gcc/config/pa/pa64-hpux.h

   1 /* Definitions of target machine for GNU compiler, for HPs running
   2    HPUX using the 64bit runtime model.
   3    Copyright (C) 1999, 2000, 2001, 2002, 2004, 2005, 2007, 2008, 2010
   4    Free Software Foundation, Inc.
   5
   6 This file is part of GCC.
   7
   8 GCC 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 3, or (at your option)
  11 any later version.
  12
  13 GCC 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 GCC; see the file COPYING3.  If not see
  20 <http://www.gnu.org/licenses/>.  */
  21
  22 /* We can debug dynamically linked executables on hpux11; we also
  23    want dereferencing of a NULL pointer to cause a SEGV.  Do not move
  24    the "+Accept TypeMismatch" switch.  We check for it in collect2
  25    to determine which init/fini is needed.  */
  26 #undef LINK_SPEC
  27 #if ((TARGET_DEFAULT | TARGET_CPU_DEFAULT) & MASK_GNU_LD)
  28 #define LINK_SPEC \
  29   "%{!shared:%{p:-L/lib/pa20_64/libp -L/usr/lib/pa20_64/libp %{!static:\
  30      %nwarning: consider linking with '-static' as system libraries with\n\
  31      %n  profiling support are only provided in archive format}}}\
  32    %{!shared:%{pg:-L/lib/pa20_64/libp -L/usr/lib/pa20_64/libp %{!static:\
  33      %nwarning: consider linking with '-static' as system libraries with\n\
  34      %n  profiling support are only provided in archive format}}}\
  35    %{!shared:%{!static:%{rdynamic:-E}}}\
  36    %{mhp-ld:+Accept TypeMismatch -z} %{mlinker-opt:-O}\
  37    %{!shared:-u main %{!nostdlib:%{!nodefaultlibs:-u __cxa_finalize}}}\
  38    %{static:-a archive} %{shared:%{mhp-ld:-b}%{!mhp-ld:-shared}}"
  39 #else
  40 #define LINK_SPEC \
  41   "%{!shared:%{p:-L/lib/pa20_64/libp -L/usr/lib/pa20_64/libp %{!static:\
  42      %nwarning: consider linking with '-static' as system libraries with\n\
  43      %n  profiling support are only provided in archive format}}}\
  44    %{!shared:%{pg:-L/lib/pa20_64/libp -L/usr/lib/pa20_64/libp %{!static:\
  45      %nwarning: consider linking with '-static' as system libraries with\n\
  46      %n  profiling support are only provided in archive format}}}\
  47    %{!shared:%{!static:%{rdynamic:-E}}}\
  48    %{!mgnu-ld:+Accept TypeMismatch -z} %{mlinker-opt:-O}\
  49    %{!shared:-u main %{!nostdlib:%{!nodefaultlibs:-u __cxa_finalize}}}\
  50    %{static:-a archive} %{shared:%{mgnu-ld:-shared}%{!mgnu-ld:-b}}"
  51 #endif
  52
  53 /* Profiling support is only provided in libc.a.  However, libprof and
  54    libgprof are only available in shared form on HP-UX 11.00.  We use
  55    the shared form if we are using the GNU linker or an archive form
  56    isn't available.  We also usually need to link with libdld and it's
  57    only available in shared form.  */
  58 #undef LIB_SPEC
  59 #if ((TARGET_DEFAULT | TARGET_CPU_DEFAULT) & MASK_GNU_LD)
  60 #define LIB_SPEC \
  61   "%{!shared:\
  62      %{!p:%{!pg:%{fopenmp:%{static:-a shared} -lrt %{static:-a archive}}\
  63             %{mt|pthread:-lpthread} -lc\
  64             %{static:%{!nolibdld:-a shared -ldld -a archive -lc}\
  65                 %{!mt:%{!pthread:-a shared -lc -a archive}}}}}\
  66      %{p:%{!pg:%{static:%{!mhp-ld:-a shared}%{mhp-ld:-a archive_shared}}\
