ASM_OP    "\t.local\t"
 184
 185 #undef  ASM_OUTPUT_ALIGNED_LOCAL
 186 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)       \
 187   do                                                            \
 188     {                                                           \
 189       fprintf ((FILE), "%s", LOCAL_ASM_OP);                     \
 190       assemble_name ((FILE), (NAME));                           \
 191       fprintf ((FILE), "\n");                                   \
 192       ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);      \
 193     }                                                           \
 194   while (0)
 195
 196 /* This is the pseudo-op used to generate a contiguous sequence of byte
 197    values from a double-quoted string WITHOUT HAVING A TERMINATING NUL
 198    AUTOMATICALLY APPENDED.  This is the same for most svr4 assemblers.  */
 199
 200 #undef  ASCII_DATA_ASM_OP
 201 #define ASCII_DATA_ASM_OP       "\t.ascii\t"
 202
 203 /* Support a read-only data section.  */
 204 #define READONLY_DATA_SECTION_ASM_OP    "\t.section\t.rodata"
 205
 206 /* On svr4, we *do* have support for the .init and .fini sections, and we
 207    can put stuff in there to be executed before and after `main'.  We let
 208    crtstuff.c and other files know this by defining the following symbols.
 209    The definitions say how to change sections to the .init and .fini
 210    sections.  This is the same for all known svr4 assemblers.  */
 211
 212 #define INIT_SECTION_ASM_OP     "\t.section\t.init"
 213 #define FINI_SECTION_ASM_OP     "\t.section\t.fini"
 214
 215 /* Output assembly directive to move to the beginning of current section.  */
 216 #ifdef HAVE_GAS_SUBSECTION_ORDERING
 217 # define ASM_SECTION_START_OP   "\t.subsection\t-1"
 218 # define ASM_OUTPUT_SECTION_START(FILE) \
 219   fprintf ((FILE), "%s\n", ASM_SECTION_START_OP)
 220 #endif
 221
 222 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
 223
 224 /* Switch into a generic section.  */
 225 #define TARGET_ASM_NAMED_SECTION  default_elf_asm_named_section
 226
 227 #undef  TARGET_ASM_SELECT_RTX_SECTION
 228 #define TARGET_ASM_SELECT_RTX_SECTION default_elf_select_rtx_section
 229 #undef  TARGET_ASM_SELECT_SECTION
 230 #define TARGET_ASM_SELECT_SECTION default_elf_select_section
 231 #undef  TARGET_HAVE_SWITCHABLE_BSS_SECTIONS
 232 #define TARGET_HAVE_SWITCHABLE_BSS_SECTIONS true
 233
 234 /* Define the strings used for the special svr4 .type and .size directives.
 235    These strings generally do not vary from one system running svr4 to
 236    another, but if a given system (e.g. m88k running svr) needs to use
 237    different pseudo-op names for these, they may be overridden in the
 238    file which includes this one.  */
 239
 240 #define TYPE_ASM_OP     "\t.type\t"
 241 #define SIZE_ASM_OP     "\t.size\t"
 242
 243 /* This is how we tell the assembler that a symbol is weak.  */
 244
 245 #define ASM_WEAKEN_LABEL(FILE, NAME)    \
 246   do                                    \
 247     {                                   \
 248       fputs ("\t.weak\t", (FILE));      \
 249       assemble_name ((FILE), (NAME));   \
 250       fputc ('\n', (FILE));             \
 251     }                                   \
 252   while (0)
 253
 254 /* The following macro defines the format used to output the second
 255    operand of the .type assembler directive.  Different svr4 assemblers
 256    expect various different forms for this operand.  The one given here
 257    is just a default.  You may need to override it in your machine-
 258    specific tm.h file (depending upon the particulars of your assembler).  */
 259
 260 #define TYPE_OPERAND_FMT        "@%s"
 261
 262 /* Write the extra assembler code needed to declare a function's result.
