Bug 21583 Generate Javadoc won't link prereqed projects
In the export wizard for generating javadoc, there is no easy way to link the javadoc from a prereqed project. The wizard has a screen for linking in javadoc from libraries included in the classpath, but projects in the classpath do not show up. I got a temporary workaround from the news group. Just add a "-link URL_TO_OTHER_PROJECT_JAVADOC" in the javadoc options page, but there should be an easier way to do this.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javadocexport/JavadocStandardWizardPage.java
/**
		 * @see IListAdapter#customButtonPressed(DialogField, int)
		 */
		public void customButtonPressed(DialogField field, int index) {
				if(index == 2)
					doEditButtonPressed();
		}
		/**
		 * @see IListAdapter#selectionChanged(DialogField)
		 */
		public void selectionChanged(DialogField field) {
			List selection = fListDialogField.getSelectedElements();
			if(selection.size() != 1) {
					fListDialogField.enableButton(2, false);
			} else {
				fListDialogField.enableButton(2, true);
			}