[llvm-dev] Embedding LLD version to executables

[Rafael Espíndola via llvm-dev]

I am ok with both ".note.linker-version" and adding an entry to .comment.

I guess I have a small preference for .comment if this is a free format string.

Cheers,
Rafael


On 18 October 2016 at 21:44, Rui Ueyama via llvm-dev
<llvm-dev at lists.llvm.org> wrote:
> I'd like to make LLD embed version information so that we can determine if
> an executable was created by LLD and if that's the case which version of
> LLD.
>
> ld.bfd doesn't seem to embed any information, so we cannot tell whether an
> executable was linked by ld.bfd or not easily.
>
> ld.gold embeds a string "GNU gold <version>" as ".note.gnu.gold-version"
> section contents.
>
> I'm wondering what we should do for LLD. The gold's way seems almost right,
> but I think we don't want to use the same section name because it contains
> "gold" as part of the section name. However, at the same time, I don't
> believe we want to create ".note.gnu.lld-version", because if we do, all
> programs that determine linker version need to look at
> ".note.gnu.<linker-name>-version" for all known linkers. That's absurd.
> (Also, our product is not GNU, so ".gnu" part is probably irrelevant.)
>
> I'm leaning towards ".note.linker-version" in hope that other linkers follow
> it.
>
> Any opinions?
>
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