Why Do I Get Semantic Errors in Eclipse After Updating the NDK and Using OpenCV4Android?

Eclipse Compilation Success with Lingering Semantic Errors

Eclipse Juno ADT users may encounter semantic errors despite successful compilation, particularly after updating the NDK and transitioning to g 4.7. Typically, these errors are associated with symbols from OpenCV4Android.

Observations:

• Command-line compilation using ndk-build succeeds.
• Semantic errors only manifest when a C file is opened in Eclipse.
• The CDT index is suspected to be responsible, as building or running the application fails upon opening C files.
• Some OpenCV symbols (pt, queryIdx, trainIdx) are unresolved, while others are not.

Failed Solutions:

Various attempts, including cleaning the project, rebuilding, and disabling/enabling the indexer, have proven ineffective.

Solution:

To resolve the issue, follow these steps:

1. In Eclipse, navigate to the selected project's properties.
2. Go to C/C General -> Code Analysis -> Launching.
3. Uncheck both check boxes (possibly labeled "Enable static error checking during launch" and "Enable semantic error checking during launch").
4. Close and reopen the project or restart Eclipse and rebuild.

Once these changes are made, Eclipse should accurately resolve symbol references and eliminate semantic errors while still allowing successful compilation.

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