Question

我尝试建立progect。当我制作./build.sh -arch x64时，我收到一个链接错误：

Linking CXX shared library /home/buzanova/gmat/application/bin/libGmatBase.so [72%] Built target GmatBase Linking CXX executable /home/buzanova/gmat/application/bin/gmatConsole /home/buzanova/gmat/application/bin/libGmatBase.so.R2013a: undefined reference to DelaL::DelaL(std::string const&, GmatBase*) etc.....

我的CMakeFile.txt包含

if (UNIX)
MESSAGE("-- Using a shared base library")
IF(APPLE) # mac
    SET(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -dylib -dynamiclib -two_levelnamespace -undefined dynamic_lookup")

    # snow leopard
    #SET(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -arch i386")
endif()
endif (UNIX)
INCLUDE_DIRECTORIES("./include")
INCLUDE_DIRECTORIES("./foundation")
INCLUDE_DIRECTORIES("./hardware")
etc......
SET(BASE_SRCS
    asset/AssetException.cpp
    asset/BodyFixedPoint.cpp
    asset/GroundstationInterface.cpp
etc...
SET(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/../../application/bin")

ADD_LIBRARY(${TargetName} SHARED ${BASE_SRCS})

我该如何解决？

Answer 1

对于静态库，您需要添加一些链接器标志：

-L<lib_path> -l:<lib_name>

这是一个例子（假设dir myLib与makefile位于同一目录中）：

STATIC_LIBS = -L$(CURDIR)/myLib -l:myLib.a
all: $(EXECUTABLE) 

$(EXECUTABLE): $(OBJ) 
    $(CC) $(LDFLAGS) $(OBJ) $(STATIC_LIBS) -o $@  
.c.o:
    $(CC) $(CFLAGS)  -o $@ $<

clean:
    $(RM) $(EXECUTABLE) $(OBJ)  make.out

链接CXX可执行文件

1 个答案: