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Diffstat (limited to 'docs/ReleaseNotes.rst')
| -rw-r--r-- | docs/ReleaseNotes.rst | 60 |
1 files changed, 48 insertions, 12 deletions
diff --git a/docs/ReleaseNotes.rst b/docs/ReleaseNotes.rst index c02cc586c795..0bebfb3fb1ce 100644 --- a/docs/ReleaseNotes.rst +++ b/docs/ReleaseNotes.rst @@ -13,10 +13,12 @@ lld 8.0.0 Release Notes Introduction ============ -This document contains the release notes for the lld linker, release 8.0.0. -Here we describe the status of lld, including major improvements -from the previous release. All lld releases may be downloaded -from the `LLVM releases web site <https://llvm.org/releases/>`_. +lld is a high-performance linker that supports ELF (Unix), COFF (Windows), +Mach-O (macOS), MinGW and WebAssembly. lld is command-line-compatible with +GNU linkers and Microsoft link.exe and is significantly faster than the +system default linkers. + +nlld 8.0.0 has lots of feature improvements and bug fixes. Non-comprehensive list of changes in this release ================================================= @@ -33,27 +35,66 @@ ELF Improvements non-superpages to a superpage if they are aligned to the superpage size. (`r342746 <https://reviews.llvm.org/rL342746>`_) +* lld now attempts to place a ``.note`` segment in the first page of a + generated file, so that you can find some important information + (``.note.gnu.build-id`` in particular) in a core file even if a core + file is truncated by ulimit. + (`r349524 <https://reviews.llvm.org/rL349524>`_) + +* lld now reports an error if ``_GLOBAL_OFFSET_TABLE_`` symbol is + defined by an input object file, as the symbol is supposed to be + synthesized by the linker. + (`r347854 <https://reviews.llvm.org/rL347854>`_) + * lld/Hexagon can now link Linux kernel and musl libc for Qualcomm Hexagon ISA. * Initial MSP430 ISA support has landed. -* The following flags have been added: ``-z interpose``, ``-z global`` - * lld now uses the ``sigrie`` instruction as a trap instruction for MIPS targets. +* lld now creates a TLS segment for AArch64 with a slightly larger + alignment requirement, so that the loader makes a few bytes room + before each TLS segment at runtime. The aim of this change is to + make room to accomodate nonstandard Android TLS slots while keeping + the compatibility with the standard AArch64 ABI. + (`r350681 <https://reviews.llvm.org/rL350681>`_) + +* The following flags have been added: ``--call-graph-profile``, + ``--no-call-graph-profile``, ``--warn-ifunc-textrel``, + ``-z interpose``, ``-z global``, ``-z nodefaultlib`` + COFF Improvements ----------------- * PDB GUID is set to hash of PDB contents instead to a random byte sequence for build reproducibility. +* ``/pdbsourcepath:`` is now also used to make ``"cwd"``, ``"exe"``, ``"pdb"`` + in the env block of PDB outputs absolute if they are relative, and to make + paths to obj files referenced in PDB outputs absolute if they are relative. + Together with the previous item, this makes it possible to generate + executables and PDBs that are fully deterministic and independent of the + absolute path to the build directory, so that different machines building + the same code in different directories can produce exactly the same output. + * The following flags have been added: ``/force:multiple`` * lld now can link against import libraries produced by GNU tools. -* lld can create thunks for ARM, to allow linking images over 16 MB. +* lld can create thunks for ARM and ARM64, to allow linking larger images + (over 16 MB for ARM and over 128 MB for ARM64) + +* Several speed and memory usage improvements. + +* lld now creates debug info for typedefs. + +* lld can now link obj files produced by ``cl.exe /Z7 /Yc``. + +* lld now understands ``%_PDB%`` and ``%_EXT%`` in ``/pdbaltpath:``. + +* Undefined symbols are now printed in demangled form in addition to raw form. MinGW Improvements ------------------ @@ -76,11 +117,6 @@ MinGW Improvements Previously, the ``--build-id`` option did not actually generate a build id unless ``--pdb`` was specified. -MachO Improvements ------------------- - -* Item 1. - WebAssembly Improvements ------------------------ |