title: How to let eclipse ignore specific sub-folder
body: <p>I'm not familiar with eclipse. I have a question as this topic title. The scenario is that I want create a sub-folder "test" (for unit test) in folder src. But after the creation of folder "test", eclipse will automatically add this "test" folder and its content to current project. This leads to an error of multiple definition of "main" function because under "test" folder there is also a cpp file that contains main function. What I want is that put the "test" folder in src folder but this folder is not belong to current project, this means that when I compile current project the files under "test" won't be compiled (There is another test project do this). Anybody know? Thank you in advance!</p>