BCM VOIP 应用程序编译分析

男娘i 2022-08-27 11:51 253阅读 0赞

# VOIP应用程序源码分布： #

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1.  Vodsl(VOIP应用程序) -- userspace/private/apps/vodsl  
2.    |\_bos(系统适配层)-- xChange/dslx\_common/xchg\_common  
3.    |\_endpoint(驱动适配层)-- userspace/private/apps/vodsl/endpoint  
4.    |\_voip(主程序)  
5.    |\_prov(配置、调试接口及sip程序main)--userspace/private/apps/vodsl/voip/prov  
6.    |\_pstn(FXO相关业务)--userspace/private/apps/vodsl/voip/pstn  
7.    |\_rtp(RTP相关处理)--userspace/private/apps/vodsl/voip/rtp  
8.    |\_util(辅助模块，如防火墙控制、日志等)--userspace/private/apps/vodsl/voip/util  
9.    |\_sip(sip协议产品目录)--userspace/private/apps/vodsl/voip/sip  
10.       |\_codec(编码列表相关)-- xChange/dslx\_common/voice\_res\_gw/codec  
11.       |\_callctrl(MT5协议栈适配层)—  
12. xChange/dslx\_common/prot\_callctrl/stacks/callctrl  
13.       |\_callmgr(呼叫管理模块)-- xChange/dslx\_common/prot\_callctrl/apps/vrg  
14.       |\_sip\_mx(MT5协议栈，无源码，库路径为)—  
15. userspace/private/apps/vodsl/voip/sip/sip\_mx/lib

# VOIP应用程序编译分析： #

**一、根目录Makefile**

all: prebuild\_checksall\_postcheck1

all\_postcheck1:  profile\_saved\_check sanity\_check \\

create\_install kernelbuild modbuild kernelbuildlite \\

userspace  gdbserver vodsl dectd hosttools buildimage

vodsl: sanity\_check

//这里BUILD\_VODSL在profile里定义为BUILD\_VODSL=dynamic

$(MAKE) -C $(BUILD\_DIR)/userspace/private/apps/vodsl $(BUILD\_VODSL)

**二、userspace/private/apps/vodsl的Makefile**

dynamic: $(PROGRAM\_NAME) install dectfwucp

$(PROGRAM\_NAME):subdirs $(OBJS)

……   //这里依赖SUBDIRS各子目录的.o目标文件生成vodsl主程序

OBJS = $(foreach obj,$(SUBDIRS),$(obj)/$(obj).o)

subdirs: $(patsubst %, \_dir\_%, $(SUBDIRS))

//这里TGT为空

//通过profile及make.voice结合，查到目前SUBDIRS包含endpoint  bos  voip

$(patsubst %, \_dir\_%, $(SUBDIRS)) :

$(MAKE) -C $(patsubst \_dir\_%, %, $@) $(TGT)

**三、userspace/private/apps/vodsl/endpoint的Makefile**

endpoint.o: $(OBJS)

……    //生成endpoint.o

OBJS =  endpoint\_user.o endpoint\_test.o

**四、userspace/private/apps/vodsl/bos的Makefile**

bos.o:  $(BOSLIBS\_SUBDIR)/\*.o $(LIB) generic\_private\_lib\_install

BOSLIBS\_SUBDIR  =  lib

$(BOSLIBS\_SUBDIR)/\*.o:

//切换到xChange/dslx目录

cd $(XCHANGE\_DIR)/dslx;

//使用build脚本生成bos库涉及到的.a静态库,build脚本下面单独分析

//通过查看  make.voice和profile，各环境变量如下：

//XCHANGE\_BUILD\_APP = Bcm6828uni

//XCHANGE\_DSP\_APP = all

// XCHANGE\_DSP\_APP\_EXTENSION = 空

$(XCHANGE\_DIR)/dslx/build \-a $(XCHANGE\_BUILD\_APP)

\-d $(XCHANGE\_DSP\_APP)$(XCHANGE\_DSP\_APP\_EXTENSION)

\-t bosu $(XCHANGE\_BUILD\_EXTRA\_CFLAGS);

mkdir -p $(CURDIR)/$(BOSLIBS\_SUBDIR)

