导致未定义的引用错误

Cmake undefined referance error

本文关键字：引用 错误 未定义      更新时间：2023-10-16

我很难让Cmake工作。我正在使用ROS和catkin_make。我读了以下内容:对函数做未定义的引用创建未定义的引用

，但似乎仍然无法编译。我试图在我的代码上使用谷歌单元测试。我是新来的cmake和谷歌测试。我肯定我错过了一些非常小而明显的东西。
我把测试放在一个文件"test_usbl.cpp"和一个应该调用所有测试的主文件中。

我的文件:

usbl
    ├── CMakeLists.txt
    ├── CMakeLists.txt~
    ├── include
    │   └── usbl
    │       └── usblSim.h
    ├── package.xml
    ├── src
    │   ├── usblSim.cpp
    │   └── usblSim.cpp~
    └── test
        ├── test_main.cpp
        └── test_usbl.cpp
这是我的cmakelist。txt: 
    CMAKE_MINIMUM_REQUIRED(VERSION 2.8.3)
PROJECT(usbl)
SET(CMAKE_CXX_FLAGS "-g -std=c++0x ${CMAKE_CXX_FLAGS}")
FIND_PACKAGE(catkin REQUIRED COMPONENTS
  geometry_msgs
  roscpp
  std_msgs
)
FIND_PACKAGE(GTest REQUIRED)
FIND_PACKAGE(Boost)
FIND_PACKAGE(Threads)
catkin_package( )
SET(INCLUDE_DIRS
  ${GTEST_INCLUDE_DIRS}
  ${Boost_INCLUDE_DIRS}
  ${catkin_INCLUDE_DIRS}
  include/usbl
)
INCLUDE_DIRECTORIES(${INCLUDE_DIRS})
INCLUDE_DIRECTORIES(${CMAKE_CURRENT_SOURCE_DIR}/../include/usbl)
SET(SRC
  ${CMAKE_CURRENT_SOURCE_DIR}/src/usblSim.cpp}
  )
SET(LIBS 
  ${ROS_LIBRARIES}
  ${catkin_LIBRARIES}
  ${Boost_LIBRARIES}
  ${GTEST_LIBRARIES}
  ${CMAKE_THREAD_LIBS_INIT}

)
# simulator
#ADD_EXECUTABLE(usblSim src/usblSim.cpp)
add_library(usbl src/usblSim.cpp)
#TARGET_LINK_LIBRARIES(usblSim ${LIBS})

SET(USBL_TEST
  test/test_usbl.cpp
  test/test_main.cpp
  )
ADD_EXECUTABLE(test_usbl ${USBL_TEST})
TARGET_LINK_LIBRARIES(test_usbl ${LIBS})

这给了我错误:

 CMakeFiles/test_usbl.dir/test/test_usbl.cpp.o: In function `meanTest_isEquel_Test::TestBody()':
/home/nathaniel/Documents/usbl/src/usbl/test/test_usbl.cpp:12: undefined reference to `usblSim::usblSim()'

找到了解决方案，必须做到:

SET(LIBS 
  ${ROS_LIBRARIES}
  ${catkin_LIBRARIES}
  ${Boost_LIBRARIES}
  ${GTEST_LIBRARIES}
  ${CMAKE_THREAD_LIBS_INIT}
  ${PROJECT_NAME}#This is the new line
)
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