RFR: 8336849: Remove .llvm_addrsig section from JDK/VM static libraries (.a files)

[Jiangli Zhou]

On Sat, 20 Jul 2024 00:20:19 GMT, Jiangli Zhou <jiangli at openjdk.org> wrote:

> Please review this PR that strips the `.llvm_addrsig` section from JDK and hotspot `.a` static libraries when building with clang. Please see https://bugs.openjdk.org/browse/JDK-8336849 description for details.

Thanks for looking into this

> This all seems very odd to me. Where do we set `--icf=safe` to the linker, and why? Why has this not shown up earlier?

As described in earlier comment, `-Wl,--icf=safe` could be specified when linking the launcher executable using `libjvm.a` and etc. That's the #2 step described in the comment. I found following links with some detaills on `--icf=safe`:

- https://nxmnpg.lemoda.net/1/ld.lld (search for `icf`)
- https://github.com/rui314/mold/issues/484 (some useful info, not for lld)

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PR Comment: https://git.openjdk.org/jdk/pull/20265#issuecomment-2269520892