//将上面build脚本生成的静态库复制到BOSLIBS\_SUBDIR下面

for i   in  $(BOSLIBS); do  \\

cp $(XCHANGE\_DIR)/dslx/lib/LinuxUser/$(XCHANGE\_BUILD\_APP)/xchg/$$i.a$(CURDIR)/$(BOSLIBS\_SUBDIR)/$$i.lib; \\

done; \\

//将BOSLIBS\_SUBDIR下面的静态库全部解压开

cd  $(CURDIR)/$(BOSLIBS\_SUBDIR); \\

for i   in  $(BOSLIBS); do  \\

$(AR)   x $$i.lib;      \\

done;

//将解压后的.o文件重新链接成所需要的目标文件bos.o

$(LD) -G 0 -r $@ -o $(BOSTARGET);

build \-a Bcm6828uni –d all –tbosu 分析

该脚本通过参数解析，最后主要执行如下动作，其中设置如下环境变量：

APPDIR = Bcm6828uni ;

DSPAPP = all

TARGET = bosu

CXC\_OS\_TYPE = LinuxUser

CXC\_LINUX\_ARCHITECTURE = MIPS

BOS\_LIBS = bos sme str

//进入xChange/dslx/apps/Bcm6828uni目录

cd $\{CXC\_PROJ\_DIR\}/dslx/apps/$\{APPDIR\}

//执行该目录下的Makefile，编译目标为xchg\_common

make verbose=$\{VERBOSE\} dspapp=$\{DSPAPP\}  xchg\_common

xChange/dslx/apps/Bcm6828uni下Makefile分析

include cxcApp$(notdir $(CURDIR)).mk //仅仅引用当前目录下的cxcAppBcm6828uni.mk

xChange/dslx/apps/Bcm6828uni下cxcAppBcm6828uni.mk分析

//定义DSP库文件的目录

//引用xChange/dslx/apps/rules/cxcAppRules.mk

include ../rules/cxcAppRules.mk

xChange/dslx/apps/rules下cxcAppRules.mk分析

//后面用到XCHG\_MAKE\_TARGETS环境变量

CXC\_XCHG\_TARGET\_LIST :=assert bos containers sme str trace blog

export XCHG\_MAKE\_TARGETS   := $(CXC\_XCHG\_TARGET\_LIST)

//这里的XCHG\_LIB\_DIR环境变量比较重要,下面编译生成的静态库就输出在这里

//上面引用的静态库也是从这里引用的.

xc xchg\_common:

// XCHG\_ROOT = xChange/dslx\_common/xchg\_common

$(MAKE) -C $(XCHG\_ROOT) -f xchg\_common.mk \\

XCHG\_LIB\_DIR=$(CXC\_BASE\_LIB\_DIR)/$(CXC\_XCHG\_OUTPUT\_DIR)XCHG\_OBJ\_DIR=$(CXC\_BASE\_OBJ\_DIR)/$(CXC\_XCHG\_OUTPUT\_DIR)

xChange/dslx\_common/xchg\_common下xchg\_common.mk分析

//这里引用了$(XCHG\_ROOT)/xchg\_common\_targets.mk，而xchg\_common\_targets.mk里定义

//XCHG\_ALL\_TARGETS环境变量

include $(XCHG\_ROOT)/xchg\_common\_env.mk

XCHG\_VALID\_TARGETS=$(XCHG\_ALL\_TARGETS) $(addprefix clean\_,$(XCHG\_ALL\_TARGETS)) $(addprefix audit\_,$(XCHG\_ALL\_TARGETS))

//这里MAKECMDGOALS为空，所以最终libTargets从XCHG\_MAKE\_TARGETS中取值

ifeq ($(strip $(filter $(MAKECMDGOALS),$\{ XCHG\_VALID\_TARGETS\})),)

libTargets := $(XCHG\_MAKE\_TARGETS)

else

xxx

endif

//这里all的目标定义在xChange/dslx\_common/xchg\_common/rules/xChgRules.mk里

all:

//引用BOS模块编译所需要的各子目录下的Makefile，其中各子目录下的Makefile定义了

//各自关键的XCHG\_LIB\_BASE   XCHG\_SRC\_FILES环境变量

XCHG\_MODULE\_MAKEFILES :=

$(foreach target,$(libTargets),$(XCHG\_DIR\_$(target))/$(target).mk)

include $(XCHG\_MODULE\_MAKEFILES)

include $(XCHG\_ROOT)/rules/xChgRules.mk

//xChgRules.mk里定义的all为

all:target

//当前XCHG\_MAKE\_TARGETS环境变量值上从上面引用过来的,当前该值为

//assert bos containers sme str trace blog

//这里target的依赖规则都是从下面的XCHG\_ARCHIVE\_TEMPLATE功能宏中定义

target: $(XCHG\_MAKE\_TARGETS)

//调用功能宏XCHG\_ARCHIVE\_TEMPLATE,该功能宏定义在

//xChange/dslx\_common/xchg\_common/rules/xChgRules.mk中

//该功能宏的传入参数依次为assert bos containers sme str trace blog

$(foreach target,$(libTargets),$(eval $(callXCHG\_ARCHIVE\_TEMPLATE,$(target))))

xChange/dslx\_common/xchg\_common/rules/xChgRules.mk分析

define XCHG\_ARCHIVE\_TEMPLATE

//这里不同模块依赖的目标文件，都是从各模块自身的源文件列表中编译生成

XCHG\_OBJ\_FILES\_$(1) := $(addprefix $(XCHG\_OBJ\_DIR)/, $(addsuffix $(XCHG\_OBJ\_EXT),$(basename $(XCHG\_SRC\_FILES\_$(1)))))

XCHG\_DEP\_FILES\_$(1) := $$(XCHG\_OBJ\_FILES\_$(1):$(XCHG\_OBJ\_EXT)=.d)

XCHG\_PREPROCESSED\_FILES\_$(1) := $(addsuffix .pp,$(basename $(XCHG\_SRC\_FILES\_$(1))))

//该变量内容比较重要，最终生成的各个静态库目标文件就是存储在这里，这里调用了

// XCHG\_MAKE\_LIB\_NAME功能宏，该功能宏定义在

//xChange/dslx\_common/xchg\_common/rules/xChgEnv.mk中，

//注意这里使用了XCHG\_LIB\_DIR，即上面在解压静态库时的路径

//在xChgEnv.mk中定义如下：

//XCHG\_MAKE\_LIB\_NAME =

//$(foreach //libBase,$(1),$(XCHG\_LIB\_DIR)/$(XCHG\_LIB\_PREFIX)$(libBase)$(XCHG\_LIB\_EXT))

XCHG\_LIB\_NAME\_$(1) := $(callXCHG\_MAKE\_LIB\_NAME,$(1))

$(1) : XCHG\_C\_LOCAL\_INCLUDE := $$(XCHG\_C\_LOCAL\_INCLUDE\_$(1))

$(1) : XCHG\_C\_LOCAL\_DEFS := $$(XCHG\_C\_LOCAL\_DEFS\_$(1))

$$(XCHG\_DEP\_FILES\_$(1)) : XCHG\_C\_LOCAL\_INCLUDE := $$(XCHG\_C\_LOCAL\_INCLUDE\_$(1))

$$(XCHG\_DEP\_FILES\_$(1)) : XCHG\_C\_LOCAL\_DEFS := $$(XCHG\_C\_LOCAL\_DEFS\_$(1))

$$(XCHG\_PREPROCESSED\_FILES\_$(1)) : XCHG\_C\_LOCAL\_INCLUDE := $$(XCHG\_C\_LOCAL\_INCLUDE\_$(1))

$$(XCHG\_PREPROCESSED\_FILES\_$(1)) : XCHG\_C\_LOCAL\_DEFS := $$(XCHG\_C\_LOCAL\_DEFS\_$(1))

//这里就是上面$(XCHG\_MAKE\_TARGETS)的所有依赖目标，分别根据各自的源文件，生成对

//应的静态库。

$(1) : $$(XCHG\_LIB\_NAME\_$(1))

$$(XCHG\_LIB\_NAME\_$(1)) : $$(XCHG\_OBJ\_FILES\_$(1))

$(ECHO) 'Creating Archive $$@'

$(MKDIR) -p $$(@D)

$(RM) -f $$@

$(XCHG\_ARCHIVE) $(XCHG\_ARCHIVE\_OPTS)$$@ $$^

$(ECHO)

endef

**五、userspace/private/apps/vodsl/voip的Makefile**

//通过分析make.voice 和 profile，SUBDIRS环境变量的内容如下

SUBDIRS  =  rtp util pstn prov sip

OBJS = $(foreach obj,$(SUBDIRS),$(obj)/$(obj).o)

//能过各子目录的.o文件生成voip.o

voip.o: subdirs $(OBJS)

$(LD) $(EXTRA\_LDFLAGS) -r -o $@ $(OBJS)

//进入到各子目录进行编译

$(patsubst %, \_dir\_%, $(SUBDIRS)) :

$(MAKE) -C $(patsubst \_dir\_%, %, $@) $(TGT)

\-----------------------------------------------------------------------------

**1、userspace/private/apps/vodsl/voip/rtp的Makefile**

OBJS =  rtpapi.o rtcp.o udp.o

rtp.o: $(OBJS)

$(LD) $(EXTRA\_LDFLAGS) -r -o $@ $(OBJS)

**2、userspace/private/apps/vodsl/voip/util的Makefile**

**//通过分析make.voice和profile，SUBDIRS环境变量的内容如下**

SUBDIRS  = net regexp signal qos firewall map log vodslcmslock feature

OBJS = $(foreach obj,$(SUBDIRS),$(obj)/$(obj).o)

util.o: subdirs $(OBJS)

$(LD) $(EXTRA\_LDFLAGS) -r -o $@ $(OBJS)

//分别进入各子目录进行编译，不细分析。

$(patsubst %, \_dir\_%, $(SUBDIRS)) :

$(MAKE) -C $(patsubst \_dir\_%, %, $@) $(TGT)

**3、userspace/private/apps/vodsl/voip/pstn的Makefile**

OBJS = ccMaps.o ccPstn.o

pstn.o: $(OBJS)

$(LD) $(EXTRA\_LDFLAGS) -r -o $@ $(OBJS)

**4、userspace/private/apps/vodsl/voip/prov的Makefile**

//通过分析make.voice和profile，OBJS变量内容如下：

OBJS = endptProv.o endptCmd.o endptProbe.o provisData.o sipCli.o

prov.o: $(OBJS)

$(LD) $(EXTRA\_LDFLAGS) -r -o $@ $(OBJS)

**5、userspace/private/apps/vodsl/voip/sip的Makefile**

//通过分析make.voice和profile，SUBDIRS变量内容如下：

SUBDIRS  = codec callctrl callmgr sip\_mx

OBJS = $(foreach obj,$(SUBDIRS),$(obj)/$(obj).o)

sip.o: subdirs $(OBJS)

$(LD) $(EXTRA\_LDFLAGS) -r -o $@ $(OBJS)

//进入各子目录进行编译

$(patsubst %, \_dir\_%, $(SUBDIRS)) :

$(MAKE) -C $(patsubst \_dir\_%, %, $@) $(TGT)

**5.1、userspace/private/apps/vodsl/voip/sip/codec的Makefile**

CODECTARGET =  codec.o

CODECLIB\_DIR  = $(XCHANGE\_DIR)/dslx/lib/LinuxKernel/$(XCHANGE\_BUILD\_APP)/vrg

CODECLIB = codec.a

%:  force

force:

//使用xChange/dslx/build脚本构造codec模块相关的静态库

cd $(XCHANGE\_DIR)/dslx;

$(XCHANGE\_DIR)/dslx/build \-a $(XCHANGE\_BUILD\_APP)

\-d $(XCHANGE\_DSP\_APP)$(XCHANGE\_DSP\_APP\_EXTENSION) -tcodec $(EXTRA\_CFLAGS);

//将build脚本构建好的静态库复制出来,并解压,然后将解压后的.o文件重新生成最

//终所需要的codec.o目标文件

mkdir -p tmp

cp -f $(CODECLIB\_DIR)/$(CODECLIB) ./tmp/$(CODECTEMP\_TARGET)

cd tmp; $(AR) x $(CODECTEMP\_TARGET)

