CXX := g++
CPP_STD := 17
CPP = c++
PRJ_NAME = run
PRJ_HEADERS_DIR := $(CURDIR)/headers
SRC_DIR := $(CURDIR)/src
CXX_FLAGS := -Wall -I$(PRJ_HEADERS_DIR) -std=$(CPP)$(CPP_STD) -g
LDFLAGS =
OUTPUT_DIR := $(CURDIR)/output
BUILD_DIR := $(CURDIR)/build

SRCS := $(wildcard $(SRC_DIR)/*.cc)

OBJS := $(patsubst $(SRC_DIR)/%.cc, $(BUILD_DIR)/%.o, $(wildcard $(SRC_DIR)/*.cc))

TARGET = $(OUTPUT_DIR)/$(PRJ_NAME)

all: $(TARGET)

$(TARGET): $(OBJS)
	$(CXX) -o $@ $^ $(LDFLAGS)

$(BUILD_DIR)/%.o: $(SRC_DIR)/%.cc
	$(CXX) $(CXX_FLAGS) -c $< -o $@

run: all
	@echo "----start exec project------"
	@$(TARGET)
clean:
	@rm -f $(OBJS) $(TARGET)

full_clean:
	@rm -rf $(BUILD_DIR)/* && rm -rf $(OUTPUT_DIR)/*

.PHONY: all clean help

help:
	@echo "usage as follows:\n"\
	"make all\t--> compiler all and run\n"\
	"make run\t--> make and run\n"\
	"make clean\t--> make clean the compiling stuff\n"\
	"make full_clean\t--> rm all make related files\n"