CROSS_COMPILE ?=

TARGET_FILE ?= test

CC = $(CROSS_COMPILE)gcc

SRC_DIR = src
OBJ_DIR = obj
BIN_DIR = bin

C_FLAGS := -O0 -g -Iinc

C_SRCS = $(wildcard $(SRC_DIR)/*.c)
C_OBJS = $(patsubst %.c,$(OBJ_DIR)/%.o,$(notdir $(C_SRCS)))

OBJS = $(C_OBJS)

TARGET = $(BIN_DIR)/$(TARGET_FILE)

.PHONY: all
all: $(TARGET)

$(TARGET): $(OBJS)
	@mkdir -p $(BIN_DIR)
	$(CC) $(LD_FLAGS) $(OBJS) $(LIBS) -o $@

.PRECIOUS: $(OBJ_DIR)/%.d
$(OBJ_DIR)/%.d:
	@mkdir -p $(OBJ_DIR)
	$(CC) -MM -MF $@ -MP -MT $(patsubst %.d,%.o,$@) $(C_FLAGS) $(filter %$(patsubst %.d,%.c,$(notdir $@)),$(C_SRCS))

$(OBJ_DIR)/%.o: $(SRC_DIR)/%.c $(OBJ_DIR)/%.d
	@mkdir -p $(OBJ_DIR)
	$(CC) -c $(C_FLAGS) $< -o $@

.PHONY: clean
clean:
	rm -rf $(OBJS) $(patsubst %.o,%.d,$(OBJS)) $(TARGET)

ifneq ($(MAKECMDGOALS),clean)
-include $(patsubst %.o,%.d,$(OBJS))
endif