-*- text -*-
+
+Changes in 2.30:
+
+* Add -z separate-code to generate separate code PT_LOAD segment.
+
+* Add "-z undefs" command line option as the inverse of the "-z defs" option.
+
+* Add -z globalaudit command line option to force audit libraries to be run
+ for every dynamic object loaded by an executable - provided that the loader
+ supports this functionality.
+
+* Tighten linker script grammar around file name specifiers to prevent the use
+ of SORT_BY_ALIGNMENT and SORT_BY_INIT_PRIORITY on filenames. These would
+ previously be accepted but had no effect.
+
+* The EXCLUDE_FILE directive can now be placed within any SORT_* directive
+ within input section lists.
+
+Changes in 2.29:
+
+* Support for -z shstk in the x86 ELF linker to generate
+ GNU_PROPERTY_X86_FEATURE_1_SHSTK in ELF GNU program properties.
+
+* Add support for GNU_PROPERTY_X86_FEATURE_1_SHSTK in ELF GNU program
+ properties in the x86 ELF linker.
+
+* Add support for GNU_PROPERTY_X86_FEATURE_1_IBT in ELF GNU program
+ properties in the x86 ELF linker.
+
+* Support for -z ibtplt in the x86 ELF linker to generate IBT-enabled
+ PLT.
+
+* Support for -z ibt in the x86 ELF linker to generate IBT-enabled
+ PLT as well as GNU_PROPERTY_X86_FEATURE_1_IBT in ELF GNU program
+ properties.
+
+* Add support for ELF SHF_GNU_MBIND and PT_GNU_MBIND_XXX.
+
+* Add support for ELF GNU program properties.
+
+* Add support for the Texas Instruments PRU processor.
+
+* When configuring for arc*-*-linux* targets the default linker emulation will
+ change if --with-cpu=nps400 is used at configure time.
+
+* Improve assignment of LMAs to orphan sections in some edge cases where a
+ mixture of both AT>LMA_REGION and AT(LMA) are used.
+
+* Orphan sections placed after an empty section that has an AT(LMA) will now
+ take an load memory address starting from LMA.
+
+* Section groups can now be resolved (the group deleted and the group members
+ placed like normal sections) at partial link time either using the new linker
+ option --force-group-allocation or by placing FORCE_GROUP_ALLOCATION into the
+ linker script.
+
+Changes in 2.28:
+
+* The EXCLUDE_FILE linker script construct can now be applied outside of the
+ section list in order for the exclusions to apply over all input sections in
+ the list.
+
+* Add support for the RISC-V architecture.
+
+* The command line option --no-eh-frame-hdr can now be used in ELF based
+ linkers to disable the automatic generation of .eh_frame_hdr sections.
+
+* Add --in-implib=<infile> to the ARM linker to enable specifying a set of
+ Secure Gateway veneers that must exist in the output import library specified
+ by --out-implib=<outfile> and the address they must have. As such,
+ --in-implib is only supported in combination with --cmse-implib.
+
+* Extended the --out-implib=<file> option, previously restricted to x86 PE
+ targets, to any ELF based target. This allows the generation of an import
+ library for an ELF executable, which can then be used by another application
+ to link against the executable.
+
+Changes in 2.27:
+
+* Add a configure option --enable-relro to decide whether -z relro should
+ be enabled in ELF linker by default. Default to yes for all Linux
+ targets except FRV, HPPA, IA64 and MIPS. Note that -z relro can increase
+ disk and memory size.
+
+* Support for -z noreloc-overflow in the x86-64 ELF linker to disable
+ relocation overflow check.
+
+* Add -z common/-z nocommon options for ELF targets to control whether to
+ convert common symbols to the STT_COMMON type during a relocatable link.
+
+* Support for -z nodynamic-undefined-weak in the x86 ELF linker, which
+ avoids dynamic relocations against undefined weak symbols in executable.
+
+* The NOCROSSREFSTO command was added to the linker script language.
+
+* Add --no-apply-dynamic-relocs to the AArch64 linker to do not apply link-time
+ values for dynamic relocations.
+
+Changes in 2.26:
+
+* Add --fix-stm32l4xx-629360 to the ARM linker to enable a link-time
+ workaround for a bug in the bus matrix / memory controller for some of
+ the STM32 Cortex-M4 based products (STM32L4xx)
+
+* Add a configure option --enable-compressed-debug-sections={all,ld} to
+ decide whether DWARF debug sections should be compressed by default.
