Missing classpath variable in eclipse project

I defined a classpath variable called shared_src in Eclipse under:

Window->Preferences->Java->Build Path->Classpath Variables

The variable points to a folder (C:\some_source).Now, I try to link that source folder using this variable.

In project properties, I go to:

Java Build Path -> Source -> Link Source and click on the Variables button.

The list of variables that shows up in the "Select Path Variable" pop-up does not include the shared_src variable that I defined initially.

My question is, is the shared_src va开发者_运维百科riable supposed to be available for linking source folders, and if so, how can I change my Eclipse setup to be able to use the variable?

Go to Window > Preferences then to General > Workspace > Linked Resources and define your folder here. Then you can use defined variable in project.