Why Do I Still Get Semantic Errors in Eclipse Despite Successful Compilation?

Eclipse Compilation Success but Semantic Error Persistence

Despite successful compilation in Eclipse, semantic errors persist, often stemming from symbols employed by OpenCV4Android (e.g., distance, pt, queryIdx, trainIdx). This issue has plagued developers, as previous solutions have proven ineffective.

Observations and Troubleshooting

• CDT Index Suspected:

  • Command-line compilation succeeds.
  • Errors appear only after opening C files in Eclipse.
  • Field resolution errors prevent app execution.

• Interesting Behavior:

  • Code using queryIdx, line, and pt initially reports errors.
  • Wrapping these in temporary variables resolves the issue.
  • Only specific OpenCV symbols remain unresolved.

Solution

To resolve this persistent issue, follow these steps:

1. Open the project preferences from the Eclipse menu.
2. Navigate to: C/C General -> Code Analysis -> Launching
3. Uncheck both check boxes present in this section.
4. Close and reopen the project or restart Eclipse.
5. Rebuild the project.

By following these steps, the indexer issues that cause semantic errors during compilation should be resolved, allowing for successful builds and error-free code execution.

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