Recompile SplitterFactoryTest when Daikon changes

java/Makefile

@@ -1220,8 +1220,8 @@ check-serialize:
 
 .PHONY: junit
 junit: daikon/Daikon.class
-	@# This is not a prerequisite, so that "make -j" does not run it concurrently
-	@# with compiling Daikon, whose classes the SplitterFactoryTest rules use.
+	@# This is not a prerequisite:  when the daikon/Daikon.class recipe runs, its
+	@# sub-make builds SplitterFactoryTest, and this make would redo that work.
 	${MAKE} ${AUTO_GENERATED_CLASSES_2}
 	@echo "Running unit (not system) tests..."
 	LC_ALL=en_US.UTF-8 ${JAVA_COMMAND} org.junit.runner.JUnitCore daikon.test.AllTestsSuite
@@ -1468,8 +1468,9 @@ list_java_files: showvar_JAVA_FILES
 ### Automatically generated files
 ###
 
-# This must NOT depend on "daikon/Daikon.class", as that would lead to infinite regress.
-daikon/test/split/SplitterFactoryTestUpdater.class: daikon/test/split/SplitterFactoryTestUpdater.java
+# The updater uses Daikon's classes, so it must be compiled after Daikon; this order-only
+# prerequisite also orders the SplitterFactoryTest rules after Daikon, even under "make -j".
+daikon/test/split/SplitterFactoryTestUpdater.class: daikon/test/split/SplitterFactoryTestUpdater.java | daikon/Daikon.class
 	${JAVAC_COMMAND} $<
 
 ## First, a file not generated via java-cpp.
@@ -1488,7 +1489,8 @@ daikon/test/split/SplitterFactoryTest.java: daikon/Daikon.class \
 	  || ${JAVA_COMMAND} daikon.test.split.SplitterFactoryTestUpdater ${SPLITTER_UPDATER_ARGS}
 	chmod a-w $@
 
-${AUTO_GENERATED_CLASSES_2}: ${AUTO_GENERATED_FILES_2}
+# SplitterFactoryTest calls Daikon's methods, so recompile it when Daikon changes.
+${AUTO_GENERATED_CLASSES_2}: ${AUTO_GENERATED_FILES_2} daikon/Daikon.class
 	${JAVAC_COMMAND} ${AUTO_GENERATED_FILES_2}
 
 # Overwrites SplitterFactoryTest's goal files with the current SplitterFactory output.