  67            -lprof %{static:-a archive}\
  68            %{fopenmp:%{static:-a shared} -lrt %{static:-a archive}}\
  69            %{mt|pthread:-lpthread} -lc\
  70            %{static:%{!nolibdld:-a shared -ldld -a archive -lc}\
  71                 %{!mt:%{!pthread:-a shared -lc -a archive}}}}}\
  72      %{pg:%{static:%{!mhp-ld:-a shared}%{mhp-ld:-a archive_shared}}\
  73        -lgprof %{static:-a archive}\
  74        %{fopenmp:%{static:-a shared} -lrt %{static:-a archive}}\
  75        %{mt|pthread:-lpthread} -lc\
  76        %{static:%{!nolibdld:-a shared -ldld -a archive -lc}\
  77                 %{!mt:%{!pthread:-a shared -lc -a archive}}}}}\
  78    %{shared:%{mt|pthread:-lpthread}}"
  79 #else
  80 #define LIB_SPEC \
  81   "%{!shared:\
  82      %{!p:%{!pg:%{fopenmp:%{static:-a shared} -lrt %{static:-a archive}}\
  83             %{mt|pthread:-lpthread} -lc\
  84             %{static:%{!nolibdld:-a shared -ldld -a archive -lc}\
  85                 %{!mt:%{!pthread:-a shared -lc -a archive}}}}}\
  86      %{p:%{!pg:%{static:%{mgnu-ld:-a shared}%{!mgnu-ld:-a archive_shared}}\
  87            -lprof %{static:-a archive}\
  88            %{fopenmp:%{static:-a shared} -lrt %{static:-a archive}}\
  89            %{mt|pthread:-lpthread} -lc\
  90            %{static:%{!nolibdld:-a shared -ldld -a archive -lc}\
  91                 %{!mt:%{!pthread:-a shared -lc -a archive}}}}}\
  92      %{pg:%{static:%{mgnu-ld:-a shared}%{!mgnu-ld:-a archive_shared}}\
  93        -lgprof %{static:-a archive}\
  94        %{fopenmp:%{static:-a shared} -lrt %{static:-a archive}}\
  95        %{mt|pthread:-lpthread} -lc\
  96        %{static:%{!nolibdld:-a shared -ldld -a archive -lc}\
  97                 %{!mt:%{!pthread:-a shared -lc -a archive}}}}}\
  98    %{shared:%{mt|pthread:-lpthread}}"
  99 #endif
 100
 101 /* The libgcc_stub.a and milli.a libraries need to come last.  */
 102 #undef LINK_GCC_C_SEQUENCE_SPEC
 103 #define LINK_GCC_C_SEQUENCE_SPEC "\
 104   %G %L %G %{!nostdlib:%{!nodefaultlibs:%{!shared:-lgcc_stub}\
 105   milli.a%s}}"
 106
 107 /* Under hpux11, the normal location of the `ld' and `as' programs is the
 108    /usr/ccs/bin directory.  */
 109
 110 #ifndef CROSS_DIRECTORY_STRUCTURE
 111 #undef MD_EXEC_PREFIX
 112 #define MD_EXEC_PREFIX "/usr/ccs/bin"
 113 #endif
 114
 115 /* Default prefixes.  */
 116
 117 #undef STANDARD_STARTFILE_PREFIX_1
 118 #define STANDARD_STARTFILE_PREFIX_1 "/lib/pa20_64/"
 119
 120 #undef STANDARD_STARTFILE_PREFIX_2
 121 #define STANDARD_STARTFILE_PREFIX_2 "/usr/lib/pa20_64/"
 122
 123 /* Under hpux11 the normal location of the various pa20_64 *crt*.o files
 124    is the /usr/ccs/lib/pa20_64 directory.  Some files may also be in the
 125    /opt/langtools/lib/pa20_64 directory.  */
 126
 127 #ifndef CROSS_DIRECTORY_STRUCTURE
 128 #undef MD_STARTFILE_PREFIX
 129 #define MD_STARTFILE_PREFIX "/usr/ccs/lib/pa20_64/"
 130 #endif
 131
 132 #ifndef CROSS_DIRECTORY_STRUCTURE
 133 #undef MD_STARTFILE_PREFIX_1
 134 #define MD_STARTFILE_PREFIX_1 "/opt/langtools/lib/pa20_64/"
 135 #endif
 136
 137 /* This macro specifies the biggest alignment supported by the object
 138    file format of this machine.
