ld/NEWS

   1 -*- text -*-
   2
   3 Changes in 2.28:
   4
   5 * The command line option --no-eh-frame-hdr can now be used in ELF based
   6   linkers to disable the automatic generation of .eh_frame_hdr sections.
   7
   8 * Add --in-implib=<infile> to the ARM linker to enable specifying a set of
   9   Secure Gateway veneers that must exist in the output import library specified
  10   by --out-implib=<outfile> and the address they must have.  As such,
  11   --in-implib is only supported in combination with --cmse-implib.
  12
  13 * Extended the --out-implib=<file> option, previously restricted to x86 PE
  14   targets, to any ELF based target.  This allows the generation of an import
  15   library for an ELF executable, which can then be used by another application
  16   to link against the executable.
  17
  18 Changes in 2.27:
  19
  20 * Add a configure option --enable-relro to decide whether -z relro should
  21   be enabled in ELF linker by default.  Default to yes for all Linux
  22   targets except FRV, HPPA, IA64 and MIPS.
  23
  24 * Support for -z noreloc-overflow in the x86-64 ELF linker to disable
  25   relocation overflow check.
  26
  27 * Add -z common/-z nocommon options for ELF targets to control whether to
  28   convert common symbols to the STT_COMMON type during a relocatable link.
  29
  30 * Support for -z nodynamic-undefined-weak in the x86 ELF linker, which
  31   avoids dynamic relocations against undefined weak symbols in executable.
  32
  33 * The NOCROSSREFSTO command was added to the linker script language.
  34
  35 * Add --no-apply-dynamic-relocs to the AArch64 linker to do not apply link-time
  36   values for dynamic relocations.
  37
  38 Changes in 2.26:
  39
  40 * Add --fix-stm32l4xx-629360 to the ARM linker to enable a link-time
  41   workaround for a bug in the bus matrix / memory controller for some of
  42   the STM32 Cortex-M4 based products (STM32L4xx)
  43
  44 * Add a configure option --enable-compressed-debug-sections={all,ld} to
  45   decide whether DWARF debug sections should be compressed by default.
  46
  47 * Add support for the ARC EM/HS, and ARC600/700 architectures.
  48
  49 * Experimental support for linker garbage collection (--gc-sections)
  50   has been enabled for COFF and PE based targets.
  51
  52 * New command line option for ELF targets to compress DWARF debug
  53   sections, --compress-debug-sections=[none|zlib|zlib-gnu|zlib-gabi].
  54
  55 * New command line option, --orphan-handling=[place|warn|error|discard], to
  56   adjust how orphan sections are handled.  The default is 'place' which gives
  57   the current behaviour, 'warn' and 'error' issue a warning or error
  58   respectively when orphan sections are found, and 'discard' will discard all
  59   orphan sections.
  60
  61 * Add support for LLVM plugin.
  62
  63 * Add --print-memory-usage option to report memory blocks usage.
  64
  65 * Add --require-defined option, it's like --undefined except the new symbol
  66   must be defined by the end of the link.
  67
  68 Changes in 2.25:
  69
  70 * PE binaries now once again contain real timestamps by default.  To disable
  71   the inclusion of a timestamp in a PE binary, use the --no-insert-timestamp
  72   command line option.
  73
  74 * Replace support for openrisc and or32 with support for or1k.
  75
  76 * Add support for the --build-id command line option to COFF based targets.
  77
  78 * x86/x86_64 pe-coff now supports the --build-id option.
  79
  80 * Add support for the Andes NDS32.
  81
  82 Changes in 2.24:
  83
  84 * Add LOG2CEIL() builtin function to the linker script language
  85
  86 * Add support for the Texas Instruments MSP430X processor.
  87
  88 * Add support for Altera Nios II.
  89
  90 * Add support for the V850E3V5 architecture.
  91
  92 * Add support for the Imagination Technologies Meta processor.
  93
  94 * --enable-new-dtags no longer generates old dtags in addition to new dtags.
