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makefile示例
1. 生成.so动态库
示例一:
SoVer = 10010110
CfgVer = 10010110BinName = fnights.so
GameName = "\"fnights\""
GameID = 100BIN = $(BinName).$(SoVer)
all: clean compilerelease
clean:
rm -f $(BIN) *.ocompilerelease:
g++ -fPIC -O -shared -DNDEBUG -Wall -g -D_GAME_ID=$(GameID) -D_GAME_NAME=$(GameName) -D_CFG_VERSION=$(CfgVer) -o $(BIN) ./*.cpp
注:-fPIC:编译为位置独立的代码,so带上该选项以达到代码段共享的目的;-shared:编译为动态连接库
-D:定义预编译值;-O:表示启用优化;-Wall:打印出gcc提供的警告信息;-o:指定输出的目标文件名
示例二:
CPP = g++
SRCPATH = $(CURDIR)SRCINCLUDE = $(SRCPATH)/Include/ServerFrame/
LIBSRCINCLUDE = $(SRCPATH)/Include/BaseLib/
COMMONDEF = $(SRCPATH)/Include/CommonDef/
PUBLIC_INC = ${HOME}/project/public/include/INCLUDE = -I $(PUBLIC_INC) -I $(SRCINCLUDE) -I $(LIBSRCINCLUDE) -I $(COMMONDEF)
ALLLIBSPATH = -L$(SRCPATH)/Include/LibStatic/ -L/usr/local/lib -L${HOME}/project/public/lib -L$(SRCPATH)/Include/Lib/
SLIBS= -lbase
DLIBS= -lGameServerC_ARGS = -g -Wall -rdynamic -D_DEBUG_ -D_POSIX_MT_ -D_FILE_OFFSET_BITS=64 -fstack-protector-all $(INCLUDE) -fPIC -O2
VERSION_STR = +++ This is a DEBUG Lib!! +++
BINARY = libGame.so
SUBDIR = Msg
SUBSRC=http://www.mamicode.com/$(shell find $(SUBDIR) -name ‘*.cpp‘)
SUBOBJ=$(SUBSRC:%.cpp=%.o)
SO_OBJS = $(patsubst %.cpp,%.o,$(wildcard *.cpp)) $(patsubst %.c,%.o,$(wildcard *.c))
SOOBJS = $(SO_OBJS) $(SUBOBJ)%.o : %.cpp
$(CPP) $(C_ARGS) -c $< -o $@
%.o : %.c
$(CPP) $(C_ARGS) -c $< -o $@
all : clean $(BINARY)$(BINARY) : $(SOOBJS)
rm -f $@
$(CPP) $(C_ARGS) -o $@ $(SOOBJS) $(ALLLIBSPATH) -Wl,-Bstatic $(SLIBS) -Wl,-Bdynamic $(DLIBS) -fPIC -shared
@echo
@echo $(VERSION_STR)
@echoclean:
rm -f $(SOOBJS)
注:-I:指定文件查找路径;-L:链接外部静态库与动态库的查找路径;
-l:指定动态库与静态库的名称(最后库的文件名为:libbase.so、libGameServer.so或libbase.a、libGameServer.a),同时存在同名的静态库与动态库时,会优先匹配动态库;
-rdynamic:指示连接器把所有符号(而不仅仅只是程序已使用到的外部符号)都添加到动态符号表(即.dynsym表)里,以便dlopen或backtrace等函数使用;
-fstack-protector:启用堆栈保护,不过只为局部变量中含有char数组的函数插入保护代码;
-Wl:告诉编译器将后面的参数传递给链接器;
-Wl,-Bstatic:告诉链接器对接下来的-l选项使用静态链接;
-Wl,-Bdynamic:告诉链接器对接下来的-l选项使用动态链接;
+++++++++++++++++++++++++++++++++++++++
动态库链接时搜索路径顺序如下:
(1)-L参数指定的路径
(2)环境变量LD_LIBRARY_PATH指定的路径
(3)配置文件/etc/ld.so.conf中指定的路径
(4)/lib; /usr/lib;
+++++++++++++++++++++++++++++++++++++++
2. 生成.a静态库
LibVer = 10010100
CFLAGS = $(CFLAG)
CC = gcc
CPP = g++
CFLAGS += -g -D_SOLIB_VERSION=$(LibVer) -DGAME_SO -I./ -I../Common -I../Externals/SDK/INCLUDE/COMMON -I../Externals/SDK/INCLUDE/SERVER -I./include -I./SoLogicCtrl
ADDLIB = ../Externals/SDK/solib/libSDK.a
LIB = libGame.a
all:$(LIB)%.o : %.cpp
$(CPP) $(CFLAGS) -c $< -o $@%.o : %.c
$(CC) $(CFLAGS) -c $< -o $@ADDOBJS = BillReporter.o \
CreateLogic.o \
SoGameLogic.o \
./include/SvrCommonDef.o \
./SoLogicCtrl/SoBaseLogicCtrl.o \
../common/GameCommonDef.o$(LIB): $(ADDOBJS)
ar -rf $@ $(ADDOBJS)install:
cp $(BIN) /home/game/dll/$(BIN)
chmod g+w /home/game/dll/$(BIN)clean:
rm -f ./*.o
rm -f ./SoLogicCtrl/*.o
rm -f ../Common/*.o
rm -f ./include/*.o
rm -f $(LIB)
+++++++++++++++++++++++++++++++++++++++
静态库链接时搜索路径顺序:
(1)-L参数指定的路径
(2)环境变量LIBRARY_PATH指定的路径
(3)/lib; /usr/lib; /usr/loacl/lib;
+++++++++++++++++++++++++++++++++++++++
3. 生成可执行程序
CC=gcc
CXX=g++MOD = -g -D_DEBUG
INC = -Iinclude -IutilLIB_SRC = http://www.mamicode.com/util/md5.cpp /
queue.cppLIB_OBJ = md5.o \
queue.oLIB = libmd5.a
EXE_SRC = http://www.mamicode.com/impl.cpp
EXE_OBJ = impl.o
EXE = cltall: $(LIB) $(EXE)
$(LIB): $(LIB_OBJ)
@rm -f $(LIB)
ar q $(LIB) $(LIB_OBJ)$(LIB_OBJ): $(LIB_SRC)
$(CC) -c $(LIB_SRC) $(MOD) $(INC)$(EXE): $(EXE_OBJ)
$(CXX) -o $(EXE) $(EXE_OBJ) $(LIB)$(EXE_OBJ): $(EXE_SRC)
$(CC) -c $(EXE_SRC) $(MOD) $(INC).PHONY: clean
clean:
-rm -f $(LIB) $(LIB_OBJ) $(EXE) $(EXE_OBJ)
最后会输出名为clt的可执行程序;clt依赖libmd5.a的静态库,libmd5.a有修改时,会先编译libmd5.a