 263    Most svr4 assemblers don't require any special declaration of the
 264    result value, but there are exceptions.  */
 265
 266 #ifndef ASM_DECLARE_RESULT
 267 #define ASM_DECLARE_RESULT(FILE, RESULT)
 268 #endif
 269
 270 /* These macros generate the special .type and .size directives which
 271    are used to set the corresponding fields of the linker symbol table
 272    entries in an ELF object file under SVR4.  These macros also output
 273    the starting labels for the relevant functions/objects.  */
 274
 275 /* Write the extra assembler code needed to declare a function properly.
 276    Some svr4 assemblers need to also have something extra said about the
 277    function's return value.  We allow for that here.  */
 278
 279 #ifndef ASM_DECLARE_FUNCTION_NAME
 280 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)             \
 281   do                                                            \
 282     {                                                           \
 283       if (DECL_IS_IFUNC (DECL))                                 \
 284         ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME,                  \
 285                                    "gnu_indirect_function");    \
 286       else                                                      \
 287         ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function");     \
 288       ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL));            \
 289       ASM_OUTPUT_LABEL (FILE, NAME);                            \
 290     }                                                           \
 291   while (0)
 292 #endif
 293
 294 /* Write the extra assembler code needed to declare an object properly.  */
 295
 296 #ifdef HAVE_GAS_GNU_UNIQUE_OBJECT
 297 #define USE_GNU_UNIQUE_OBJECT 1
 298 #else
 299 #define USE_GNU_UNIQUE_OBJECT 0
 300 #endif
 301
 302 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                       \
 303   do                                                                    \
 304     {                                                                   \
 305       HOST_WIDE_INT size;                                               \
 306                                                                         \
 307       /* For template static data member instantiations or              \
 308          inline fn local statics, use gnu_unique_object so that         \
 309          they will be combined even under RTLD_LOCAL.  */               \
 310       if (USE_GNU_UNIQUE_OBJECT                                         \
 311           && !DECL_ARTIFICIAL (DECL) && DECL_ONE_ONLY (DECL))           \
 312         ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "gnu_unique_object");    \
 313       else                                                              \
 314         ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");               \
 315                                                                         \
 316       size_directive_output = 0;                                        \
 317       if (!flag_inhibit_size_directive                                  \
 318           && (DECL) && DECL_SIZE (DECL))                                \
 319         {                                                               \
 320           size_directive_output = 1;                                    \
 321           size = int_size_in_bytes (TREE_TYPE (DECL));                  \
 322           ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, size);                 \
 323         }                                                               \
 324                                                                         \
 325       ASM_OUTPUT_LABEL (FILE, NAME);                                    \
 326     }                                                                   \
 327   while (0)
 328
 329 /* Output the size directive for a decl in rest_of_decl_compilation
 330    in the case where we did not do so before the initializer.
 331    Once we find the error_mark_node, we know that the value of
 332    size_directive_output was set
 333    by ASM_DECLARE_OBJECT_NAME when it was run for the same decl.  */
 334
 335 #undef ASM_FINISH_DECLARE_OBJECT
 336 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END)\
 337   do                                                            \
 338     {                                                           \
 339       const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0);   \
 340       HOST_WIDE_INT size;                                       \
 341                                                                 \
 342       if (!flag_inhibit_size_directive                          \
 343           && DECL_SIZE (DECL)                                   \
 344           && ! AT_END && TOP_LEVEL                              \
 345           && DECL_INITIAL (DECL) == error_mark_node             \
 346           && !size_directive_output)                            \
 347         {                                                       \
 348           size_directive_output = 1;                            \
 349           size = int_size_in_bytes (TREE_TYPE (DECL));          \
 350           ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size);         \
 351         }                                                       \
 352     }                                                           \
 353   while (0)
 354
 355 /* This is how to declare the size of a function.  */
 356 #ifndef ASM_DECLARE_FUNCTION_SIZE
 357 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)            \
 358   do                                                            \
 359     {                                                           \
 360       if (!flag_inhibit_size_directive)                         \
 361         ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME);                 \
 362     }                                                           \
 363   while (0)
 364 #endif
 365
 366 /* A table of bytes codes used by the ASM_OUTPUT_ASCII and
 367    ASM_OUTPUT_LIMITED_STRING macros.  Each byte in the table
 368    corresponds to a particular byte value [0..255].  For any
 369    given byte value, if the value in the corresponding table
 370    position is zero, the given character can be output directly.
