bfb75348e2
Based on the initial spec proposal: https://github.com/WebAssembly/tool-conventions/blob/master/DynamicLinking.md The llvm/codegen side of this is still missing but I believe this change is still worth landing as an incremental step Differential Revision: https://reviews.llvm.org/D54249 llvm-svn: 346918
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=======================
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lld 8.0.0 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 8.0.0 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 8.0.0.
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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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* lld now supports RISC-V. (`r339364
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<https://reviews.llvm.org/rL339364>`_)
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* Default image base address has changed from 65536 to 2 MiB for i386
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and 4 MiB for AArch64 to make lld-generated executables work better
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with automatic superpage promotion. FreeBSD can promote contiguous
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non-superpages to a superpage if they are aligned to the superpage
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size. (`r342746 <https://reviews.llvm.org/rL342746>`_)
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* lld/Hexagon can now link Linux kernel and musl libc for Qualcomm
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Hexagon ISA.
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* The following flags have been added: ``-z interpose``, ``-z global``
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COFF Improvements
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-----------------
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* PDB GUID is set to hash of PDB contents instead to a random byte
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sequence for build reproducibility.
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* The following flags have been added: ``/force:multiple``
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* lld now can link against import libraries produced by GNU tools.
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* lld can create thunks for ARM, to allow linking images over 16 MB.
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MinGW Improvements
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------------------
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* lld can now automatically import data variables from DLLs without the
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use of the dllimport attribute.
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* lld can now use existing normal MinGW sysroots with import libraries and
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CRT startup object files for GNU binutils. lld can handle most object
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files produced by GCC, and thus works as a drop-in replacement for
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ld.bfd in such environments.
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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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* Add initial support for creating shared libraries (-shared).
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Note: The shared library format is still under active development and may
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undergo significant changes in future versions.
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See: https://github.com/WebAssembly/tool-conventions/blob/master/DynamicLinking.md
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