与CMAKE中的自定义外部库链接

有一个项目，在构建项目时存在链接库到项目的问题。如果有人告诉我如何解决这个问题，我将非常感激。据我了解问题是在图书馆的正确位置。所以，当建立与它正确链接的项目。与CMAKE中的自定义外部库链接

这是项目文件CmakeList

cmake_minimum_required(VERSION 3.5.1) 
project(maintenance) 

set(CMAKE_CXX_STANDARD 11) 
set(CMAKE_AUTOMOC ON) 
set(CMAKE_AUTORCC ON) 
set(CMAKE_AUTOUIC OFF) 
set(CMAKE_INCLUDE_CURRENT_DIR ON) 
#set(CMAKE_VERBOSE_MAKEFILE ON) 

find_package(Qt5Widgets REQUIRED) 
find_package(Qt5Core REQUIRED) 
find_package(Qt5Gui REQUIRED) 
find_package(Qt5Charts REQUIRED) 
find_package(Qt5Xml REQUIRED) 
find_package(Qt5Network REQUIRED) 

include_directories(../../088) 

#include(FindPackageHandleStandardArgs) 
#find_library(Network_LIBRARY NAMES NetworkCommunication PATHS ../../088/build-libs-ubuntu-Release) 
#find_package_handle_standard_args(Network DEFAULT_MSG Network_LIBRARY) 

add_library(NetworkCommunication SHARED IMPORTED) 
set_property(TARGET NetworkCommunication PROPERTY IMPORTED_LOCATION ${CMAKE_CURRENT_LIST_DIR}/../../088/build-libs-ubuntu-Release/libNetworkCommunication.so) 
set(Network_LIBRARY NetworkCommunication) 

#link_directories(${CMAKE_CURRENT_LIST_DIR}/../../088/build-libs-ubuntu-Release) 

qt5_add_resources(RCC_RESOURCES resources.qrc) 

file(GLOB SOURCE_FILES_2 
     ${CMAKE_CURRENT_SOURCE_DIR}/cop/*.h 
     ${CMAKE_CURRENT_SOURCE_DIR}/cop/*.cpp 
     ${CMAKE_CURRENT_SOURCE_DIR}/curves/*.h 
     ${CMAKE_CURRENT_SOURCE_DIR}/curves/*.cpp 
     ${CMAKE_CURRENT_SOURCE_DIR}/curves/shapes/*.h 
     ${CMAKE_CURRENT_SOURCE_DIR}/curves/shapes/*.cpp 
     ${CMAKE_CURRENT_SOURCE_DIR}/general/*.h 
     ${CMAKE_CURRENT_SOURCE_DIR}/general/*.cpp 
     ${CMAKE_CURRENT_SOURCE_DIR}/load_cells/*.h 
     ${CMAKE_CURRENT_SOURCE_DIR}/load_cells/*.cpp 
     ${CMAKE_CURRENT_SOURCE_DIR}/motors/*.h 
     ${CMAKE_CURRENT_SOURCE_DIR}/motors/*.cpp 
     ${CMAKE_CURRENT_SOURCE_DIR}/passive_mode/*.h 
     ${CMAKE_CURRENT_SOURCE_DIR}/passive_mode/*.cpp 
     ${CMAKE_CURRENT_SOURCE_DIR}/settings/*.h 
     ${CMAKE_CURRENT_SOURCE_DIR}/settings/*.cpp 
     ${CMAKE_CURRENT_SOURCE_DIR}/system/*.h 
     ${CMAKE_CURRENT_SOURCE_DIR}/system/*.cpp 
     ${CMAKE_CURRENT_SOURCE_DIR}/../Gener095/Messages/*.h 
     ${CMAKE_CURRENT_SOURCE_DIR}/../Gener095/Messages/*.cpp 
     ) 

set(SOURCE_FILES 
     Error.cpp 
     Error.hpp 
     main.cpp 
     MainWindow.cpp 
     MainWindow.h 
     NetworkCommunicator.cpp 
     NetworkCommunicator.h 
     Utils.cpp 
     Utils.h 
     ITab.h 
     ) 

add_executable(${PROJECT_NAME} ${SOURCE_FILES} ${SOURCE_FILES_2} ${RCC_RESOURCES}) 

#target_link_libraries(${PROJECT_NAME} ${Network_LIBRARY}) 
target_link_libraries(${PROJECT_NAME} NetworkCommunication) 
target_link_libraries(${PROJECT_NAME} Qt5::Widgets Qt5::Core Qt5::Gui Qt5::Charts Qt5::Xml Qt5::Network) 

include(../../088/BuildUtilities/scripts/lib_setup.cmake)