  95
  96 * Remove linker support for MIPS ECOFF targets.
  97
  98 * Add ALIGN_WITH_INPUT to the linker script language to force the alignment of
  99   an output section to use the maximum alignment of all its input sections.
 100
 101 Changes in 2.23:
 102
 103 * Enable compressed debug section feature for x86/x86_64 pe-coff.
 104
 105 * Add support for the 64-bit ARM architecture: AArch64.
 106
 107 * Added SORT_NONE to the linker script language to disable section sorting.
 108
 109 * Add a linker-provided symbol when producing ELF output, '__ehdr_start'
 110   to point to the ELF file header (and nearby program headers) in the
 111   program's memory image.
 112
 113 * Add support for S12X processor.
 114
 115 * Add support for the VLE extension to the PowerPC architecture.
 116
 117 * Add support for the Freescale XGATE architecture.
 118
 119 * Add option -f FILE on AIX (for response file).
 120
 121 * Add support for the Renesas RL78 architecture.
 122
 123 * Add support for the Adapteva EPIPHANY architecture.
 124
 125 Changes in 2.22:
 126
 127 * --copy-dt-needed-entries is no longer enabled by default.  Instead
 128   --no-copy-dt-needed-entries is the default.
 129
 130 * INPUT_SECTION_FLAGS has been added to the linker script language
 131   to allow selection of input sections by section header section flags.
 132
 133 * Add support for the Tilera TILEPro and TILE-Gx architectures.
 134
 135 * Added SORT_BY_INIT_PRIORITY to the linker script language to permit
 136   sorting sections by numerical value of the GCC init_priority attribute
 137   encoded in the section name.
 138
 139 Changes in 2.21:
 140
 141 * Linker script expression evaluation is somewhat more sane.  This may
 142   break scripts that depend on quirks of the old expression evaluation.
 143
 144 * Turn off underscoring for x86_64 PE+-COFF targets.  For old behavior the
 145   option --enable-leading-mingw64-underscores can be used on configure of
 146   bfd.
 147
 148 * Add support for the TMS320C6000 (TI C6X) processor family.
 149
 150 * --add-needed renamed to --copy-dt-needed-entries in order to avoid confusion
 151   with --as-needed option.
 152
 153 * Extend .def file syntax by '== <ID>' for imports and exports. This allows
 154   to alias the import/export table name written in PE image.
 155
 156 * Add --exclude-all-symbols option to PE based linkers.  This prevents all
 157   symbols from automatically being exported.
 158
 159 * Add support for the Renesas RX processor.
 160
 161 * Add support for alpha-vms target.
 162
 163 Changes in 2.20:
 164
 165 * GNU/Linux targets now support the STB_GNU_UNIQUE symbol binding.  This is a
 166   GNU extension to the standard set of ELF symbol bindings.  The binding will
 167   be passed on to the dynamic linker which will make sure that in the entire
 168   process there is just one symbol with the given name and type in use.
 169
 170 * PE targets now support a GNU extension to allow the alignment of common
 171   common symbols to be specified.  This support uses custom options in
 172   the .drectve section, which will be disregarded by the native tools.
 173
 174 * PE targets now add primitive support for ELF version scripts; symbols
 175   are not versioned, but the local and global symbol visibility directives
 176   are respected when filtering symbols in auto-export mode.
 177
 178 * New option --no-export-dynamic to undo the effect of the -E and
 179   --export-dynamic options.
 180
 181 * ELF: --warn-alternate-em option to warn if an object has alternate
 182   ELF machine code.
 183
 184 * New script function REGION_ALIAS to add alias names to memory regions.
 185
 186 * PE targets no longer make use of the long section names PE extension to
 187   the COFF format when generating executable images, by default.  The old
 188   (slightly non-conformant) behaviour can still be invoked by using the
 189   new '--enable-long-section-names' command-line option.  It is also enabled
 190   automatically in the presence of un-stripped debug information, as GDB
 191   needs to be able to find the debug info sections by their full names.
