get back ccache support

etc/docker-entrypoint.sh

@@ -17,4 +17,6 @@ ln -s /kaleidoscope/hardware/keyboardio/virtual/libraries/Kaleidoscope \
 
 cd /kaleidoscope/hardware/keyboardio/avr/libraries/Kaleidoscope
 export ARDUINO_DIRECTORIES_DATA=/arduino-cli/data
+export KALEIDOSCOPE_CCACHE=1
+
 /bin/bash -c "$*"

etc/makefiles/arduino-cli.mk

@@ -61,6 +61,10 @@ _arduino_prop = $(subst $1=,,$(subst 🔥, ,$(filter $1=%,$(_arduino_props))))
 # How to use_arduino_prop
 # $(call _arduino_prop,recipe.hooks.sketch.prebuild.2.pattern)
 
+ifneq ($(KALEIDOSCOPE_CCACHE),) 
+ccache_wrapper_property := --build-properties "compiler.wrapper.cmd=ccache"
+endif
+
 .PHONY: configure-arduino-cli install-arduino-core-kaleidoscope install-arduino-core-avr
 
 non-goal: 

etc/makefiles/sketch.mk

@@ -134,7 +134,7 @@ compile:
 		--output-dir "${OUTPUT_PATH}" \
 		--build-cache-path "${CORE_CACHE_PATH}" \
 		--build-properties "compiler.cpp.extra_flags=${LOCAL_CFLAGS}" \
-		--warnings all ${ARDUINO_VERBOSE} \
+		--warnings all ${ARDUINO_VERBOSE} ${ccache_wrapper_property} \
 		"${SKETCH_FILE_PATH}"
 ifeq ($(LIBONLY),)
 	@cp "${BUILD_PATH}/${SKETCH_FILE_NAME}.hex" "${HEX_FILE_PATH}"

testing/makefiles/libcommon.mk

@@ -13,6 +13,11 @@ BARE_CXX_FILES := $(foreach path,${CXX_FILES},$(notdir ${path}))
 OBJ_FILES	:= $(patsubst %.cpp,${OBJ_DIR}/%.o,$(BARE_CXX_FILES))
 LIB_FILE	:= libcommon.a
 
+ifneq ($(KALEIDOSCOPE_CCACHE),)
+COMPILER_WRAPPER := ccache
+endif
+
+
 .PHONY: all
 
 DEFAULT_GOAL: all
@@ -26,7 +31,7 @@ ${LIB_DIR}/${LIB_FILE}: ${OBJ_FILES}
 ${OBJ_DIR}/%.o: ${top_dir}/testing/%.cpp ${H_FILES}
 	$(info compile $@)
 	@install -d "${OBJ_DIR}"
-	g++ -o "$@" -c \
+	$(COMPILER_WRAPPER) g++ -o "$@" -c \
 	  -std=c++14 \
 		-I${top_dir} \
 		-I${top_dir}/src \

testing/makefiles/testcase.mk

@@ -12,6 +12,10 @@ COMMON_LIB_DIR	:= ${top_dir}/_build/lib
 
 include $(top_dir)/etc/makefiles/arduino-cli.mk
 
+ifneq ($(KALEIDOSCOPE_CCACHE),)
+COMPILER_WRAPPER := ccache
+endif
+
 
 SRC_DIR	:= test
 
@@ -57,7 +61,7 @@ compile-sketch:
 		OUTPUT_PATH="${LIB_DIR}" \
 		VERBOSE=${VERBOSE} \
 		$(MAKE) -f ${top_dir}/testing/makefiles/delegate.mk compile
-	$(call _arduino_prop,compiler.cpp.cmd) -o "${BIN_DIR}/${BIN_FILE}" \
+	$(CCACHE) $(call _arduino_prop,compiler.cpp.cmd) -o "${BIN_DIR}/${BIN_FILE}" \
 		-lpthread \
 		-g \
 		-w \
@@ -89,7 +93,7 @@ endif
 ${OBJ_DIR}/%.o: ${SRC_DIR}/%.cpp
 	@echo "compile $@"
 	install -d "${OBJ_DIR}"
-	 $(call _arduino_prop,compiler.cpp.cmd) -o "$@" -c \
+	$(CCACHE) $(call _arduino_prop,compiler.cpp.cmd) -o "$@" -c \
 	  -std=c++14 \
 		-I${top_dir} \
 		-I${top_dir}/src \