lld 20.0.0git Release Notes¶
Warning
These are in-progress notes for the upcoming LLVM 20.0.0git release. Release notes for previous releases can be found on the Download Page.
Introduction¶
This document contains the release notes for the lld linker, release 20.0.0git. 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.
Non-comprehensive list of changes in this release¶
ELF Improvements¶
-z nosectionheaderhas been implemented to omit the section header table. The operation is similar tollvm-objcopy --strip-sections. (#101286)Section
CLASSlinker script syntax binds input sections to named classes, which are referenced later one or more times. This provides access to the automatic spilling mechanism of –enable-non-contiguous-regions without globally changing the semantics of section matching. It also independently increases the expressive power of linker scripts. (#95323)Supported relocation types for x86-64 target: *
R_X86_64_CODE_4_GOTPCRELX(#109783) (#116737) *R_X86_64_CODE_4_GOTTPOFF(#116634) *R_X86_64_CODE_4_GOTPC32_TLSDESC(#116909) *R_X86_64_CODE_6_GOTTPOFF(#117675)
Breaking changes¶
Removed support for the (deprecated) R_RISCV_RVC_LUI relocation. This was a binutils-internal relocation used during relaxation, and was not emitted by compilers/assemblers.
COFF Improvements¶
/includeglobhas been implemented to match the behavior of--undefined-globavailable for ELF./lldsavetempsallows saving select intermediate LTO compilation results (e.g. resolution, preopt, promote, internalize, import, opt, precodegen, prelink, combinedindex)./machine:arm64ecsupport completed, enabling the linking of ARM64EC images.COFF weak anti-dependency alias symbols are now supported.
MinGW Improvements¶
--undefined-globis now supported by translating into the/includeglobflag.