Re: [PATCH v2] llvm: enable LLVMgold.so build by adding binutils dependency

["Varatharajan, Deepesh" <deepesh.varatharajan@windriver.com>]

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On Tue, Jan 20, 2026 at 03:53 AM, mark.yang wrote:

> 
> The build reproduction steps and the intention for this patch can be found
> in the v1 patch at https://lists.openembedded.org/g/openembedded-core/topic/117252728
> .
> 
> PACKAGECONFIG:remove:class-native = "lto thin-lto"
> Due to the configuration, llvm-native cannot enable lto in PACKAGECONFIG
> in any way.
> 
> 
> When attempting to use clang + lto, components that cannot use the lld
> linker (and instead use the bfd linker) require the LLVMgold.so plugin.
> To achieve this, binutils and the -DLLVM_BINUTILS_INCDIR flag in CMake are
> required.
> ( https://github.com/llvm/llvm-project/blob/main/clang/docs/ThinLTO.rst#basic
> )
> 
> Anyway, llvm-native cannot have LTO enabled due to the `remove`.
> -DLLVM_ENABLE_LTO=Full determines whether LLVM itself will be built with
> LTO applied.
> 
> However, even if LLVM is not built using LTO, I think the environment
> should still be configured so that other components using the LLVM/clang
> toolchain can use LTO.
> 

Hi Mark,

Thanks for the explanation. However, LTO builds are not part of the default workflow,
and adding binutils to DEPENDS would increase build time for all LLVM builds. I guess
passing -DLLVM_BINUTILS_INCDIR via a new PACKAGECONFIG is a better option without
impacting default builds.

Regards,
Deepesh

> 
> 
>

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