 139
 140    The .align directive in the HP assembler allows alignments up to
 141    4096 bytes.  However, the maximum alignment of a global common symbol
 142    is 16 bytes using HP ld.  Unfortunately, this macro doesn't provide
 143    a method to check for common symbols.  */
 144 #undef MAX_OFILE_ALIGNMENT
 145 #define MAX_OFILE_ALIGNMENT 32768
 146
 147 /* Due to limitations in the target structure, it isn't currently possible
 148    to dynamically switch between the GNU and HP assemblers.  */
 149 #undef TARGET_GAS
 150
 151 /* Configure selects the standard ELFOS defines for use with GAS.  */
 152 #ifdef USING_ELFOS_H
 153
 154 /* We are using GAS.  */
 155 #define TARGET_GAS 1
 156
 157 #undef TARGET_ASM_FILE_START
 158 #define TARGET_ASM_FILE_START pa_hpux64_gas_file_start
 159
 160 /* This is how we output a null terminated string.  */
 161 #undef STRING_ASM_OP
 162 #define STRING_ASM_OP   "\t.stringz\t"
 163
 164 #define TEXT_SECTION_ASM_OP     "\t.text"
 165 #define DATA_SECTION_ASM_OP     "\t.data"
 166 #define BSS_SECTION_ASM_OP      "\t.section\t.bss"
 167
 168 #define JCR_SECTION_NAME        ".jcr"
 169
 170 #define HP_INIT_ARRAY_SECTION_ASM_OP    "\t.section\t.init"
 171 #define GNU_INIT_ARRAY_SECTION_ASM_OP   "\t.section\t.init_array"
 172 #define HP_FINI_ARRAY_SECTION_ASM_OP    "\t.section\t.fini"
 173 #define GNU_FINI_ARRAY_SECTION_ASM_OP   "\t.section\t.fini_array"
 174
 175 /* We need to override the following two macros defined in elfos.h since
 176    the .comm directive has a different syntax and it can't be used for
 177    local common symbols.  */
 178 #undef ASM_OUTPUT_ALIGNED_COMMON
 179 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN)              \
 180   pa_asm_output_aligned_common (FILE, NAME, SIZE, ALIGN)
 181
 182 #undef ASM_OUTPUT_ALIGNED_LOCAL
 183 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 184   pa_asm_output_aligned_local (FILE, NAME, SIZE, ALIGN)
 185
 186 /* The define in pa.h doesn't work with the alias attribute.  The
 187    default is ok with the following define for GLOBAL_ASM_OP.  */
 188 #undef TARGET_ASM_GLOBALIZE_LABEL
 189
 190 /* This is how we globalize a label.  */
 191 #define GLOBAL_ASM_OP   "\t.globl\t"
 192
 193 /* Hacked version from defaults.h that uses assemble_name_raw
 194    instead of assemble_name.  A symbol in a type directive that
 195    isn't otherwise referenced doesn't cause the symbol to be
 196    placed in the symbol table of the assembled object.  */
 197 #undef ASM_OUTPUT_TYPE_DIRECTIVE
 198 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE)           \
 199 do {                                                            \
 200   fputs (TYPE_ASM_OP, STREAM);                                  \
 201   assemble_name_raw (STREAM, NAME);                             \
 202   fputs (", ", STREAM);                                         \
 203   fprintf (STREAM, TYPE_OPERAND_FMT, TYPE);                     \
 204   putc ('\n', STREAM);                                          \
 205 } while (0)
 206
 207 /* Hacked version from elfos.h that doesn't output a label.  */
 208 #undef ASM_DECLARE_FUNCTION_NAME
 209 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)             \
 210 do {                                                            \
 211   ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function");           \
 212   ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL));                \
 213 } while (0)
 214
 215 /* The type of external references must be set correctly for the
 216    dynamic loader to work correctly.  This is equivalent to the
 217    HP assembler's .IMPORT directive but relates more directly to
 218    ELF object file types.  */
 219 #undef ASM_OUTPUT_EXTERNAL
 220 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME)                   \
 221   pa_hpux_asm_output_external ((FILE), (DECL), (NAME))
 222 #define ASM_OUTPUT_EXTERNAL_REAL(FILE, DECL, NAME)              \
 223 do {                                                            \
 224   if (FUNCTION_NAME_P (NAME))                                   \
 225     ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function");         \
 226   else                                                          \
 227     ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");           \
 228   default_elf_asm_output_external (FILE, DECL, NAME);           \
 229 } while (0)
 230
 231 /* We need set the type for external libcalls.  Also note that not all
 232    libcall names are passed to targetm.encode_section_info (e.g., __main).
