How to Troubleshoot 'java.lang.UnsatisfiedLinkError: Can't find dependent libraries' in JNI Projects?

Troubleshooting UnsatisfiedLinkError Due to Missing Dependent Libraries in JNI Projects

When working with Java projects employing the Java Native Interface (JNI), encountering the error "java.lang.UnsatisfiedLinkError: Can't find dependent libraries" can be frustrating. This error arises when the Java Virtual Machine (JVM) cannot locate the native libraries required by your custom library, which in this case is mylib.dll.

Causes and Solutions

Despite trying several solutions mentioned in the original post, the issue remains unresolved. Here are some further troubleshooting steps to consider:

1. Verify Library Dependency:
   Use Dependency Walker or a similar tool to ensure that mylib.dll explicitly lists libsndfile-1.dll as a dependency. Missing or incorrect dependencies can cause the UnsatisfiedLinkError.
2. Check Windows PATH:
   Ensure that the directory containing libsndfile-1.dll is included in the Windows PATH environment variable. This ensures that the JVM can locate the necessary library.
3. Explore java.library.path:
   As suggested in the provided solution, verify the value of the java.library.path system property using the command "java -XshowSettings:properties -version". This property specifies the path(s) searched by the JVM for native libraries. Add the directory containing mylib.dll and libsndfile-1.dll to this path.
4. Examine Native Library Loading Mechanism:
   If the above steps fail, consider inspecting the mechanism used to load native libraries. By default, Java uses the "first found" approach, where it loads the first instance of a library matching the specified name. Ensure that the correct versions and dependencies are present in the loaded library.

Additional Tips

• Use jna-platform: Consider utilizing the jna-platform library, which automatically detects and loads platform-specific dependencies, potentially simplifying library loading.
• Contextualize the Issue: Provide more information about the operating system and Java version being used, as well as any relevant build scripts or configuration.

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