 192
 193 * For GNU/Linux systems the linker will now avoid processing any relocations
 194   made against symbols of the STT_GNU_IFUNC type and instead emit them into
 195   the resulting binary for processing by the loader.
 196
 197 * --as-needed now links in a dynamic library if it satisfies undefined
 198   symbols in regular objects, or in other dynamic libraries.  In the
 199   latter case the library is not linked if it is found in a DT_NEEDED
 200   entry of one of the libraries already linked.
 201
 202 * Add a new command line option, -Ttext-segment ADDR, for ELF targets
 203   to set the address of the first byte of the text segment.
 204
 205 * Add support for Sunplus score architecture.
 206
 207 * Add new option --use-nul-prefixed-import-tables to ld for PE targets to
 208   allow fallback to old import table generation with null element prefix.
 209
 210 * Windows PE systems now support a new --exclude-modules-for-implib option,
 211   allowing users to partition object files and archive members between a DLL
 212   and its associated import library as they are generated during linking.
 213
 214 * Add support for Lattice Mico32 (lm32) architecture.
 215
 216 * Add CR16 ELF --embedded-relocs (used to embedded relocations into binaries
 217   for Embedded-PIC code) option.
 218
 219 * Add to the PE/PE+ targets the support of two different kinds of
 220   pseudo-relocations.  They can be selected by the switches
 221   --enable-runtime-pseudo-reloc-v1 and --enable-runtime-pseudo-reloc-v2.
 222   For the switch --enable-runtime-pseudo-reloc it uses for 32-bit
 223   runtime pseudo relocation version one, for 64-bit the version two.
 224
 225 Changes in 2.19:
 226
 227 * Linker scripts support a new INSERT command that makes it easier to
 228   augment the default script.
 229
 230 * Linker script input section filespecs may now specify a file within an
 231   archive by writing "archive:file".
 232
 233 * The --sort-common switch now has an optional argument which specifies the
 234   direction of sorting.
 235
 236 * The M68K linker now supports multiple GOT generation schemes controlled via
 237   the --got=<type> command line option.
 238
 239 * The ARM EABI linker will now generate stubs for function calls to symbols
 240   that are too far away.  The placement of the stubs is controlled by a new
 241   linker command line option: --stub-group-size=N.
 242
 243 Changes in 2.18:
 244
 245 * Linker sources now released under version 3 of the GNU General Public
 246   License.
 247
 248 * ELF: New --build-id option to generate a unique per-binary identifier
 249   embedded in a note section.
 250
 251 * Added support for National Semicondutor CompactRISC (ie CR16) target.
 252
 253 * -l:foo now searches the library path for a filename called foo,
 254   without converting it to libfoo.a or libfoo.so.
 255
 256 * Add a new command line option '--default-script=FILE' or '-dT FILE'
 257   which specifies a replacement for the built in, default linker
 258   script.
 259
 260 * ELF: Add -Bsymbolic-functions, --dynamic-list-cpp-new, which puts C++
 261   operator new and delete on the dynamic list, and --dynamic-list-data,
 262   builtin list for --dynamic-list, which puts global data symbols on the
 263   dynamic list.
 264
 265 * Add support for x86_64 PE+ target.
 266
 267 * Add support for Score target.
 268
 269 * ELF: Add --dynamic-list option to specify a list of global symbols
 270   whose references shouldn't be bound to the definition within the
 271   shared library, or a list of symbols which should be added to the
 272   symbol table in the executable.
 273
 274 * The default output section LMA has changed for allocatable sections from
 275   being equal to VMA, to keeping the difference between LMA and VMA the same as
 276   the previous output section in the same region.  This is a more useful
 277   default when using overlays and other cases where you specify an LMA
 278   differing from the VMA for some sections.
 279
 280 * New switch: --print-gc-sections to list any sections removed by garabge
 281   collection.