 371    If the table value is 1, the byte must be output as a \ooo
 372    octal escape.  If the tables value is anything else, then the
 373    byte value should be output as a \ followed by the value
 374    in the table.  Note that we can use standard UN*X escape
 375    sequences for many control characters, but we don't use
 376    \a to represent BEL because some svr4 assemblers (e.g. on
 377    the i386) don't know about that.  Also, we don't use \v
 378    since some versions of gas, such as 2.2 did not accept it.  */
 379
 380 #define ESCAPES \
 381 "\1\1\1\1\1\1\1\1btn\1fr\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
 382 \0\0\"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
 383 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\\\0\0\0\
 384 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\
 385 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
 386 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
 387 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
 388 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1"
 389
 390 /* Some svr4 assemblers have a limit on the number of characters which
 391    can appear in the operand of a .string directive.  If your assembler
 392    has such a limitation, you should define STRING_LIMIT to reflect that
 393    limit.  Note that at least some svr4 assemblers have a limit on the
 394    actual number of bytes in the double-quoted string, and that they
 395    count each character in an escape sequence as one byte.  Thus, an
 396    escape sequence like \377 would count as four bytes.
 397
 398    If your target assembler doesn't support the .string directive, you
 399    should define this to zero.
 400 */
 401
 402 #define STRING_LIMIT    ((unsigned) 256)
 403
 404 #define STRING_ASM_OP   "\t.string\t"
 405
 406 /* The routine used to output NUL terminated strings.  We use a special
 407    version of this for most svr4 targets because doing so makes the
 408    generated assembly code more compact (and thus faster to assemble)
 409    as well as more readable, especially for targets like the i386
 410    (where the only alternative is to output character sequences as
 411    comma separated lists of numbers).  */
 412
 413 #define ASM_OUTPUT_LIMITED_STRING(FILE, STR)            \
 414   do                                                    \
 415     {                                                   \
 416       register const unsigned char *_limited_str =      \
 417         (const unsigned char *) (STR);                  \
 418       register unsigned ch;                             \
 419                                                         \
 420       fprintf ((FILE), "%s\"", STRING_ASM_OP);          \
 421                                                         \
 422       for (; (ch = *_limited_str); _limited_str++)      \
 423         {                                               \
 424           register int escape;                          \
 425                                                         \
 426           switch (escape = ESCAPES[ch])                 \
 427             {                                           \
 428             case 0:                                     \
 429               putc (ch, (FILE));                        \
 430               break;                                    \
 431             case 1:                                     \
 432               fprintf ((FILE), "\\%03o", ch);           \
 433               break;                                    \
 434             default:                                    \
 435               putc ('\\', (FILE));                      \
 436               putc (escape, (FILE));                    \
 437               break;                                    \
 438             }                                           \
 439         }                                               \
 440                                                         \
 441       fprintf ((FILE), "\"\n");                         \
 442     }                                                   \
 443   while (0)
 444
 445 /* The routine used to output sequences of byte values.  We use a special
 446    version of this for most svr4 targets because doing so makes the
 447    generated assembly code more compact (and thus faster to assemble)
 448    as well as more readable.  Note that if we find subparts of the
 449    character sequence which end with NUL (and which are shorter than
 450    STRING_LIMIT) we output those using ASM_OUTPUT_LIMITED_STRING.  */
 451
 452 #undef  ASM_OUTPUT_ASCII
 453 #define ASM_OUTPUT_ASCII(FILE, STR, LENGTH)                             \
 454   do                                                                    \
 455     {                                                                   \
 456       const unsigned char *_ascii_bytes =                               \
 457         (const unsigned char *) (STR);                                  \
 458       const unsigned char *limit = _ascii_bytes + (LENGTH);             \
 459       const unsigned char *last_null = NULL;                            \
 460       unsigned bytes_in_chunk = 0;                                      \
 461                                                                         \
 462       for (; _ascii_bytes < limit; _ascii_bytes++)                      \