 233    Thus, we also have to do the section encoding if it hasn't been done
 234    already.  */
 235 #undef ASM_OUTPUT_EXTERNAL_LIBCALL
 236 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN)                  \
 237 do {                                                            \
 238   if (!FUNCTION_NAME_P (XSTR (FUN, 0)))                         \
 239     hppa_encode_label (FUN);                                    \
 240   ASM_OUTPUT_TYPE_DIRECTIVE (FILE, XSTR (FUN, 0), "function");  \
 241 } while (0)
 242
 243 /* We need to use the HP style for internal labels.  */
 244 #undef ASM_GENERATE_INTERNAL_LABEL
 245 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
 246   sprintf (LABEL, "*%c$%s%04ld", (PREFIX)[0], (PREFIX) + 1, (long)(NUM))
 247
 248 #else /* USING_ELFOS_H */
 249
 250 /* We are not using GAS.  */
 251 #define TARGET_GAS 0
 252
 253 /* HPUX 11 has the "new" HP assembler.  It's still lousy, but it's a whole
 254    lot better than the assembler shipped with older versions of hpux.
 255    However, it doesn't support weak symbols and is a bad fit with ELF.  */
 256 #undef NEW_HP_ASSEMBLER
 257 #define NEW_HP_ASSEMBLER 1
 258
 259 /* It looks like DWARF2 will be the easiest debug format to handle on this
 260    platform.  */
 261 #define DWARF2_DEBUGGING_INFO 1
 262 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 263
 264 /* This target uses the ELF object file format.  */
 265 #define OBJECT_FORMAT_ELF
 266
 267 #undef TARGET_ASM_FILE_START
 268 #define TARGET_ASM_FILE_START pa_hpux64_hpas_file_start
 269
 270 #undef TEXT_SECTION_ASM_OP
 271 #define TEXT_SECTION_ASM_OP             "\t.SUBSPA $CODE$\n"
 272 #undef READONLY_DATA_SECTION_ASM_OP
 273 #define READONLY_DATA_SECTION_ASM_OP    "\t.SUBSPA $LIT$\n"
 274 #undef DATA_SECTION_ASM_OP
 275 #define DATA_SECTION_ASM_OP             "\t.SUBSPA $DATA$\n"
 276 #undef BSS_SECTION_ASM_OP
 277 #define BSS_SECTION_ASM_OP              "\t.SUBSPA $BSS$\n"
 278
 279 /* We provide explicit defines for CTORS_SECTION_ASM_OP and
 280    DTORS_SECTION_ASM_OP since we don't yet have support for
 281    named sections with the HP assembler.  */
 282 #undef CTORS_SECTION_ASM_OP
 283 #define CTORS_SECTION_ASM_OP "\t.SUBSPA \\.ctors,QUAD=1,ALIGN=8,ACCESS=31"
 284 #undef DTORS_SECTION_ASM_OP
 285 #define DTORS_SECTION_ASM_OP "\t.SUBSPA \\.dtors,QUAD=1,ALIGN=8,ACCESS=31"
 286
 287 #define HP_INIT_ARRAY_SECTION_ASM_OP \
 288   "\t.SUBSPA \\.init,QUAD=1,ALIGN=8,ACCESS=31"
 289 #define GNU_INIT_ARRAY_SECTION_ASM_OP \
 290   "\t.SUBSPA \\.init_array,QUAD=1,ALIGN=8,ACCESS=31"
 291 #define HP_FINI_ARRAY_SECTION_ASM_OP \
 292   "\t.SUBSPA \\.fini,QUAD=1,ALIGN=8,ACCESS=31"
 293 #define GNU_FINI_ARRAY_SECTION_ASM_OP \
 294   "\t.SUBSPA \\.fini_array,QUAD=1,ALIGN=8,ACCESS=31"
 295
 296 #endif /* USING_ELFOS_H */
 297
 298 /* The following defines, used to run constructors and destructors with
 299    the SOM linker under HP-UX 11, are not needed.  */
 300 #undef HAS_INIT_SECTION
 301 #undef LD_INIT_SWITCH
 302 #undef LD_FINI_SWITCH
 303
 304 /* The following STARTFILE_SPEC and ENDFILE_SPEC defines provide the
 305    magic needed to run initializers and finalizers.  */
