WebServer/common.mk at master · Noyce765103/WebServer · GitHub

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#最重要最核心的编译脚本，定义makefile的编译规则，依赖规则等，通用性很强的一个脚本，并且各个子目录中都用到这个脚本文件

ifeq ($(DEBUG),true)
CC = g++ -g
VERSION = debug
else
CC = g++
VERSION = release
endif

SRCS = $(wildcard *.cxx)
OBJS = $(SRCS:.cxx=.o)
DEPS = $(SRCS:.cxx=.d)

BIN := $(addprefix $(BUILD_ROOT)/,$(BIN))

LINK_OBJ_DIR = $(BUILD_ROOT)/app/link_obj
DEP_DIR = $(BUILD_ROOT)/app/dep

$(shell mkdir -p $(LINK_OBJ_DIR))
$(shell mkdir -p $(DEP_DIR))

OBJS := $(addprefix $(LINK_OBJ_DIR)/, $(OBJS))
DEPS := $(addprefix $(DEP_DIR)/, $(DEPS))

LINK_OBJ = $(wildcard $(LINK_OBJ_DIR)/*.o)
LINK_OBJ += $(OBJS)


alls:$(DEPS) $(OBJS) $(BIN)

ifneq ("$(wildcard $(DEPS))", "")
include $(DEPS)
endif

$(BIN):$(LINK_OBJ)
	@echo "---------------------------------------------build $(VERSION)---------------------------------------------"
	$(CC) -o $@ $^


$(LINK_OBJ_DIR)/%.o:%.cxx
	$(CC) -I$(INCLUDE_PATH) -o $@ -c $(filter %.cxx, $^)

$(DEP_DIR)/%.d:%.cxx
	echo -n $(LINK_OBJ_DIR)/ > $@
	gcc -I$(INCLUDE_PATH) -MM $^ >> $@