+
+* Add support for the ARC EM/HS, and ARC600/700 architectures.
+
+* Experimental support for linker garbage collection (--gc-sections)
+ has been enabled for COFF and PE based targets.
+
+* New command line option for ELF targets to compress DWARF debug
+ sections, --compress-debug-sections=[none|zlib|zlib-gnu|zlib-gabi].
+
+* New command line option, --orphan-handling=[place|warn|error|discard], to
+ adjust how orphan sections are handled. The default is 'place' which gives
+ the current behaviour, 'warn' and 'error' issue a warning or error
+ respectively when orphan sections are found, and 'discard' will discard all
+ orphan sections.
+
+* Add support for LLVM plugin.
+
+* Add --print-memory-usage option to report memory blocks usage.
+
+* Add --require-defined option, it's like --undefined except the new symbol
+ must be defined by the end of the link.
+
+Changes in 2.25:
+
+* PE binaries now once again contain real timestamps by default. To disable
+ the inclusion of a timestamp in a PE binary, use the --no-insert-timestamp
+ command line option.
+
+* Replace support for openrisc and or32 with support for or1k.
+
+* Add support for the --build-id command line option to COFF based targets.
+
+* x86/x86_64 pe-coff now supports the --build-id option.
+
+* Add support for the Andes NDS32.
+
+Changes in 2.24:
+
+* Add LOG2CEIL() builtin function to the linker script language
+
+* Add support for the Texas Instruments MSP430X processor.
+
+* Add support for Altera Nios II.
+
+* Add support for the V850E3V5 architecture.
+
+* Add support for the Imagination Technologies Meta processor.
+
+* --enable-new-dtags no longer generates old dtags in addition to new dtags.
+
+* Remove linker support for MIPS ECOFF targets.
+
+* Add ALIGN_WITH_INPUT to the linker script language to force the alignment of
+ an output section to use the maximum alignment of all its input sections.
+
+Changes in 2.23:
+
+* Enable compressed debug section feature for x86/x86_64 pe-coff.
+
+* Add support for the 64-bit ARM architecture: AArch64.
+
+* Added SORT_NONE to the linker script language to disable section sorting.
+
+* Add a linker-provided symbol when producing ELF output, '__ehdr_start'
+ to point to the ELF file header (and nearby program headers) in the
+ program's memory image.
+
+* Add support for S12X processor.
+
+* Add support for the VLE extension to the PowerPC architecture.
+
+* Add support for the Freescale XGATE architecture.
+
+* Add option -f FILE on AIX (for response file).
+
+* Add support for the Renesas RL78 architecture.
+
+* Add support for the Adapteva EPIPHANY architecture.
+
+Changes in 2.22:
+
+* --copy-dt-needed-entries is no longer enabled by default. Instead
+ --no-copy-dt-needed-entries is the default.
+
+* INPUT_SECTION_FLAGS has been added to the linker script language
+ to allow selection of input sections by section header section flags.
+
+* Add support for the Tilera TILEPro and TILE-Gx architectures.
+
+* Added SORT_BY_INIT_PRIORITY to the linker script language to permit
+ sorting sections by numerical value of the GCC init_priority attribute
+ encoded in the section name.
+
+Changes in 2.21:
+
+* Linker script expression evaluation is somewhat more sane. This may
+ break scripts that depend on quirks of the old expression evaluation.
+
+* Turn off underscoring for x86_64 PE+-COFF targets. For old behavior the
+ option --enable-leading-mingw64-underscores can be used on configure of
+ bfd.
+
+* Add support for the TMS320C6000 (TI C6X) processor family.
+
+* --add-needed renamed to --copy-dt-needed-entries in order to avoid confusion
+ with --as-needed option.
+
+* Extend .def file syntax by '== <ID>' for imports and exports. This allows
+ to alias the import/export table name written in PE image.
+
+* Add --exclude-all-symbols option to PE based linkers. This prevents all
+ symbols from automatically being exported.
+
+* Add support for the Renesas RX processor.
+
+* Add support for alpha-vms target.
+
+Changes in 2.20:
+
+* GNU/Linux targets now support the STB_GNU_UNIQUE symbol binding. This is a
+ GNU extension to the standard set of ELF symbol bindings. The binding will
+ be passed on to the dynamic linker which will make sure that in the entire
+ process there is just one symbol with the given name and type in use.
+
+* PE targets now support a GNU extension to allow the alignment of common
+ common symbols to be specified. This support uses custom options in
+ the .drectve section, which will be disregarded by the native tools.
+
+* PE targets now add primitive support for ELF version scripts; symbols
+ are not versioned, but the local and global symbol visibility directives
+ are respected when filtering symbols in auto-export mode.
+
+* New option --no-export-dynamic to undo the effect of the -E and
+ --export-dynamic options.
+
+* ELF: --warn-alternate-em option to warn if an object has alternate
+ ELF machine code.
+
+* New script function REGION_ALIAS to add alias names to memory regions.
+
+* PE targets no longer make use of the long section names PE extension to
+ the COFF format when generating executable images, by default. The old
+ (slightly non-conformant) behaviour can still be invoked by using the
+ new '--enable-long-section-names' command-line option. It is also enabled
+ automatically in the presence of un-stripped debug information, as GDB
+ needs to be able to find the debug info sections by their full names.
+
+* For GNU/Linux systems the linker will now avoid processing any relocations
+ made against symbols of the STT_GNU_IFUNC type and instead emit them into
+ the resulting binary for processing by the loader.
+
+* --as-needed now links in a dynamic library if it satisfies undefined
+ symbols in regular objects, or in other dynamic libraries. In the
+ latter case the library is not linked if it is found in a DT_NEEDED
+ entry of one of the libraries already linked.
+
+* Add a new command line option, -Ttext-segment ADDR, for ELF targets
+ to set the address of the first byte of the text segment.
+
+* Add support for Sunplus score architecture.
+
+* Add new option --use-nul-prefixed-import-tables to ld for PE targets to
+ allow fallback to old import table generation with null element prefix.
+
+* Windows PE systems now support a new --exclude-modules-for-implib option,
+ allowing users to partition object files and archive members between a DLL
+ and its associated import library as they are generated during linking.
+
+* Add support for Lattice Mico32 (lm32) architecture.
+
+* Add CR16 ELF --embedded-relocs (used to embedded relocations into binaries
+ for Embedded-PIC code) option.
+
+* Add to the PE/PE+ targets the support of two different kinds of
+ pseudo-relocations. They can be selected by the switches
+ --enable-runtime-pseudo-reloc-v1 and --enable-runtime-pseudo-reloc-v2.
+ For the switch --enable-runtime-pseudo-reloc it uses for 32-bit
+ runtime pseudo relocation version one, for 64-bit the version two.
+
+Changes in 2.19:
+
+* Linker scripts support a new INSERT command that makes it easier to
+ augment the default script.
+
+* Linker script input section filespecs may now specify a file within an
+ archive by writing "archive:file".
+
+* The --sort-common switch now has an optional argument which specifies the
+ direction of sorting.
+
+* The M68K linker now supports multiple GOT generation schemes controlled via
+ the --got=<type> command line option.
+
+* The ARM EABI linker will now generate stubs for function calls to symbols
+ that are too far away. The placement of the stubs is controlled by a new
+ linker command line option: --stub-group-size=N.
+
Changes in 2.18:
* Linker sources now released under version 3 of the GNU General Public
__start_SECNAME and __stop_SECNAME, where SECNAME is the section name, at the
beginning and the end of the section. This is used by glibc.
+ Addendum: Current versions of the linker (at least for version 2.18 onwards
+and possibly much earlier as well) place two restrictions on this feature: The
+symbols are only implemented for orphaned sections, not for explicitly placed
+sections and they are PROVIDEd rather than being defined.
+
* When an ELF section named .gnu.warning is encountered in an input file, the
contents of the section are displayed as an error message, and the section is
not copied into the output file. This is used by glibc.
other utilities should work on Risc/Ultrix and Irix.
\f
+Copyright (C) 2012-2018 Free Software Foundation, Inc.
+
+Copying and distribution of this file, with or without modification,
+are permitted in any medium without royalty provided the copyright
+notice and this notice are preserved.
+
Local variables:
fill-column: 79
End:
projects / deliverable / binutils-gdb.git / blobdiff