 306 #undef STARTFILE_SPEC
 307 #if TARGET_HPUX_11_11
 308 #define STARTFILE_SPEC \
 309   "%{!shared: %{!symbolic: crt0%O%s} %{munix=95:unix95.o%s} \
 310      %{!munix=93:%{!munix=95:unix98%O%s}}} %{static:crtbeginT%O%s} \
 311    %{!static:%{!shared:crtbegin%O%s} %{shared:crtbeginS%O%s}}"
 312 #else
 313 #define STARTFILE_SPEC \
 314   "%{!shared: %{!symbolic: crt0%O%s} %{munix=95:unix95%O%s}} \
 315    %{static:crtbeginT%O%s} %{!static:%{!shared:crtbegin%O%s} \
 316    %{shared:crtbeginS%O%s}}"
 317 #endif
 318 #undef ENDFILE_SPEC
 319 #define ENDFILE_SPEC "%{!shared:crtend%O%s} %{shared:crtendS%O%s}"
 320
 321 /* Since HP uses the .init and .fini sections for array initializers
 322    and finalizers, we need different defines for INIT_SECTION_ASM_OP
 323    and FINI_SECTION_ASM_OP.  With the implementation adopted below,
 324    the sections are not actually used.  However, we still must provide
 325    defines to select the proper code path.  */
 326 #undef INIT_SECTION_ASM_OP
 327 #define INIT_SECTION_ASM_OP
 328 #undef FINI_SECTION_ASM_OP
 329 #define FINI_SECTION_ASM_OP
 330
 331 /* We are using array initializers and don't want calls in the INIT
 332    and FINI sections.  */
 333 #undef CRT_CALL_STATIC_FUNCTION
 334 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC)
 335
 336 /* The init_priority attribute is not supported with HP ld.  This could be
 337    supported if collect2 was used with LD_INIT_SWITCH.  Unfortunately, this
 338    approach doesn't work with GNU ld since HP-UX doesn't support DT_INIT,
 339    and therefore the -init and -fini GNU ld switches.  */
 340 #undef SUPPORTS_INIT_PRIORITY
 341 #define SUPPORTS_INIT_PRIORITY (TARGET_GNU_LD ? 1 : 0)
 342
 343 /* We use DTOR_LIST_BEGIN to carry a bunch of hacks to allow us to use
 344    the init and fini array sections with both the HP and GNU linkers.
 345    The linkers setup the required dynamic entries in the dynamic segment
 346    and the dynamic linker does the calls.  This approach avoids using
 347    collect2.
 348
 349    The first hack is to implement __do_global_ctors_aux in crtbegin as
 350    it needs to be the first entry in the init array so that it is called
 351    last.  HP got the order of the init array backwards.  The DT_INIT_ARRAY
 352    is supposed to be executed in the same order as the addresses appear in
 353    the array.  DT_FINI_ARRAY is supposed to be executed in the opposite
 354    order.
 355
 356    The second hack is a set of plabels to implement the effect of
 357    CRT_CALL_STATIC_FUNCTION.  HP-UX 11 only supports DI_INIT_ARRAY and
 358    DT_FINI_ARRAY and they put the arrays in .init and .fini, rather than
 359    in .init_array and .fini_array.  The standard defines for .init and
 360    .fini have the execute flag set.  So, the assembler has to be hacked
 361    to munge the standard flags for these sections to make them agree
 362    with what the HP linker expects.  With the GNU linker, we need to
 363    used the .init_array and .fini_array sections.  So, we set up for
 364    both just in case.  Once we have built the table, the linker does
 365    the rest of the work.
