'make clean' fixes

Makefile

@@ -71,6 +71,10 @@ endif
 
 include $(BOARD_HARDWARE_PATH)/$(KALEIDOSCOPE_PLUGIN_MAKEFILE_DIR)/rules.mk
 
+clean:
+	$(MAKE) -C tests clean
+	rm -rf testing/googletest/build/*
+
 
 prepare-virtual:
 	$(MAKE) -C $(BOARD_HARDWARE_PATH)/keyboardio prepare-virtual

tests/Makefile

@@ -15,17 +15,21 @@ all: ${TESTS}
 	done
 
 cmake-clean:
-	-${MAKE} clean
+	rm -rf "${top_dir}/testing/googletest/build/*"
-	rm -rf ../testing/googletest/build
 
-clean: ../testing/googletest/build/Makefile
+clean: cmake-clean
-	rm -rf "${build_dir}"
+# ${top_dir}/testing/googletest/build/Makefile
+	@for test in ${TESTS}; do \
+		${MAKE} -s -f ${top_dir}/testing/makefiles/testcase.mk -C $${test} top_dir=${top_dir} testcase=$${test} clean; \
+	done
+
+	rm -rf "${build_dir}/*"
 
-googletest: ../testing/googletest/build/Makefile
+googletest: ${top_dir}/testing/googletest/build/Makefile
-	cd ../testing/googletest/build && $(MAKE)
+	cd ${top_dir}/testing/googletest/build && $(MAKE)
 
-../testing/googletest/build/Makefile:
+${top_dir}/testing/googletest/build/Makefile:
-	install -d ../testing/googletest/build && cd ../testing/googletest/build && cmake ..
+	install -d ${top_dir}/testing/googletest/build && cd ${top_dir}/testing/googletest/build && cmake ..
 
 ${libcommon_a}:
 	${MAKE} -f ${top_dir}/testing/makefiles/libcommon.mk -C ${top_dir}/testing