和日志有错误

... 
[ 95%] Building CXX object CMakeFiles/maintenance.dir/qrc_resources.cpp.o 
[ 97%] Building CXX object CMakeFiles/maintenance.dir/maintenance_autogen/moc_compilation.cpp.o 
[100%] Linking CXX executable maintenance 
CMakeFiles/maintenance.dir/MainWindow.cpp.o: In function `MainWindow::MainWindow(QMainWindow*)': 
/media/blinct/free1/QtProjects/Applications/095/maintenance/MainWindow.cpp:74: undefined reference to `TenzGraphTab::TenzGraphTab(QWidget*)' 
CMakeFiles/maintenance.dir/maintenance_autogen/moc_compilation.cpp.o: In function `AngleSensors::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)': 
/media/blinct/free1/QtProjects/Applications/095/maintenance/cmake-build-debug/maintenance_autogen/ECUKZBRF6L/moc_AngleSensors.cpp:92: undefined reference to `AngleSensors::OnSetNullPosition()' 
/media/blinct/free1/QtProjects/Applications/095/maintenance/cmake-build-debug/maintenance_autogen/ECUKZBRF6L/moc_AngleSensors.cpp:93: undefined reference to `AngleSensors::OnResetAccel()' 
/media/blinct/free1/QtProjects/Applications/095/maintenance/cmake-build-debug/maintenance_autogen/ECUKZBRF6L/moc_AngleSensors.cpp:94: undefined reference to `AngleSensors::OnDataReceived(QString, QMap<QString, QVariant>)' 
/media/blinct/free1/QtProjects/Applications/095/maintenance/cmake-build-debug/maintenance_autogen/ECUKZBRF6L/moc_AngleSensors.cpp:95: undefined reference to `AngleSensors::OnHandleUp()' 
/media/blinct/free1/QtProjects/Applications/095/maintenance/cmake-build-debug/maintenance_autogen/ECUKZBRF6L/moc_AngleSensors.cpp:96: undefined reference to `AngleSensors::OnHandleDown()' 
/media/blinct/free1/QtProjects/Applications/095/maintenance/cmake-build-debug/maintenance_autogen/ECUKZBRF6L/moc_AngleSensors.cpp:97: undefined reference to `AngleSensors::OnHandleReleased()' 
/media/blinct/free1/QtProjects/Applications/095/maintenance/cmake-build-debug/maintenance_autogen/ECUKZBRF6L/moc_AngleSensors.cpp:98: undefined reference to `AngleSensors::OnHandleTimer()' 
CMakeFiles/maintenance.dir/maintenance_autogen/moc_compilation.cpp.o:(.data.rel.ro._ZTV17AngleSensorColumn[_ZTV17AngleSensorColumn]+0x28): undefined reference to `AngleSensorColumn::~AngleSensorColumn()' 
CMakeFiles/maintenance.dir/maintenance_autogen/moc_compilation.cpp.o:(.data.rel.ro._ZTV17AngleSensorColumn[_ZTV17AngleSensorColumn]+0x30): undefined reference to `AngleSensorColumn::~AngleSensorColumn()' 
CMakeFiles/maintenance.dir/maintenance_autogen/moc_compilation.cpp.o:(.data.rel.ro._ZTV17AngleSensorColumn[_ZTV17AngleSensorColumn]+0x1c0): undefined reference to `non-virtual thunk to AngleSensorColumn::~AngleSensorColumn()' 
CMakeFiles/maintenance.dir/maintenance_autogen/moc_compilation.cpp.o:(.data.rel.ro._ZTV17AngleSensorColumn[_ZTV17AngleSensorColumn]+0x1c8): undefined reference to `non-virtual thunk to AngleSensorColumn::~AngleSensorColumn()' 
../../../088/build-libs-ubuntu-Release/libNetworkCommunication.so: undefined reference to `BtlSerialPortImpl::setRequestToSend(bool)' 
../../../088/build-libs-ubuntu-Release/libNetworkCommunication.so: undefined reference to `g_sVersion_NetworkCommunication' 
../../../088/build-libs-ubuntu-Release/libNetworkCommunication.so: undefined reference to `BtlUdpSocketImpl::writeDatagram(QByteArray const&, QHostAddress const&, unsigned short)' 
../../../088/build-libs-ubuntu-Release/libNetworkCommunication.so: undefined reference to `BtlTcpServerImpl::isListening() const' 
../../../088/build-libs-ubuntu-Release/libNetworkCommunication.so: undefined reference to `BtlFileImpl::close()' 
../../../088/build-libs-ubuntu-Release/libNetworkCommunication.so: undefined reference to `BtlTcpServerImpl::hasPendingConnections() const' 
../../../088/build-libs-ubuntu-Release/libNetworkCommunication.so: undefined reference to `BtlTcpSocketImpl::connectToHost(QHostAddress const&, unsigned short)' 
... 
../../../088/build-libs-ubuntu-Release/libNetworkCommunication.so: undefined reference to `BtlUdpSocketImpl::readDatagram(char*, long long, QHostAddress*, unsigned short*)' 
../../../088/build-libs-ubuntu-Release/libNetworkCommunication.so: undefined reference to `BtlTcpServerImpl::close()' 
collect2: error: ld returned 1 exit status 
CMakeFiles/maintenance.dir/build.make:936: recipe for target 'maintenance' failed 
make[3]: *** [maintenance] Error 1 
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/maintenance.dir/all' failed 
make[2]: *** [CMakeFiles/maintenance.dir/all] Error 2 
CMakeFiles/Makefile2:79: recipe for target 'CMakeFiles/maintenance.dir/rule' failed 
make[1]: *** [CMakeFiles/maintenance.dir/rule] Error 2 
Makefile:118: recipe for target 'maintenance' failed 
make: *** [maintenance] Error 2

