To resolve the issue where find_package cannot locate log4cplus after installing it with vcpkg in a Qt project within CLion, follow these steps: Verify Installation Location: Check the directory structure under your vcpkg installation to confirm that log4cplus was successfully installed. Set Environment Variables: Add the paths to vcpkg\installed\x64-windows\include and vcpkg\installed\x64-windows\lib (adjust for your system)…