How to exclude files from the Eclipse clean command


I want to exclude files from being removed by Eclipse's Project Clean. I'm working on an SDL application and I therefore need to have the SDL.dll file present in the Debug folder.

Is it possible to exclude for example *.dll files from being removed by the clean operation? If so, how do I do that? I don't have a makefile present in my Eclipse CDT project so I can't just edit the clean goal.

Put the dll into a source folder, it will be copied automatically in the target folder