嵌入式项目Makefile设计的一般方法

　　本文以视频会议项目为背景，讨论如何使用WindRiver Tornado2.2的GNU工具链中的make工具编译各个模块的源代码，为嵌入式项目创建Makefile提供一般的设计方法。

具体方法如下：
１．先为所有模块，如下图中的code/source/appl目录下dp_new、gc、mc等编写一个全局的Makefile,取名为Makefile.global,放在code/include中。这个全局ＭＡＫＥＦＩＬＥ用于指明工具链、各个子模块的相对路径、obj文件存放的位置，要引用的头文件和库文件目录等。
２．为各个模块如dp_new,gc,mc等编写子Makefile。在这些子Makefile使用include引用Makefile.global并指明要编译的源文件和编译规则已经最终要生成的目标，这里以gc模块为例，来说明如何书写便宜规则！


# Description:Global makefile for sub-modules


# Author:http://blog.sina.com.cn/embeddedsoft


http://blog.csdn.net/embeddedsoft





#here define CPU type, compiler tools faimly, compile rule


CPU = PPC603


TOOL = gnu


TOOL_FAMILY = gnu


DEFAULT_RULE = vxWorks




AR = arppc


AS = ccppc


BOOT_EXTRA =


CC = ccppc


CPPC = c++ppc




# Modify path when the path of source code was changed


WIND_CODE_BASE = E:/cvsroot2/MCU500/code




WIND_PROJECT_BASE = $(WIND_CODE_BASE)/build


WIND_SOURCE_BASE = $(WIND_CODE_BASE)/source




PRJ_ROOT_DIR = $(WIND_PROJECT_BASE)


SRC_ROOT_DIR = $(WIND_SOURCE_BASE)


INC_ROOT_DIR = $(WIND_CODE_BASE)/include


LIB_ROOT_DIR = $(WIND_CODE_BASE)/lib




# target and bsp module


TARGET_DIR = $(WIND_BASE)/target


TARGET_INCLUDE_DIR = $(TARGET_DIR)/h


TARGET_COMPS_SRC_DIR = $(TARGET_DIR)/config/comps/src


TARGET_DRV_SRC_DIR = $(TARGET_DIR)/src/drv




BSP_DIR = $(SRC_ROOT_DIR)/bsp/nw8260_323




BSP_INCLUDE_DIR = $(BSP_DIR)/nwh




# MainCtrl module


MC_DIR = $(SRC_ROOT_DIR)/appl/mc


MC_INCLUDE_DIR = $(MC_DIR)/include


MC_SOURCE_DIR = $(MC_DIR)/source




# Console module


CONSOLE_DIR = $(SRC_ROOT_DIR)/appl/ui/console


CONSOLE_INCLUDE_DIR = $(CONSOLE_DIR)/include


CONSOLE_SOURCE_DIR = $(CONSOLE_DIR)/source




# rs module


RS_DIR = $(SRC_ROOT_DIR)/appl/ui/rs


RS_INCLUDE_DIR = $(RS_DIR)/include


RS_SOURCE_DIR = $(RS_DIR)/source




# Comm module


COMM_DIR = $(SRC_ROOT_DIR)/base/comm_new


COMM_INCLUDE_DIR = $(COMM_DIR)/include


COMM_SOURCE_DIR = $(COMM_DIR)/source




# stack module


STACK_DIR = $(SRC_ROOT_DIR)/appl/stack




# DataProcess module


DP_DIR = $(SRC_ROOT_DIR)/appl/dp_new


DP_INCLUDE_DIR = $(DP_DIR)/include


DP_SOURCE_DIR = $(DP_DIR)/source




#web module


EWSMCU_INCLUDE_DIR = $(SRC_ROOT_DIR)/appl/ui/web/EWS_MCU/include


EWSMCU_SOURCE_DIR = $(SRC_ROOT_DIR)/appl/ui/web/EWS_MCU/source




# common module


COMMON_DIR = $(SRC_ROOT_DIR)/base/common






# application


PRJ_DIR = $(PRJ_ROOT_DIR)


OBJ_DIR = $(PRJ_ROOT_DIR)/binary


APP_INCLUDE_DIR = $(WIND_CODE_BASE)/include




CFLAGS = -g


-mcpu=603 -mstrict-align


-ansi -fno-builtin


-DCPU=PPC603


-DTOOL_FAMILY=gnu


-DTOOL=gnu


-DPRJ_BUILD


-D__VXWORKS__


-DCODEC_RTOS


-DVXWORKS


-DUEMF


-DWEBS_PAGE_ROM


-DWEBS


-D__NO_PACK


-DDEVICE_MCU




INCLUDE_DIR = -I$(BSP_DIR)


-I$(BSP_INCLUDE_DIR)


-I$(INC_ROOT_DIR)


-I$(TARGET_INCLUDE_DIR)


-I$(BSP_INCLUDE_DIR)


-I$(TARGET_DRV_SRC_DIR)


-I$(PRJ_DIR)


-I$(OBJ_DIR)


-I$(MC_DIR)


-I$(MC_INCLUDE_DIR)


-I$(MC_SOURCE_DIR)


-I$(DP_DIR)


-I$(DP_INCLUDE_DIR)


-I$(DP_SOURCE_DIR)


-I$(CONSOLE_DIR)


-I$(CONSOLE_INCLUDE_DIR)


-I$(CONSOLE_SOURCE_DIR)


-I$(EWSMCU_INCLUDE_DIR)


-I$(EWSMCU_SOURCE_DIR)


-I$(COMM_INCLUDE_DIR)


-I$(COMM_SOURCE_DIR)


-I$(RS_INCLUDE_DIR)


-I$(RS_SOURCE_DIR)






CFLAGS += $(INCLUDE_DIR)




MAKE = $(WIND_BASE)/host/x86-win32/bin/make


RM = rm


CP = $(WIND_BASE)/host/x86-win32/bin/cp






# Description:Makefile used to build GC module


# Author:http://blog.sina.com.cn/embeddedsoft


http://blog.csdn.net/embeddedsoft



include ../../../include/Makefile.global





APP_GC = $(LIB_ROOT_DIR)/gc.a




SRCS = gcaddrbook.c


gccallhistory.c


gccapacity.c


gcconftemplate.c


gcdevice.c


gcendpointinfo.c


gcgateway.c


gcgk.c


gcglobal.c


gcmulticast.c


gcnet.c


gcresethistory.c


gcrs.c


gcupdate.c


gcweb.c




OBJS2 := $(SRCS:.c=.o)


OBJS := $(addprefix $(OBJ_DIR)/,$(OBJS2))




$(APP_GC):$(OBJS)


$(RM) -f $(APP_GC)


$(AR) -r $(APP_GC) $(OBJS)





$(OBJ_DIR)/%.o: %.c


$(CC) -c -o $@ $(CFLAGS) $<


clean:


$(RM) $(APP_GC) $(OBJS)