 282
 283 * ARM: Added --vfp11-denorm-fix option to work around an erratum in current
 284   VFP11 coprocessors.
 285
 286 Changes in 2.17:
 287
 288 * Support for the Infineon XC16X has been added by KPIT Cummins Infosystems.
 289
 290 * Modify the Linux linker search order to better match ld.so search order.
 291   Look for DT_NEEDED libraries in paths specified by ld.so.conf before
 292   searching the default directories, rather than vice versa.
 293   Use $prefix/etc/ld.so.conf if it exists, otherwise /etc/ld.so.conf.
 294
 295 * PE-COFF: Forward exports from DLL's can now be specified in .def files
 296   passed directly to ld.
 297
 298 * Support for the Z80 processor family has been added.
 299
 300 * Add support for the "@<file>" syntax to the command line, so that extra
 301   switches can be read from <file>.
 302
 303 Changes in 2.16:
 304
 305 * Support for the R_ARM_V4BX relocation as defined in the ARM AAELF
 306   specification has been added via the --fix-v4bx command-line option.
 307
 308 * New linker script construct AS_NEEDED(), which sets the --as-needed flag
 309   for input files listed inside of it.
 310
 311 * A new command-line option, --sysroot, can be used to override the
 312   default sysroot location.  It only applies to toolchains that were
 313   configured using --with-sysroot.
 314
 315 * New linker script functions: ORIGIN() and LENGTH() which return information
 316   about a specified memory region.
 317
 318 * Port to MAXQ processor contributed by HCL Tech.
 319
 320 * Added SEGMENT_START to the linker script language to permit the user to
 321   override the base address for a segment from the command-line.
 322
 323 * ELF: --warn-shared-textrel option to warn if adding a DT_TEXTREL to a shared
 324   object.
 325
 326 * Added SORT_BY_NAME and SORT_BY_ALIGNMENT to the linker script
 327   language to permit sorting sections by section name or section
 328   maximum alignment.
 329
 330 * Added a new linker command line switch, --sort-section name|alignment,
 331   to sort sections by section name or maximum alignment.
 332
 333 * ELF: --add-needed/--no-add-needed options to control if a DT_NEEDED tag
 334   should be added when a shared library comes from DT_NEEDED tags.
 335
 336 * Support for the crx-elf target added.
 337
 338 * Support for the sh-symbianelf target added.
 339
 340 * A new linker command line switch has been added which allows the hash table
 341   size to be set to a suitable prime value near to its argument.  This switch
 342   is --hash-size=<NUMBER>.  Also if the switch --reduce-memory-overheads is
 343   used, and --hash-size has not been used, then the default value will be set
 344   to 1021.
 345
 346 * Linker map files are now generated with an O(N) algorithm for finding symbols
 347   that are defined in each section.  This uses about 40% more memory for
 348   symbols than the old O(N^2) algorithm.  You can use the new
 349   --reduce-memory-overheads option to select the old algorithm; this option
 350   might also be used in the future to select similar tradeoffs.
 351
 352 Changes in 2.15:
 353
 354 * ELF: --as-needed/--no-as-needed options to control if a DT_NEEDED tag should
 355   be added only when a shared library is referenced.
 356
 357 * PE: --large-address-aware option to indicate executables support virtual
 358   addresses greater than 2 gigabytes.
 359
 360 * DWARF 2 support for i386pe added.
 361
 362 * The linker script operator DEFINED() will now yield 1 only for a symbol that
 363   is defined before the statement where DEFINED is used.
 364
 365 * The MIPS --embedded-relocs (used to embed relocations into binaries for
 366   Embedded-PIC code) is deprecated and will be removed in a future release.
 367
 368 * cr16c support added by NSC.
 369
 370 * m32r Linux (ELF) support added by Renesas.
 371
 372 * Improved linker's handling of unresolved symbols.  The switch
 373   --unresolved-symbols=<method> has been added to tell the linker when it
 374   should report them and the switch --warn-unresolved-symbols has been added to
 375   make reports be issued as warning messages rather than errors.
