Minor improvement to the test build system.

Signed-off-by: Eric Paniagua <epaniagua@google.com>

testing/Makefile

@@ -1,25 +1,26 @@
-LIB_DIR?=${PWD}/lib
-TEST_DIRS=$(dir $(wildcard */*_test.cpp))
+COMMON_LIB_DIR?=${PWD}/lib
+TEST_DIRS=$(shell dirname $(wildcard */Makefile))
 
-Makefile: build-libs ${TEST_DIRS}
-	@:
-
-build-libs: googletest common
-	@:
+Makefile: ${TEST_DIRS} FORCE
+	@echo TEST_DIRS="${TEST_DIRS}"
 
 googletest: FORCE
 	cd googletest && $(MAKE)
 
 common: FORCE
-	cd common && env LIB_DIR="${LIB_DIR}" $(MAKE)
+	cd common && env COMMON_LIB_DIR="${COMMON_LIB_DIR}" $(MAKE)
 
-clean: FORCE
-	rm -rf "${LIB_DIR}"
+clean:
+	rm -rf "${COMMON_LIB_DIR}"
+	cd googletest && make clean
 	cd common && make clean
 	cd hello-simulator && make clean
 	cd kaleidoscope && make clean
 
-%: common googltest FORCE
-	if [ -f "$@/Makefile" ]; then cd "$@"; $(MAKE); fi
+hello-simulator:
+	@:
+
+%: common googletest FORCE
+	cd "$@" && $(MAKE)
 
 .PHONY: FORCE googletest build-libs

testing/common/Makefile

@@ -1,17 +1,16 @@
-LIB_DIR ?= ${PWD}/lib
+COMMON_LIB_DIR ?= ${PWD}/lib
 OBJ_DIR ?= ${PWD}/obj
 
-
 CXX_FILES=$(wildcard *.cpp)
 LIB_FILE=libcommon.a
 OBJ_FILES=$(patsubst %.cpp,${OBJ_DIR}/%.o,$(CXX_FILES))
 
-Makefile: ${OBJ_FILES} ${LIB_DIR}/${LIB_FILE}
+Makefile: ${OBJ_FILES} ${COMMON_LIB_DIR}/${LIB_FILE}
 	@:
 
-${LIB_DIR}/${LIB_FILE}: ${OBJ_FILES}
-	mkdir -p "${LIB_DIR}"
-	ar rcs "${LIB_DIR}/${LIB_FILE}" ${OBJ_FILES}
+${COMMON_LIB_DIR}/${LIB_FILE}: ${OBJ_FILES}
+	mkdir -p "${COMMON_LIB_DIR}"
+	ar rcs "${COMMON_LIB_DIR}/${LIB_FILE}" ${OBJ_FILES}
 
 ${OBJ_DIR}/%.o: %.cpp $(wildcard *.h)
 	@echo "compile $@"
@@ -36,4 +35,4 @@ ${OBJ_DIR}/%.o: %.cpp $(wildcard *.h)
 		$<
 
 clean:
-	rm -rf "${LIB_DIR}" "${OBJ_DIR}"
+	rm -rf "${COMMON_LIB_DIR}" "${OBJ_DIR}"

testing/hello-simulator/Makefile

@@ -23,13 +23,13 @@ ${OBJ_DIR}/%.o: %.cpp
 	@echo "compile $@"
 	mkdir -p "${OBJ_DIR}"
 	g++ -o "$@" -c \
-		-I../.. \
-		-I../../src \
-		-I../../../../../virtual/cores/arduino \
-		-I../../../Kaleidoscope-HIDAdaptor-KeyboardioHID/src \
-		-I../../../KeyboardioHID/src \
-		-I../../testing/googletest/googlemock/include \
-		-I../../testing/googletest/googletest/include \
+		-I${PWD}/../.. \
+		-I${PWD}/../../src \
+		-I${PWD}/../../../../../virtual/cores/arduino \
+		-I${PWD}/../../../Kaleidoscope-HIDAdaptor-KeyboardioHID/src \
+		-I${PWD}/../../../KeyboardioHID/src \
+		-I${PWD}/../../testing/googletest/googlemock/include \
+		-I${PWD}/../../testing/googletest/googletest/include \
 		-DARDUINO=10607 \
 		-DARDUINO_ARCH_VIRTUAL \
 		-DARDUINO_AVR_MODEL01 \
@@ -41,7 +41,7 @@ ${OBJ_DIR}/%.o: %.cpp
 		'-DUSB_PRODUCT="Model 01"' \
 		$<
 
-clean: FORCE
+clean:
 	rm -rf "${BIN_DIR}" "${LIB_DIR}" "${OBJ_DIR}"
 
 .PHONY: FORCE

testing/kaleidoscope/Makefile

@@ -1,4 +1,5 @@
 BIN_DIR=bin
+COMMON_LIB_DIR ?= ${PWD}/../lib
 LIB_DIR=lib
 OBJ_DIR=obj
 SRC_DIR=test
@@ -23,7 +24,7 @@ ${BIN_DIR}/${BIN_FILE}: ${TEST_OBJS} FORCE
 		-g \
 		-w \
 		${TEST_OBJS} \
-		-L"${PWD}/../lib" \
+		-L"${COMMON_LIB_DIR}" \
 		-lcommon \
 		"${LIB_DIR}/${LIB_FILE}" \
 		-L"$(PWD)/../googletest/lib" \