The easiest way I've discovered to duplicate the settings for a project is to use another workspace. It takes a few steps to set up but you should only need to do it once.
1. Start a 2nd copy of eclipse and select or create a new workspace.
2. Import your baseline code.
3. Rename the project to something generic like NewProject
4. If your project has files you don't want to be imported into new projects delete them. I find it helpful to keep a few (like main.cpp)
Now back to your original workspace.
1. File->Import->Existing Projects into Workspace Next
button
2. Use Browse...
to go to your newly created workspace and select NewProject.
3. Check the Copy projects into workspace
checkbox.
4. If you have warnings about the project already existing try clicking the Refresh
button and make sure you don't have a folder in the current workspace with the same name. [ You can delete a project but not remove it from the hard disk so you have to make sure the intended folder name is not in use. ]
5. Rename the project to your desired name.
6. Start coding...
All the toolchain settings, include paths and library paths should be intact. It seems like a lot of work, but once you do it once its not too bad (as long as you can keep duplicating that one project).