 376
 377 Changes in 2.14:
 378
 379 * Added support for Xtensa architecture.
 380
 381 * Added --with-sysroot configure switch to specify a target system root, for
 382   linking against a target filesystem image.
 383
 384 * Added --accept-unknown-linker-format to restore old linker behaviour (pre
 385   2.14) of silently accepting and linking in any files in an unknown binary
 386   file format.
 387
 388 * Added --no-omagic to undo the effects of the -N option.
 389
 390 * Support for Texas Instruments TMS320C4x and TMS320C3x series of
 391   DSP's contributed by Michael Hayes and Svein E. Seldal.
 392
 393 * Added --with-lib-path configure switch to specify default value for
 394   LIB_PATH.
 395
 396 * ARM port to QNX operating system added by Graeme Peterson.
 397
 398 * IP2K support added by Denis Chertykov.
 399
 400 Changes in 2.13:
 401
 402 * Support for the Fujitsu FRV architecture added by Red Hat. Models for FR400
 403   and FR500 included.
 404
 405 Changes in version 2.13:
 406
 407 * DEC VAX ELF support, by Matt Thomas.
 408
 409 Changes in version 2.12:
 410
 411 * Support for Don Knuth's MMIX, by Hans-Peter Nilsson.
 412
 413 * Support for the OpenRISC 32-bit embedded processor by OpenCores.
 414
 415 * Support for -z nocopyreloc in the x86 ELF linker, which disables
 416   production of copy relocs.  Warning: using this option may result in
 417   non-sharable applications.
 418
 419 * Support for -z combreloc in the ELF linker, which puts dynamic
 420   relocations against the same symbol together, so that dynamic linker
 421   can use an one-entry symbol lookup cache.
 422
 423 * Support for ELF SHF_MERGE section merging, by Jakub Jelinek.
 424
 425 Changes in version 2.11:
 426
 427 * Support for AMD x86-64 architecture, by Jan Hubicka, SuSE Labs.
 428
 429 * Support added for eliminating duplicate DWARF2 debug information by
 430   having the compiler generate the information in sections called
 431   .gnu.linkonce.wi.XXXX where XXXX is a checksum for the contents.  The
 432   linker then merges these sections together into the normal .debug_info
 433   section.
 434
 435 * The native ELF linker now searches the directories in DT_RUNPATH or
 436   DT_RPATH of a shared library for shared libraries needed by it.
 437
 438 * TI C54x support, by Timothy Wall.
 439
 440 * Added command line switch --section-start to set the start address of any
 441   specified section.
 442
 443 * Added ability to emit full relocation information in linked executables,
 444   enabled by --emit-relocs.  Some post-linkage optimization tools need
 445   this information in order to be able to correctly identify and perform
 446   symbol relative addressing in the event of changes in section contents
 447   (instructions being added or deleted, extending data sections, etc.)
 448
 449 * Support for i860, by Jason Eckhardt (preliminary, alpha quality).
 450
 451 * Support for CRIS (Axis Communications ETRAX series).
 452
 453 * Support for PDP-11 and 2.11BSD a.out format, by Lars Brinkhoff.
 454
 455 Changes in version 2.10:
 456
 457 * Added AT> to the linker script language to allow load-time allocation of
 458   sections into regions.
 459
 460 * Added garbage collection of unused sections, enabled by --gc-sections.
 461   It does require a bit of backend support; currently implemented are
 462   arm-elf, avr-elf, d10v-elf, fr30-elf, i386-elf, m32r-elf, m68k-elf,
 463   mcore-elf, mips-elf, mn10300-elf, ppc-elf, sh-elf, sparc-elf, and v850-elf.
 464   Others will ignore the option.
 465
 466 * Added SORT to the linker script language to permit sorting sections by file
 467   name or section name.
 468
 469 * Added EXTERN to the linker script language as an equivalent to the -u
 470   command-line option.
 471
 472 * Added ASSERT to the linker script language.
 473
 474 * Added EXCLUDE_FILE to the linker script language for further control over
 475   wildcard file names.