 366
 367    The order is significant.  Placing __do_global_ctors_aux first in
 368    the list, results in it being called last.  User specified initializers,
 369    either using the linker +init command or a plabel, run before the
 370    initializers specified here.  */
 371
 372 /* We need to add frame_dummy to the initializer list if EH_FRAME_SECTION_NAME
 373    or JCR_SECTION_NAME is defined.  */
 374 #if defined(EH_FRAME_SECTION_NAME) || defined(JCR_SECTION_NAME)
 375 #define PA_INIT_FRAME_DUMMY_ASM_OP ".dword P%frame_dummy"
 376 #else
 377 #define PA_INIT_FRAME_DUMMY_ASM_OP ""
 378 #endif
 379
 380 /* The following hack sets up the .init, .init_array, .fini and
 381    .fini_array sections.  */
 382 #define PA_CRTBEGIN_HACK \
 383 asm (TEXT_SECTION_ASM_OP);                                              \
 384 static void __attribute__((used))                                       \
 385 __do_global_ctors_aux (void)                                            \
 386 {                                                                       \
 387   func_ptr *p = __CTOR_LIST__;                                          \
 388   while (*(p + 1))                                                      \
 389     p++;                                                                \
 390   for (; *p != (func_ptr) -1; p--)                                      \
 391     (*p) ();                                                            \
 392 }                                                                       \
 393                                                                         \
 394 asm (HP_INIT_ARRAY_SECTION_ASM_OP);                                     \
 395 asm (".align 8");                                                       \
 396 asm (".dword P%__do_global_ctors_aux");                                 \
 397 asm (PA_INIT_FRAME_DUMMY_ASM_OP);                                       \
 398 asm (GNU_INIT_ARRAY_SECTION_ASM_OP);                                    \
 399 asm (".align 8");                                                       \
 400 asm (".dword P%__do_global_ctors_aux");                                 \
 401 asm (PA_INIT_FRAME_DUMMY_ASM_OP);                                       \
 402 asm (HP_FINI_ARRAY_SECTION_ASM_OP);                                     \
 403 asm (".align 8");                                                       \
 404 asm (".dword P%__do_global_dtors_aux");                                 \
 405 asm (GNU_FINI_ARRAY_SECTION_ASM_OP);                                    \
 406 asm (".align 8");                                                       \
 407 asm (".dword P%__do_global_dtors_aux")
 408
 409 /* The following two variants of DTOR_LIST_BEGIN are identical to those
 410    in crtstuff.c except for the addition of the above crtbegin hack.  */
 411 #ifdef DTORS_SECTION_ASM_OP
 412 #define DTOR_LIST_BEGIN \
 413 asm (DTORS_SECTION_ASM_OP);                                             \
 414 STATIC func_ptr __DTOR_LIST__[1]                                        \
 415   __attribute__ ((aligned(sizeof(func_ptr))))                           \
 416   = { (func_ptr) (-1) };                                                \
 417 PA_CRTBEGIN_HACK
 418 #else
 419 #define DTOR_LIST_BEGIN \
 420 STATIC func_ptr __DTOR_LIST__[1]                                        \
 421   __attribute__ ((section(".dtors"), aligned(sizeof(func_ptr))))        \
 422   = { (func_ptr) (-1) };                                                \
 423 PA_CRTBEGIN_HACK
 424 #endif
 425
 426 /* If using HP ld do not call pxdb.  Use size as a program that does nothing
 427    and returns 0.  /bin/true cannot be used because it is a script without
 428    an interpreter.  */
 429 #define INIT_ENVIRONMENT "LD_PXDB=/usr/ccs/bin/size"
 430
 431 /* The HPUX dynamic linker objects to undefined weak symbols, so do
 432    not use them in gthr-posix.h.  */
 433 #define GTHREAD_USE_WEAK 0
 434
 435 /* We don't want undefined weak references to __register_frame_info,
 436    __deregister_frame_info, _Jv_RegisterClasses and __cxa_finalize
 437    introduced by crtbegin.o.  The GNU linker only resolves weak
 438    references if they appear in a shared library.  Thus, it would be
 439    impossible to create a static executable if the symbols were weak.
 440    So, the best solution seems to be to make the symbols strong and
 441    provide an archive library of empty stub functions.  */
 442 #define TARGET_ATTRIBUTE_WEAK