 463         {                                                               \
 464           const unsigned char *p;                                       \
 465                                                                         \
 466           if (bytes_in_chunk >= 60)                                     \
 467             {                                                           \
 468               fprintf ((FILE), "\"\n");                                 \
 469               bytes_in_chunk = 0;                                       \
 470             }                                                           \
 471                                                                         \
 472           if (_ascii_bytes > last_null)                                 \
 473             {                                                           \
 474               for (p = _ascii_bytes; p < limit && *p != '\0'; p++)      \
 475                 continue;                                               \
 476               last_null = p;                                            \
 477             }                                                           \
 478           else                                                          \
 479             p = last_null;                                              \
 480                                                                         \
 481           if (p < limit && (p - _ascii_bytes) <= (long)STRING_LIMIT)    \
 482             {                                                           \
 483               if (bytes_in_chunk > 0)                                   \
 484                 {                                                       \
 485                   fprintf ((FILE), "\"\n");                             \
 486                   bytes_in_chunk = 0;                                   \
 487                 }                                                       \
 488                                                                         \
 489               ASM_OUTPUT_LIMITED_STRING ((FILE), _ascii_bytes);         \
 490               _ascii_bytes = p;                                         \
 491             }                                                           \
 492           else                                                          \
 493             {                                                           \
 494               register int escape;                                      \
 495               register unsigned ch;                                     \
 496                                                                         \
 497               if (bytes_in_chunk == 0)                                  \
 498                 fprintf ((FILE), "%s\"", ASCII_DATA_ASM_OP);            \
 499                                                                         \
 500               switch (escape = ESCAPES[ch = *_ascii_bytes])             \
 501                 {                                                       \
 502                 case 0:                                                 \
 503                   putc (ch, (FILE));                                    \
 504                   bytes_in_chunk++;                                     \
 505                   break;                                                \
 506                 case 1:                                                 \
 507                   fprintf ((FILE), "\\%03o", ch);                       \
 508                   bytes_in_chunk += 4;                                  \
 509                   break;                                                \
 510                 default:                                                \
 511                   putc ('\\', (FILE));                                  \
 512                   putc (escape, (FILE));                                \
 513                   bytes_in_chunk += 2;                                  \
 514                   break;                                                \
 515                 }                                                       \
 516             }                                                           \
 517         }                                                               \
 518                                                                         \
 519       if (bytes_in_chunk > 0)                                           \
 520         fprintf ((FILE), "\"\n");                                       \
 521     }                                                                   \
 522   while (0)
 523
 524 /* Allow the use of the -frecord-gcc-switches switch via the
 525    elf_record_gcc_switches function defined in varasm.c.  */
 526 #undef  TARGET_ASM_RECORD_GCC_SWITCHES
 527 #define TARGET_ASM_RECORD_GCC_SWITCHES elf_record_gcc_switches
 528
 529 /* A C statement (sans semicolon) to output to the stdio stream STREAM
 530    any text necessary for declaring the name of an external symbol
 531    named NAME which is referenced in this compilation but not defined.
 532    It is needed to properly support non-default visibility.  */
 533
 534 #ifndef ASM_OUTPUT_EXTERNAL
 535 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
 536   default_elf_asm_output_external (FILE, DECL, NAME)
 537 #endif