how to force cdt to rebuild index with my new include.

1. The include file which CDT use when you run compile is save to
workspace/.metadata/.plugins/org.eclipse.cdt.make.core/, and file name is
Your_ProjectName.sc –> just remove it
2. The index file is save to
workspace/.metadata/.plugins/org.eclipse.cdt.core/, -- > just remove this
directory
3. Run rebuild index from CDT