RFR: 8350801: Add a code signing hook to the JDK build system [v4]

[Frederic Thevenet]

On Tue, 25 Mar 2025 15:50:36 GMT, Frederic Thevenet <fthevenet at openjdk.org> wrote:

>> OpenJDK vendors who provide binary distributions for the Windows and macOS platforms generally need to ensure that every native executable file and dynamic library that are part of the binary builds are digitally signed using a set of OS specific APIs.
>> 
>> The JDK build systems already provides the ability to invoke Apple code signing API during the build on macOS, but there is no equivalent support for Windows.which means that each vendor has had to come up with their own way to integrate the code signing step into their build pipeline.
>> As the shape of the JDK binary deliverable evolved to accommodate features like modules, signing binaries as an after-the-fact process has gradually become more complicated and error prone, in particular with regard to the introduction of JEP 493.
>> 
>> This change aims to solve this by introducing a "signing hook" that users can use to specify a custom script that will be invoked by the build system for every native executable of library compiled and linked as part of the build target.
>> This is to provide enough flexibility for each vendor to include their own specific configuration and/or signing logic, not limited to a specific set of platforms.
>
> Frederic Thevenet has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update make/autoconf/jdk-options.m4
>   
>   Co-authored-by: Magnus Ihse Bursie <mag at icus.se>

Thank you for your thorough review and precious advice!

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PR Comment: https://git.openjdk.org/jdk/pull/23807#issuecomment-2751768063