vasilito
cb424d7448
verify-patch-sanity.py validates every active recipe .patch has internally- consistent hunk line counts — catching the 'malformed patch at line N' failure at commit/CI/preflight time instead of hours into a cook. This cycle hit that class three times (qtwaylandscanner, sddm, xwayland), each only discovered when cookbook tried to apply the patch. Running it across the repo found 29 latent malformed patches (validated against GNU patch: e.g. relibc/P3-sysv-ipc reproduces 'malformed patch at line 22'). They were harmless only because they sit in vendored recipes (baked, not re- applied) — but would fail on any version-bump re-derivation. --fix recounts the hunk headers (body untouched) and repaired all 29. Wired into build-preflight.sh (Phase 1.0D) and redbear-ci.yml, with a unit test (test-patch-sanity.sh). Skips archived/legacy trees and unvalidatable formats (empty placeholders, bare-@@ git hunks).
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===========================
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lld |release| Release Notes
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===========================
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.. contents::
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:local:
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.. only:: PreRelease
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.. warning::
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These are in-progress notes for the upcoming LLVM |release| release.
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Release notes for previous releases can be found on
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`the Download Page <https://releases.llvm.org/download.html>`_.
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Introduction
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============
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This document contains the release notes for the lld linker, release |release|.
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Here we describe the status of lld, including major improvements
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from the previous release. All lld releases may be downloaded
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from the `LLVM releases web site <https://llvm.org/releases/>`_.
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Non-comprehensive list of changes in this release
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=================================================
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ELF Improvements
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----------------
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* Added ``-z dynamic-undefined-weak`` to make undefined weak symbols dynamic
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when the dynamic symbol table is present.
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(`#143831 <https://github.com/llvm/llvm-project/pull/143831>`_)
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* For ``-z undefs`` (default for ``-shared``), relocations referencing undefined
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strong symbols now behave like relocations referencing undefined weak symbols.
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* ``--why-live=<glob>`` prints for each symbol matching ``<glob>`` a chain of
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items that kept it live during garbage collection. This is inspired by the
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Mach-O LLD feature of the same name.
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* ``--thinlto-distributor=`` and ``--thinlto-remote-compiler=`` options are
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added to support Integrated Distributed ThinLTO.
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(`#142757 <https://github.com/llvm/llvm-project/pull/142757>`_)
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* Linker script ``OVERLAY`` descriptions now support virtual memory regions
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(e.g. ``>region``) and ``NOCROSSREFS``.
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* When the last ``PT_LOAD`` segment is executable and includes BSS sections,
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its ``p_memsz`` member is now correct.
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(`#139207 <https://github.com/llvm/llvm-project/pull/139207>`_)
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* Spurious ``ASSERT`` errors before the layout converges are now fixed.
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* For ARM and AArch64, ``--xosegment`` and ``--no-xosegment`` control whether
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to place executable-only and readable-executable sections in the same
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segment. The default option is ``--no-xosegment``.
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(`#132412 <https://github.com/llvm/llvm-project/pull/132412>`_)
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* For AArch64, added support for the ``SHF_AARCH64_PURECODE`` section flag,
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which indicates that the section only contains program code and no data.
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An output section will only have this flag set if all input sections also
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have it set. (`#125689 <https://github.com/llvm/llvm-project/pull/125689>`_,
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`#134798 <https://github.com/llvm/llvm-project/pull/134798>`_)
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* For AArch64 and ARM, added ``-zexecute-only-report``, which checks for
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missing ``SHF_AARCH64_PURECODE`` and ``SHF_ARM_PURECODE`` section flags
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on executable sections.
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(`#128883 <https://github.com/llvm/llvm-project/pull/128883>`_)
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* For AArch64, ``-z nopac-plt`` has been added.
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* For AArch64 and X86_64, added ``--branch-to-branch``, which rewrites branches
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that point to another branch instruction to instead branch directly to the
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target of the second instruction. Enabled by default at ``-O2``.
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* For AArch64, added support for ``-zgcs-report-dynamic``, enabling checks for
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GNU GCS Attribute Flags in Dynamic Objects when GCS is enabled. Inherits value
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from ``-zgcs-report`` (capped at ``warning`` level) unless user-defined,
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ensuring compatibility with GNU ld linker.
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* The default Hexagon architecture version in ELF object files produced by
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lld is changed to v68. This change is only effective when the version is
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not provided in the command line by the user and cannot be inferred from
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inputs.
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* For LoongArch, the initial-exec to local-exec TLS optimization has been implemented.
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* For LoongArch, several relaxation optimizations are supported, including relaxation for
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``R_LARCH_PCALA_HI20/LO12`` and ``R_LARCH_GOT_PC_HI20/LO12`` relocations, instruction
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relaxation for ``R_LARCH_CALL36``, TLS local-exec (``LE``)/global dynamic (``GD``)/
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local dynamic (``LD``) model relaxation, and TLSDESC code sequence relaxation.
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* For RISCV, an oscillation bug due to call relaxation is now fixed.
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(`#142899 <https://github.com/llvm/llvm-project/pull/142899>`_)
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* For x86-64, the ``.ltext`` section is now placed before ``.rodata``.
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Breaking changes
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----------------
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* Executable-only and readable-executable sections are now allowed to be placed
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in the same segment by default. Pass ``--xosegment`` to lld in order to get
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the old behavior back.
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* When using ``--no-pie`` without a ``SECTIONS`` command, the linker uses the
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target's default image base. If ``-Ttext=`` or ``--section-start`` specifies
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an output section address below this base, there will now be an error.
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``--image-base`` can be set at a lower address to fix the error.
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(`#140187 <https://github.com/llvm/llvm-project/pull/140187>`_)
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COFF Improvements
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-----------------
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* ``/thinlto-distributor`` and ``/thinlto-remote-compiler`` options
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added to support Integrated Distributed ThinLTO.
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(`#147265 <https://github.com/llvm/llvm-project/pull/147265>`_)
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MinGW Improvements
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------------------
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MachO Improvements
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------------------
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WebAssembly Improvements
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------------------------
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Fixes
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#####
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