ld/NEWS

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