 476
 477 * Added -O option to optimize linker output (as of this writing, this only
 478   affects ELF shared library generation).
 479
 480 * The -e option now accepts a number as well as a symbol name.
 481
 482 * Added --no-undefined option to disallow undefined symbols when creating a
 483   shared library.
 484
 485 * The linker now issues a warning, not an error, for an undefined symbol when
 486   using -Bsymbolic; use the new --no-undefined option to get the old
 487   behaviour.
 488
 489 * Added --demangle and --no-demangle options.
 490
 491 Changes in version 2.9:
 492
 493 * Added SQUAD to the linker script language.
 494
 495 * New option --no-warn-mismatch.
 496
 497 * The MEMORY command now parses the attributes to determine where sections that
 498   are not placed in a specific memory region are placed.
 499
 500 Changes in version 2.8:
 501
 502 * Linker scripts may now contain shell wildcard characters for file and section
 503   names.
 504
 505 * The linker now supports symbol versions in ELF.
 506
 507 * The NOCROSSREFS command was added to the linker script language.
 508
 509 * The LOADADDR expression was added to the linker script language.
 510
 511 * MAX and MIN functions were added to the linker script language.
 512
 513 * The OVERLAY construct was added to the linker script language.
 514
 515 * New option --warn-section-align to warn when the address of an output section
 516   changes due to alignment of an input section.
 517
 518 * New options --filter/-F and --auxiliary/-f.
 519
 520 Changes in version 2.7:
 521
 522 * New option --cref to print out a cross reference table.
 523
 524 * New option --wrap SYMBOL.
 525
 526 * New option --no-whole-archive, to turn off the effect of --whole-archive.
 527
 528 * Input sections assigned to the output section /DISCARD/ in the linker script
 529   are not included in the output file.
 530
 531 * The SunOS and ELF linkers now merge stabs debugging information which uses
 532   the N_BINCL and N_EINCL stab types.  This reduces the amount of debugging
 533   information generated.
 534
 535 Changes in version 2.6:
 536
 537 * When an ELF section name is representable as a C identifier (this is not true
 538 of most ELF section names), the linker will automatically define symbols
 539 __start_SECNAME and __stop_SECNAME, where SECNAME is the section name, at the
 540 beginning and the end of the section.  This is used by glibc.
 541
 542   Addendum: Current versions of the linker (at least for version 2.18 onwards
 543 and possibly much earlier as well) place two restrictions on this feature:  The
 544 symbols are only implemented for orphaned sections, not for explicitly placed
 545 sections and they are PROVIDEd rather than being defined.
 546
 547 * When an ELF section named .gnu.warning is encountered in an input file, the
 548 contents of the section are displayed as an error message, and the section is
 549 not copied into the output file.  This is used by glibc.
 550
 551 * When an ELF section named .gnu.warning.SYMBOL is encountered in an input
 552 file, and the symbol SYMBOL is referenced by some object file, the contents of
 553 the section are displayed as an error message.  The section is not copied into
 554 the output file, unless doing a relocatable or shared link.  This is used by
 555 glibc.
 556
 557 * New options -split-by-reloc and -split-by-file.
 558
 559 * The linker now supports linking PIC compiled code on SPARC SunOS.  It can
 560 also create SPARC SunOS shared libraries, and, like the native SunOS linker,
 561 will do so whenever there is an undefined symbol in the link and neither the -e
 562 nor the -r option was used.
 563
 564 * The -rpath option may be used on SunOS to set the list of directories to be
 565 searched at run time.  This overrides the default of building the list from the
 566 -L options.
 567
 568 * The COFF linker now combines debugging information for structs, unions, and
 569 enums, so that even if the same type is defined in multiple input files it will
 570 only be defined once in the output file.  The --traditional-format switch will
 571 prevent this optimization.
 572
 573 Changes in version 2.5:
 574
 575 * The linker now supports linking against SunOS shared libraries.  It still can
 576 not link SunOS PIC (Position Independent Code) files, so it can not be used to
 577 generate shared libraries.
