a05384dc89
This brings back the original version of D81359.
I have found several use cases now.
* Unlike GNU ld, LLD's relocation processing is one pass. If we decide to
optimize(relax) R_X86_64_{,REX_}GOTPCRELX, we will suppress GOT generation and
cannot undo the decision later. Optimizing R_X86_64_REX_GOTPCRELX can usually
make it easy to hit `relocation R_X86_64_REX_GOTPCRELX out of range` because
the distance to GOT is usually shorter. Without --no-relax, the user has to
recompile with `-Wa,-mrelax-relocations=no`.
* The option would help during my investigationg of the root cause of https://git.kernel.org/linus/09e43968db40c33a73e9ddbfd937f46d5c334924
* There is need for relaxation for AArch64 & RISC-V. Implementing this for
x86-64 improves consistency with little target-specific cost (two-line
X86_64.cpp change).
Reviewed By: alexander-shaposhnikov
Differential Revision: https://reviews.llvm.org/D113615
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========================
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lld 14.0.0 Release Notes
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========================
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.. contents::
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:local:
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.. warning::
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These are in-progress notes for the upcoming LLVM 14.0.0 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 14.0.0.
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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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* ``--export-dynamic-symbol-list`` has been added.
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(`D107317 <https://reviews.llvm.org/D107317>`_)
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* ``--why-extract`` has been added to query why archive members/lazy object files are extracted.
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(`D109572 <https://reviews.llvm.org/D109572>`_)
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* ``e_entry`` no longer falls back to the address of ``.text`` if the entry symbol does not exist.
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Instead, a value of 0 will be written.
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(`D110014 <https://reviews.llvm.org/D110014>`_)
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Architecture specific changes:
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* The x86-32 port now supports TLSDESC (``-mtls-dialect=gnu2``).
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(`D112582 <https://reviews.llvm.org/D112582>`_)
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* For x86-64, ``--no-relax`` now suppresses ``R_X86_64_GOTPCRELX`` and
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``R_X86_64_REX_GOTPCRELX`` GOT optimization
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(`D113615 <https://reviews.llvm.org/D113615>`_)
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Breaking changes
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----------------
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* ...
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COFF Improvements
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-----------------
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* ...
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MinGW Improvements
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------------------
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* ...
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MachO Improvements
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------------------
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* Item 1.
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WebAssembly Improvements
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------------------------
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