CDT supports doxygen out of the box. However, there seems to be no equivalent to the $ {tags} variable found in JDT.
To enable doxygen globally, go to Window> Preferences> C / C ++> Editor. Find the "Documentation Comments" section and set the default "Workspace" for Doxygen.
To enable doxygen for a specific project, right-click the project and select Properties. Then, on the C / C ++ General page, click "Enable Specific Project Settings", then select doxygen.
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