 578
 579 * The linker now supports linking against ELF shared libraries for the i386
 580 (UnixWare) and SPARC (Solaris).  It can also link ELF PIC files, and can be
 581 used to generate shared libraries.  Shared library generation is not well
 582 tested; please report any problems encountered.  The linker is now enabled for
 583 Solaris again.
 584
 585 * Eric Youngdale has contributed Linux support code, including linking against
 586 Linux a.out shared libraries.  The linker produces Linux QMAGIC binaries.
 587
 588 * The ELF backend has been converted to the new linker code.  To use the new
 589 ELF linker, each particular target requires a relocation function.  So far,
 590 this function has been written for i386 (UnixWare), SPARC (Solaris) MIPS (Irix
 591 5), and HPPA ELF targets.
 592
 593 * The -( (--start-group) and -) (--end-group) options have been added to
 594 support searching a group of archives as though they were a single archive.
 595 This can also be used in a linker script, as GROUP ( files ).
 596
 597 * When a file is named on the command line, and the linker does not recognize
 598 it as an object file, the linker will now treat the file as a linker script
 599 file.  A linker script named in this way augments, but does not replace, the
 600 default linker script.
 601
 602 * The -warn-once option was added.  It causes the linker to only warn once per
 603 undefined symbol, rather than once per reference.
 604
 605 * The COFF backend has been converted to the new linker code.  As with ELF, to
 606 use the new linker, each particular target requires a relocation function.  So
 607 far, this function has been written for the i386, m68k, a29k and SH targets.
 608
 609 * The -V flag was made a synonym for -v, for SVR4 compatibility.  The old -V
 610 behaviour is available via --verbose.
 611
 612 Changes in version 2.4:
 613
 614 * New linker code, by Steve Chamberlain and Ian Taylor.  For a.out and ecoff
 615   formats (so far), this should result in considerable savings in time
 616   and memory used while linking; slightly poorer performance than
 617   before for formats not converted yet.
 618
 619 * Command-line parsing is no longer done with flex.  This means
 620   oddball characters in filenames won't get treated as argument
 621   separators.
 622
 623 * HP-PA ELF support, by Jeff Law.  (No SOM support yet.)
 624
 625 * Mach i386 support, by David Mackenzie.
 626
 627 * Irix 4 shared libraries are now supported (Irix 5 uses ELF, and ELF shared
 628   libraries are not yet supported).
 629
 630 * COFF shared libraries (as on SCO) should work as well.
 631
 632 * The linker is disabled for Solaris.  (Actually, it was in 2.3 also, I just
 633   forgot to note it.)  Some of their C library routines don't work when
 634   statically linked, and the GNU linker doesn't support dynamic linking yet.
 635
 636 Changes in version 2.3:
 637
 638 * Weak symbols are now supported.
 639
 640 * ELF support has been added.  The linker has been bootstrapped on
 641   UnixWare and Solaris.
 642
 643 * Alpha OSF/1 support has been added (non dynamic linking only).
 644
 645 Changes in version 2.2:
 646
 647 * The `bfd' library has been updated to reduce a.out-format string
 648   table size.  The effect of this is that files linked from many input
 649   files with duplicate symbols (`-g' debugging records, or identical
 650   static symbols) should be much smaller.
 651
 652 Changes in version 2.1:
 653
 654 * The ld -ySYMBOL flag (to trace references to SYMBOL) is now implemented.
 655
 656 * There is now support for writing ECOFF files, so ld and the
 657   other utilities should work on Risc/Ultrix and Irix.
 658
 659 \f
 660 Copyright (C) 2012-2016 Free Software Foundation, Inc.
 661
 662 Copying and distribution of this file, with or without modification,
 663 are permitted in any medium without royalty provided the copyright
 664 notice and this notice are preserved.
 665
 666 Local variables:
 667 fill-column: 79
 668 End: