diff options
Diffstat (limited to 'contrib/llvm-project/lld/docs/ReleaseNotes.rst')
| -rw-r--r-- | contrib/llvm-project/lld/docs/ReleaseNotes.rst | 144 |
1 files changed, 143 insertions, 1 deletions
diff --git a/contrib/llvm-project/lld/docs/ReleaseNotes.rst b/contrib/llvm-project/lld/docs/ReleaseNotes.rst index 936d800cabc3..5819d67d3297 100644 --- a/contrib/llvm-project/lld/docs/ReleaseNotes.rst +++ b/contrib/llvm-project/lld/docs/ReleaseNotes.rst @@ -25,18 +25,43 @@ Non-comprehensive list of changes in this release ELF Improvements ---------------- +* ``--package-metadata=`` has been added to create package metadata notes + (`D131439 <https://reviews.llvm.org/D131439>`_) * ``-z pack-relative-relocs`` is now available to support ``DT_RELR`` for glibc 2.36+. (`D120701 <https://reviews.llvm.org/D120701>`_) * ``--no-fortran-common`` (pre 12.0.0 behavior) is now the default. +* ``--load-pass-plugin`` has been added to load a new pass manager plugin. + (`D120490 <https://reviews.llvm.org/D120490>`_) +* ``--android-memtag-{mode=,stack,heap}`` have been added to synthesize SHT_NOTE for memory tags on Android. + (`D119384 <https://reviews.llvm.org/D119384>`_) * ``FORCE_LLD_DIAGNOSTICS_CRASH`` environment variable is now available to force LLD to crash. (`D128195 <https://reviews.llvm.org/D128195>`_) +* ``--wrap`` semantics have been refined. + (`rG7288b85cc80f1ce5509aeea860e6b4232cd3ca01 <https://reviews.llvm.org/rG7288b85cc80f1ce5509aeea860e6b4232cd3ca01>`_) + (`D118756 <https://reviews.llvm.org/D118756>`_) + (`D124056 <https://reviews.llvm.org/D124056>`_) +* ``--build-id={md5,sha1}`` are now implemented with truncated BLAKE3. + (`D121531 <https://reviews.llvm.org/D121531>`_) +* ``--emit-relocs``: ``.rel[a].eh_frame`` relocation offsets are now adjusted. + (`D122459 <https://reviews.llvm.org/D122459>`_) +* ``--emit-relocs``: fixed missing ``STT_SECTION`` when the first input section is synthetic. + (`D122463 <https://reviews.llvm.org/D122463>`_) +* ``(TYPE=<value>)`` can now be used in linker scripts. + (`D118840 <https://reviews.llvm.org/D118840>`_) +* Local symbol initialization is now performed in parallel. + (`D119909 <https://reviews.llvm.org/D119909>`_) + (`D120626 <https://reviews.llvm.org/D120626>`_) Breaking changes ---------------- +* Archives are now parsed as ``--start-lib`` object files. If a member is neither + an ELF relocatable object file nor an LLVM bitcode file, ld.lld will give a warning. + (`D119074 <https://reviews.llvm.org/D119074>`_) * The GNU ld incompatible ``--no-define-common`` has been removed. * The obscure ``-dc``/``-dp`` options have been removed. + (`D119108 <https://reviews.llvm.org/D119108>`_) * ``-d`` is now ignored. * If a prevailing COMDAT group defines STB_WEAK symbol, having a STB_GLOBAL symbol in a non-prevailing group is now rejected with a diagnostic. (`D120626 <https://reviews.llvm.org/D120626>`_) @@ -60,7 +85,13 @@ COFF Improvements MinGW Improvements ------------------ -* ... +* The ``--disable-reloc-section`` option is now supported. + (`D127478 <https://reviews.llvm.org/D127478>`_) +* The ``--exclude-symbols`` option is now supported. + (`D130118 <https://reviews.llvm.org/D130118>`_) + +* Support for an entirely new object file directive, ``-exclude-symbols:``, + has been implemented. (`D130120 <https://reviews.llvm.org/D130120>`_) MachO Improvements ------------------ @@ -71,6 +102,117 @@ MachO Improvements (`D129540 <https://reviews.llvm.org/D129540>`_, `D122258 <https://reviews.llvm.org/D122258>`_) +New flags +######### + +* ``-load_hidden`` and ``-hidden-l`` are now supported. + (`D130473 <https://reviews.llvm.org/D130473>`_, + `D130529 <https://reviews.llvm.org/D130529>`_) +* ``-alias`` is now supported. (`D129938 <https://reviews.llvm.org/D129938>`_) +* ``-no_exported_symbols`` and ``-exported_symbols_list <empty file>`` are now + supported. (`D127562 <https://reviews.llvm.org/D127562>`_) +* ``-w`` -- to suppress warnings -- is now supported. + (`D127564 <https://reviews.llvm.org/D127564>`_) +* ``-non_global_symbols_strip_list``, ``-non_global_symbols_no_strip_list``, and + ``-x`` are now supported. (`D126046 <https://reviews.llvm.org/D126046>`_) +* ``--icf=safe`` is now supported. + (`D128938 <https://reviews.llvm.org/D128938>`_, + `D123752 <https://reviews.llvm.org/D123752>`_) +* ``-why_live`` is now supported. + (`D120377 <https://reviews.llvm.org/D120377>`_) +* ``-pagezero_size`` is now supported. + (`D118724 <https://reviews.llvm.org/D118724>`_) + +Improvements +############ + +* Linker optimization hints are now supported. + (`D129427 <https://reviews.llvm.org/D129427>`_, + `D129059 <https://reviews.llvm.org/D129059>`_, + `D128942 <https://reviews.llvm.org/D128942>`_, + `D128093 <https://reviews.llvm.org/D128093>`_) +* Rebase opcodes are now encoded more compactly. + (`D130180 <https://reviews.llvm.org/D130180>`_, + `D128798 <https://reviews.llvm.org/D128798>`_) +* C-strings are now aligned more compactly. + (`D121342 <https://reviews.llvm.org/D121342>`_) +* ``--deduplicate-literals`` (and ``--icf={safe,all}``) now fold the + ``__cfstring`` section. + (`D130134 <https://reviews.llvm.org/D130134>`_, + `D120137 <https://reviews.llvm.org/D120137>`_) +* ICF now folds the ``__objc_classrefs`` section. + (`D121053 <https://reviews.llvm.org/D121053>`_) +* ICF now folds functions with identical LSDAs. + (`D129830 <https://reviews.llvm.org/D129830>`_) +* STABS entries for folded functions are now omitted. + (`D123252 <https://reviews.llvm.org/D123252>`_) +* ``__objc_imageinfo`` sections are now folded. + (`D130125 <https://reviews.llvm.org/D130125>`_) +* Dylibs with ``LC_DYLD_EXPORTS_TRIE`` can now be read. + (`D129430 <https://reviews.llvm.org/D129430>`_) +* Writing zippered dylibs is now supported. + (`D124887 <https://reviews.llvm.org/D124887>`_) +* C-string literals are now included in the mapfile. + (`D118077 <https://reviews.llvm.org/D118077>`_) +* Symbol names in several more diagnostics are now demangled. + (`D130490 <https://reviews.llvm.org/D130490>`_, + `D127110 <https://reviews.llvm.org/D127110>`_, + `D125732 <https://reviews.llvm.org/D125732>`_) +* Source information is now included in symbol error messages. + (`D128425 <https://reviews.llvm.org/D128425>`_, + `D128184 <https://reviews.llvm.org/D128184>`_) +* Numerous other improvements were made to diagnostic messages. + (`D127753 <https://reviews.llvm.org/D127753>`_, + `D127696 <https://reviews.llvm.org/D127696>`_, + `D127670 <https://reviews.llvm.org/D127670>`_, + `D118903 <https://reviews.llvm.org/D118903>`_, + `D118798 <https://reviews.llvm.org/D118798>`_) +* Many performance and memory improvements were made. + (`D130000 <https://reviews.llvm.org/D130000>`_, + `D128298 <https://reviews.llvm.org/D128298>`_, + `D128290 <https://reviews.llvm.org/D128290>`_, + `D126800 <https://reviews.llvm.org/D126800>`_, + `D126785 <https://reviews.llvm.org/D126785>`_, + `D121052 <https://reviews.llvm.org/D121052>`_) +* Order files and call graph sorting can now be used together. + (`D117354 <https://reviews.llvm.org/D117354>`_) +* Give LTO more precise symbol resolutions, which allows optimizations to be + more effective. + (`D119506 <https://reviews.llvm.org/D119506>`_, + `D119372 <https://reviews.llvm.org/D119372>`_, + `D119767 <https://reviews.llvm.org/D119767>`_) +* Added partial support for linking object files built with DTrace probes. + (`D129062 <https://reviews.llvm.org/D129062>`_) + +Fixes +##### + +* Programs using Swift linked with the 14.0 SDK but an older deployment target + no longer crash at startup when running on older iOS versions. This is because + we now correctly support ``$ld$previous`` symbols that contain an explicit + symbol name. (`D130725 <https://reviews.llvm.org/D130725>`_) +* Match ld64's behavior when an archive is specified both via + ``LC_LINKER_OPTION`` and via the command line. + (`D129556 <https://reviews.llvm.org/D129556>`_) +* ``-ObjC`` now correctly loads archives with Swift sections. + (`D125250 <https://reviews.llvm.org/D125250>`_) +* ``-lto_object_path`` now accepts a filename (instead of just a directory + name.) (`D129705 <https://reviews.llvm.org/D129705>`_) +* The ``LC_UUID`` hash now includes the output file's name. + (`D122843 <https://reviews.llvm.org/D122843>`_) +* ``-flat_namespace`` now correctly makes all extern symbols in a dylib + interposable. (`D119294 <https://reviews.llvm.org/D119294>`_) +* Fixed compact unwind output when linking on 32-bit hosts. + (`D129363 <https://reviews.llvm.org/D129363>`_) +* Exporting private symbols no longer triggers an assertion. + (`D124143 <https://reviews.llvm.org/D124143>`_) +* MacOS-only ``.tbd`` files are now supported when targeting Catalyst. + (`D124336 <https://reviews.llvm.org/D124336>`_) +* Thunk symbols now have local visibility, avoiding false duplicate symbol + errors. (`D122624 <https://reviews.llvm.org/D122624>`_) +* Fixed handling of relocatable object files within frameworks. + (`D114841 <https://reviews.llvm.org/D114841>`_) + WebAssembly Improvements ------------------------ |