On Tue, 2 Dec 2025 16:11:02 GMT, Henry Jen <[email protected]> wrote:

>> This PR include build changes from @magicus and jlink change to verify the 
>> build signature.
>> 
>> Tested with local builds for MacOS and Linux as below shows that cross 
>> linking with same build is working while linking with different build failed 
>> with error message.
>> 
>> ❯ export 
>> JAVA_HOME=./build/macosx-x86_64-server-fastdebug/images/jdk-bundle/jdk-26.jdk/Contents/Home
>>                                                                              
>>                                                                              
>>        
>> ❯ java --version
>> openjdk 26-internal 2026-03-17
>> OpenJDK Runtime Environment (fastdebug build 
>> 26-internal-adhoc.hjen.JDK-8347831)
>> OpenJDK 64-Bit Server VM (fastdebug build 
>> 26-internal-adhoc.hjen.JDK-8347831, mixed mode, sharing)
>>                                                                              
>>                                                                              
>>        
>> ❯ jlink --version                                                            
>>            
>> 26-internal
>>                                                                              
>>                                                                              
>>        
>> ❯ jlink --module-path ./build/linux-x86_64-server-release/images/jdk/jmods 
>> --add-modules java.base --output linux                                       
>>                                                                              
>>                     
>>                                                                              
>>                                                                              
>>        
>> ❯ jlink --add-modules java.base --output macos
>>                                                             
>> ❯ jlink --module-path ~/linux/jdk-25.0.1/jmods --add-modules java.base 
>> --output linux25    
>> Error: jlink build N/A-26-internal-adhoc.hjen.JDK-8347831-2026-03-17 does 
>> not match target java.base build N/A
>>                                                                              
>>                                                                              
>>        
>> ❯ jlink --module-path 
>> /Library/Java/JavaVirtualMachines/jdk-25.jdk/Contents/Home/jmods 
>> --add-modules java.base --output macos25 
>> Error: jlink build N/A-26-internal-adhoc.hjen.JDK-8347831-2026-03-17 does 
>> not match target java.base build N/A
>
> Henry Jen has updated the pull request with a new target base due to a merge 
> or a rebase. The incremental webrev excludes the unrelated changes brought in 
> by the merge/rebase. The pull request contains 10 additional commits since 
> the last revision:
> 
>  - Merge openjdk/master
>  - adapt review feedbacks
>  - remove the extra space
>  - Update the error message when not finding release signature
>  - Treat missing release.txt as emptry release signature
>  - Refactoring to clarify version checking cases
>  - Address review feedbacks
>  - Use release.txt from java.base module in current and target for comparison
>  - JLink to check java build information
>  - Build changes to generate release.txt for java.base and jdk.jlink.

Build change looks ok.

-------------

Marked as reviewed by erikj (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/28155#pullrequestreview-3531592519

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