title: Why is eclipse trying to compile files not in my build path?
body: <p>I have a rather large project which contains a number of third-party dependencies which are linked via svn:externals.  These include tomcat and blazeDS, which are packaged by our installer via ant.  The problem is that these projects contain dozens of sample JSP pages, and eclipse chokes on them when trying to build the project, producing hundreds of errors.</p>
  
  <p>Our project setup is something like this:</p>
  
  <pre><code>src/
      main/
      test/
  third-party/
      blazeDS/
      tomcat/
      etc.
  </code></pre>
  
  <p>Now, in eclipse, my project's build path is set to <em>only</em> include subfolders in src/main and src/test.  Yet, for some reason, it still tries to build everything beneath third-party.  I have clicked on third-party and selected "remove from build path", but this had no effect.  I even tried adding the third-party folder to the build path, and then excluding "<strong>", "</strong>/*", and "**/*.jsp", but again, to no effect.</p>
  
  <p>What is going on here?</p>
  
  <p>Edit: Thanks for the suggestions, though unfortunately, they don't seem to fix the issue.  I don't have the CheckStyle plugin installed (I'm using Eclipse 3.4.1 with the only custom plugins being subclipse and flex builder), and I tried disabling all extra builders except for Java, but the errors are still being thrown.</p>