RFR: 8371893: [macOS aarch64] use dead_strip linker option to reduce binary size

[Andrew Haley]

On Fri, 14 Nov 2025 11:25:05 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

> The dead_strip linker option on macOS removes functions and data that are unreachable by the entry point or exported symbols.
> Setting it can reduce the size of some binaries we generate quite a lot, for example (product build, Xcode 15 is used) :
> (before -> after setting the option)
> 
> 1.4M -> 1.1M images/jdk/lib/libfontmanager.dylib
> 264K -> 248K images/jdk/lib/libjavajpeg.dylib
> 152K -> 132K images/jdk/lib/libjli.dylib
> 388K -> 296K images/jdk/lib/liblcms.dylib
> 164K -> 128K images/jdk/lib/libzip.dylib
> 
> 
> and libjvm :
> 
> 20M -> 18M images/jdk/lib/server/libjvm.dylib
> 146M -> 137M images/jdk/lib/server/libjvm.dylib.dSYM

Surely you're going to use features that are provided for debugging. They aren't called from anywhere, but they are used when debugging HotSpot. And you still need them even if you're not using a debug build.

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PR Comment: https://git.openjdk.org/jdk/pull/28319#issuecomment-3548890774