I want to create a single project using a single source tree (I'm using Subversion with the subclipse plugin). The source tree contains the directories src/java and src/C. I want to be able to use the java builder on all my .java files under src/java and I want to use the CDT builder (and Scanner Configuration Builder) for all my .c files under src/C. I cannot figure out how to have both builders active in the same project.