# C/C++ preferences

The C/C++ preference panel allows you to make changes to your C/C++ environment. Click Window > Preferences > C/C++ to view.

C/C++ Preference Options
Option | Description
--- | ---
Follow unindexed header files when producing the outline view | Activate to do a more exhaustive search of header paths to build a more complete outline view.
Build active configuration in each project | Activate to always build only the active configuration within a project.
Build all configurations in each project | Activate to always build all the configurations within a project.
Build configurations only when there are Eclipse resource changes within the project and its resources | Activate to build only when there are have been changes to any project and Eclipse resources.
Clear all 'do not show again' settings and show all hidden dialogs again | Activate to reset all alert settings and show all hidden dialogs.

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