Matlab external diff missing sys/java/jre/maca64/jre/bin/java on MATLAB R2023b

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John Goulet 2024-2-19

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2084013-matlab-external-diff-missing-sys-java-jre-maca64-jre-bin-java-on-matlab-r2023b

移动：Walter Roberson 2024-2-19

After upgrading to 2023b, the external comparison capability is no longer working on my m1 mac.

I have followed the steps here (Customize External Source Control to Use MATLAB for Diff and Merge - MATLAB & Simulink (mathworks.com))

Enabled MathWorks source control integration.
Run comparisons.ExternalSCMLink.setup() in the MATLAB command window.

When I attempt to run a comparison using the system terminal:

`git difftool --no-prompt -t mlDiff HEAD origin/master -- path/to/my/file.slx`

Here is the error message:

/Applications/MATLAB_R2023b.app/bin/maca64/diffLinkClient: line 23: /Applications/MATLAB_R2023b.app/sys/java/jre/maca64/jre/bin/java: No such file or directory
fatal: external diff died, stopping at path/to/my/file.slx

If I attempt to cd into `cd /Applications/MATLAB_R2023b.app/sys/java`, it appears that the directory java directory does not exist.

Is there a workaround for this?

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Walter Roberson 2024-2-19

I believe this is a limitation of R2023b on Mac Silicon

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Answer 1

John Goulet 2024-2-19

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2084013-matlab-external-diff-missing-sys-java-jre-maca64-jre-bin-java-on-matlab-r2023b#answer_1412083

移动：Walter Roberson 2024-2-19

I found a workaround. You can symlink the java binary used by MATLAB (found by using jenv) to /Applications/MATLAB_R2023b.app/sys/java/jre/maca64/jre/bin/java

1. Get java bin location used by MATLAB

- In a matlab command window, enter `jenv`

- Copy the path of the java binary located in the 'Home' JavaEnvironment listed by `jenv`

2. Navigate to `/Applications/MATLAB_R2023b.app/sys/`

1. Create the subdirectory: `/java/jre/maca64/jre/bin/`

2. `cd /Applications/MATLAB_R2023b.app/sys/java/jre/maca64/jre/bin/`

3. `ln -s /Library/Java/JavaVirtualMachines/amazon-corretto-8.jdk/Contents/Home/jre/bin/java ./`

3. External diff should work