在此先感谢。很长一段时间，我不明白如何解决这个问题。

来源

2017-07-19 Alexey Ananyev

你想编译并链接到'NetworkCommunication'或者它已经安装吗？ – Stewart

我编译了NetworkCommunication库，但是我无法将它链接到我的项目。 –

'据我了解问题是在库的正确位置。 - 链接器**找到**库，但库没有定义给定的符号（标记为“未定义的引用”）。可能你需要一些其他库来链接。但是，如果没有关于图书馆及其代码的意图的知识，就不可能提出明确的建议。 – Tsyvarev

如果NetworkCommunication是你已经编写并已经安装的东西，那么考虑在包中包含一个FindNetworkCommunication.cmake文件。该文件应包含的方法寻找NetworkCommunication像这样：

# Sets NetworkCommunication_FOUND if found. 
# 
# If NetworkCommunication_FOUND is TRUE, then the following variables are also 
# set: 
# 
# NetworkCommunication_LIBRARY  - Full path to library to link 
# NetworkCommunication_INCLUDE_DIR - Path to include directory 
# 
# $NetworkCommunicationDIR is an environment variable that would correspond to the 
# ./configure --prefix=$NetworkCommunicationDIR used in building NetworkCommunication. 
# 

find_path(NetworkCommunication_INCLUDE_DIR NetworkCommunication.h 
    HINTS 
    ENV NetworkCommunicationDIR 
    PATH_SUFFIXES include/NetworkCommunication include/NetworkCommunication include 
    PATHS 
    /opt/local 
    [HKEY_LOCAL_MACHINE\\SOFTWARE\\Alexey\\NetworkCommunication\\1.00.0000;InstallDir] 
) 

if(CMAKE_SIZEOF_VOID_P EQUAL 8) 
    set(_NetworkCommunication_ARCH_DIR libs/Win64) 
else() 
    set(_NetworkCommunication_ARCH_DIR libs/Win32) 
endif() 

find_library(NetworkCommunication_LIBRARY 
    NAMES NetworkCommunication 
    HINTS 
    ENV NetworkCommunicationDIR 
    PATH_SUFFIXES lib64 lib libs64 libs ${_NetworkCommunication_ARCH_DIR} 
    PATHS 
    /opt/local 
    [HKEY_LOCAL_MACHINE\\SOFTWARE\\Alexey\\NetworkCommunication\\1.00.0000;InstallDir] 
) 

unset(_NetworkCommunication_ARCH_DIR) 

include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake) 
FIND_PACKAGE_HANDLE_STANDARD_ARGS(NetworkCommunication DEFAULT_MSG NetworkCommunication_LIBRARY NetworkCommunication_INCLUDE_DIR) 
mark_as_advanced(NetworkCommunication_LIBRARY NetworkCommunication_INCLUDE_DIR)

复制FindNetworkCommunication.cmake到cmake的安装的模块文件夹（/usr/share/cmake-3.8/Modules）或将其复制到本地文件夹，包括${CMAKE_MODULES_PATH}路径到该文件夹。

接下来，在你的CMakeLists.txt文件的维护项目添加以下后add_executable

Find_Package(NetworkCommunication REQUIRED) 
if (NetworkCommunication_FOUND) 
    target_include_directories(${PROJECT_NAME} ${NetworkCommunication_INCLUDE_DIR}) 
    target_link_libraries(${PROJECT_NAME} ${NetworkCommunication_LIBRARY}) 
endif (NetworkCommunication_FOUND)

这是一个很好的解决方案，如果NetworkCommunication是用于通过维护但你一个独立的库打算也让其他几家图书馆也使用它。如果NetworkCommunication是与维护相同的项目解决方案的一部分，并且实际上只是要连接到一个项目，那么可能有更简单的解决方案。

来源

2017-07-19 19:36:32 Stewart

在maintenance.pro为Qt Creator的，我有这个链接，这个库

U_LIB_DIR_PREFIX += ../../088/build-libs 
U_LIBS += NetworkCommunication

有另一个项目很多类似的库和我联系喜欢

U_LIBS += NetworkCommunication \ 
    Logging \ 
    UnitController \ 
    TherapyRunnersController \ 
    GenersControllerCommon

所有这些库的建立动态库。在此之后，我将这些库链接到项目。

来源

2017-07-19 20:52:51

也许有另一种方式如何将库链接到项目？

因为如果你从QtCreator项目文件maintenance.pro比较这选项

U_LIB_DIR_PREFIX += ../../088/build-libs-ubuntu-Release 
U_LIBS += NetworkCommunication

，并和写作各库模块，事实证明很奇怪，难与2号线的比较*的.pro

来源

2017-07-20 08:07:36

与CMAKE中的自定义外部库链接

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