$(LD) $(EXTRA\_LDFLAGS) -r -o $(CODECTARGET) tmp/\*.o

** **

**----------------------------------------------------------------------------**

build –t codec脚本分析

** **

分析了build脚本,codec的编译非应用层编译,上面需要的静态库是由make modbuild生成

** **

**5.2、userspace/private/apps/vodsl/voip/sip/callctrl的Makefile**

CCTARGET =  callctrl.o

CCLIB\_DIR  = $(XCHANGE\_DIR)/dslx/lib/LinuxUser

CCLIB = libcallctrl.a

%:  force

force:

//使用xChange/dslx/build脚本构造callctrl模块相关的静态库

cd $(XCHANGE\_DIR)/dslx; \\

$(XCHANGE\_DIR)/dslx/build \-a $(XCHANGE\_BUILD\_APP)

\-d $(XCHANGE\_DSP\_APP)$(XCHANGE\_DSP\_APP\_EXTENSION) -tsipcc $(EXTRA\_CFLAGS);

//将build脚本构建好的静态库复制出来,并解压,然后将解压后的.o文件重新生成最

//终所需要的callctrl.o目标文件

mkdir -p tmp

cp -f $(CCLIB\_DIR)/$(CCLIB) ./tmp/$(CCTEMP\_TARGET)

cd tmp;ar x $(CCTEMP\_TARGET)

$(LD) $(EXTRA\_LDFLAGS) -r -o $(CCTARGET) tmp/\*.o

** **

**----------------------------------------------------------------------------**

build –t  sipcc脚本分析

CXC\_OS\_TYPE=LinuxUser

CXC\_LINUX\_ARCHITECTURE=MIPS

** **

//进入xChange/dslx/apps/Bcm6828uni目录

cd $\{CXC\_PROJ\_DIR\}/dslx/apps/$\{APPDIR\}

//执行该目录下的Makefile，目标为callctrl

make verbose=$\{VERBOSE\} dspapp=$\{DSPAPP\}  callctrl

** **

xChange/dslx/apps/Bcm6828uni下cxcAppBcm6828uni.mk分析

//定义DSP库文件的目录

//引用xChange/dslx/apps/rules/cxcAppRules.mk

include ../rules/cxcAppRules.mk

xChange/dslx/apps/rules下cxcAppRules.mk分析

//引用了cxcAppEnv.mk，这时定义了关键的  CXC\_CABLEX\_DIR := $(CXC\_PROJ\_DIR)/dslx

//环境变量，该环境变量最终和下面的XCHG\_LIB\_DIR合成静态库生成的路径，该路径与

//上面要引用的静态库路径相同。

include $(CXC\_PROJ\_DIR)/dslx/apps/rules/cxcAppEnv.mk

callctrl:

//进入xChange/dslx\_common/prot\_callctrl/build/vrg/dslx目录下，执行

// sip\_cc.mk

**   ** $(MAKE) -C $(CXC\_SIP\_CC\_DIR)/build/vrg/dslx -f sip\_cc.mk

** **

xChange/dslx\_common/prot\_callctrl/build/vrg/dslx/sip\_cc.mk分析

** **

XCHG\_LIB\_BASE  := libcallctrl

XCHG\_LIB\_DIR = $(CXC\_CABLEX\_DIR)/lib/$(CXC\_OS\_TYPE)/

XCHG\_OBJ\_DIR = $(CXC\_CABLEX\_DIR)/obj/$(CXC\_OS\_TYPE)/callctrl

** **

//比较重要，在下面调用xChgRules.mk时，xChgRules.mk会判断该宏设置了才进行额外的//默认规则引用

XCHG\_RECURSIVE\_BUILD=1

** **

//引用xChange/dslx\_common/prot\_callctrl/build/vrg/dslx/sources\_sip\_cc.mk

//主要定义了SRCDIR\_SIP\_CC SRCS\_SIP\_CC 两个环境变量，包含callctrl的目录及源

//文件

CALLCTRLLIB\_ROOT    := $(CXC\_SIP\_CC\_DIR)

include $(CALLCTRLLIB\_ROOT)/build/vrg/dslx/sources\_sip\_cc.mk

** **

export CALLCTRL\_SRC = $(SRCS\_SIP\_CC)

//这里可以看到callctrl模块的源码主要集中在

//xChange\\dslx\_common\\prot\_callctrl\\stacks\\callctrl目录中

CALLCTRL\_SRCDIR = $(addprefix $(CALLCTRLLIB\_ROOT)/stacks/callctrl/, $(SRCDIR\_SIP\_CC))

** **

XCHG\_SRC\_FILES := $(CALLCTRL\_SRC)

vpath %.c $(CALLCTRL\_SRCDIR)

//引用xChange/dslx\_common/xchg\_common/rules/xChgRules.mk

include $(XCHG\_RULES\_DIR)/xChgRules.mk

** **

xChange/dslx\_common/xchg\_common/rules/xChgRules.mk分析

** **

all:  target

** **

XCHG\_OBJ\_FILES = $(addprefix $(XCHG\_OBJ\_DIR)/,

$(addsuffix $(XCHG\_OBJ\_EXT),$(basename $(XCHG\_SRC\_FILES))))

** **

//上面已经赋值，才会进行此分支，额外增加引用规则

ifneq ($(XCHG\_LIB\_BASE),)

ifeq ($(XCHG\_RECURSIVE\_BUILD),1)

//这里调用了XCHG\_MAKE\_LIB\_NAME功能宏，该功能宏定义在

//xChange/dslx\_common/xchg\_common/rules/xChgEnv.mk中，最终将引用

//XCHG\_LIB\_DIR环境变量组成生成静态库输出的目录，这个目录也是最上面

//引用静态库的地方。

XCHG\_LIB\_NAME  := $(callXCHG\_MAKE\_LIB\_NAME,$(XCHG\_LIB\_BASE))

lib: $(XCHG\_LIB\_NAME)

target:  lib

//生成最终的静态库目标

$(XCHG\_LIB\_NAME) : $(XCHG\_OBJ\_FILES)

$(ECHO) 'Creating Archive $@'

@$(MKDIR) -p $(@D)

$(RM) -f $@

$(XCHG\_ARCHIVE) $(XCHG\_ARCHIVE\_OPTS)$@ $^

** **

endif

** **

**5.3、userspace/private/apps/vodsl/voip/sip/callmgr的Makefile**

CALLMGRTARGET =  callmgr.o

CALLMGRLIB\_DIR  = $(XCHANGE\_DIR)/dslx/lib/LinuxUser

CALLMGRLIB = libcallmgr.a

%:  force

force:

//使用xChange/dslx/build脚本构造sipcmgrcctrl模块相关的静态库

cd $(XCHANGE\_DIR)/dslx;                 \\

$(XCHANGE\_DIR)/dslx/build \-a $(XCHANGE\_BUILD\_APP)

\-d $(XCHANGE\_DSP\_APP)$(XCHANGE\_DSP\_APP\_EXTENSION)

\-t sipcmgrcctrl $(EXTRA\_BUILD\_FLAGS) -D IP\_SIP -D $(SIP\_ALG\_BUILD\_FLAGS);

//将build脚本构建好的静态库复制出来,并解压,然后将解压后的.o文件重新生成最

//终所需要的callmgr.o目标文件

mkdir -p tmp

cp -f $(CALLMGRLIB\_DIR)/$(CALLMGRLIB) ./tmp/$(CALLMGRTEMP\_TARGET)

cd tmp; $(AR) x $(CALLMGRTEMP\_TARGET)

$(LD) $(EXTRA\_LDFLAGS) -r -o $(CALLMGRTARGET) tmp/\*.o

** **

**-----------------------------------------------------------------------------**

build –t sipcmgrcctrl脚本分析

** **

CXC\_OS\_TYPE=LinuxUser

CXC\_LINUX\_ARCHITECTURE=MIPS

//进入xChange/dslx/apps/Bcm6828uni目录，执行该目录下的Makefile，目标为callmgr

cd $\{CXC\_PROJ\_DIR\}/dslx/apps/$\{APPDIR\}

make verbose=$\{VERBOSE\} dspapp=$\{DSPAPP\}  callmgr

** **

**------------------------------------------------------------------------------**

xChange/dslx/apps/Bcm6828uni下cxcAppBcm6828uni.mk分析

//定义DSP库文件的目录

//引用xChange/dslx/apps/rules/cxcAppRules.mk

include ../rules/cxcAppRules.mk

xChange/dslx/apps/rules下cxcAppRules.mk分析

** **

//进入xChange/dslx\_common/prot\_callctrl/build/vrg/dslx目录下，执行sip\_cmgr.mk

callmgr:

$(MAKE) -C $(CXC\_SIP\_CMGR\_DIR)/build/vrg/dslx -f sip\_cmgr.mk

** **

xChange/dslx\_common/prot\_callctrl/build/vrg/dslx/sip\_cmgr.mk分析

** **

XCHG\_LIB\_BASE  := libcallmgr

XCHG\_LIB\_DIR = $(CXC\_CABLEX\_DIR)/lib/$(CXC\_OS\_TYPE)/

XCHG\_OBJ\_DIR = $(CXC\_CABLEX\_DIR)/obj/$(CXC\_OS\_TYPE)/callmgr

** **

//比较重要，在下面调用xChgRules.mk时，xChgRules.mk会判断该宏设置了才进行额外的//默认规则引用

XCHG\_RECURSIVE\_BUILD=1

** **

//引用xChange/dslx\_common/prot\_callctrl/build/vrg/dslx/ sources\_sip\_cmgr.mk

//主要定义了SRCDIR\_SIP\_CMGR SRCS\_SIP\_CMGR 两个环境变量，包含callmgr的目录及源

//文件

include $(CALLMGRLIB\_ROOT)/build/vrg/dslx/sources\_sip\_cmgr.mk

** **

export CALLMGR\_SRC = $(SRCS\_SIP\_CMGR)

export CALLMGR\_SRCDIR = $(addprefix $(CALLMGRLIB\_ROOT)/apps/vrg/, $(SRCDIR\_SIP\_CMGR))

** **

XCHG\_SRC\_FILES := $(CALLMGR\_SRC)

vpath %.c $(CALLMGR\_SRCDIR)

** **

//引用xChange/dslx\_common/xchg\_common/rules/xChgRules.mk

include $(XCHG\_RULES\_DIR)/xChgRules.mk

** **

\-----------------------------------------------------------------------------

xChange/dslx\_common/xchg\_common/rules/xChgRules.mk分析

** **

all:  target

XCHG\_OBJ\_FILES = $(addprefix $(XCHG\_OBJ\_DIR)/, $(addsuffix $(XCHG\_OBJ\_EXT),$(basename $(XCHG\_SRC\_FILES))))

//上面已经赋值，才会进行此分支，额外增加引用规则

ifneq ($(XCHG\_LIB\_BASE),)

ifeq ($(XCHG\_RECURSIVE\_BUILD),1)

//这里调用了XCHG\_MAKE\_LIB\_NAME功能宏，该功能宏定义在

// xChange/dslx\_common/xchg\_common/rules/xChgEnv.mk中，最终将引用

// XCHG\_LIB\_DIR环境变量组成生成静态库输出的目录，这个目录也是最上面

//引用静态库的地方。

XCHG\_LIB\_NAME  := $(callXCHG\_MAKE\_LIB\_NAME,$(XCHG\_LIB\_BASE))

lib: $(XCHG\_LIB\_NAME)

target:  lib

//生成最终的静态库目标

$(XCHG\_LIB\_NAME) : $(XCHG\_OBJ\_FILES)

$(ECHO) 'Creating Archive $@'

@$(MKDIR) -p $(@D)

$(RM) -f $@

$(XCHG\_ARCHIVE) $(XCHG\_ARCHIVE\_OPTS)$@ $^

endif

** **

**5.4、userspace/private/apps/vodsl/voip/sip/sip\_mx的Makefile**

SIPTARGET = sip\_mx.o

SIPSRC\_DIR = $(XCHANGE\_DIR)/dslx\_common/prot\_callctrl/stacks/sip\_mx

SIPLIB = libsip\_mx.a

%:  force

force:

//查找是否含有协议栈源码文件，当前项目没有MT5协议栈原码，所以不进此分支

@rm -f $(TMPFILE);

@find $(SIPSRC\_DIR) -name '\*.cpp' > $(TMPFILE)

@if \[ -s $(TMPFILE) \];then

……

//直接复制方案商提供的静态库

//CURDIR = userspace/private/apps/vodsl/voip/sip/sip\_mx

cp -f $(CURDIR)/lib/$(SIPLIB) $(CURDIR)/$(SIPTARGET)

转自：http://blog.csdn.net/liujianfeng1984/article/details/16994603

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