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我在将QQmlEngine纳入cmake项目中遇到了麻烦。

这是我的c++:

#include <QtQml/QQmlEngine>
...
QObject *someQObject;
QQmlEngine::setObjectOwnership(someQObject, QQmlEngine::ObjectOwnership::CppOwnership);

和cmake部分:

find_package(Qt5Core REQUIRED)
find_package(Qt5Gui REQUIRED)
find_package(Qt5Qml REQUIRED)
find_package(Qt5Quick REQUIRED)
...
add_executable(name ${src})
qt5_use_modules(name Core Gui Qml Quick )

编译失败:

CMakeFiles/....cpp.o: In function `...':
....cpp:57: undefined reference to `QQmlEngine::setObjectOwnership(QObject*, QQmlEngine::ObjectOwnership)'
clang-3.8: error: linker command failed with exit code 1 (use -v to see invocation)

我错过了什么?

编辑，@qCring(抱歉，不能评论你的答案):

好吧，当我离开"setobjectowership"调用时，一切都很好。Qt应用程序的其余部分运行良好。因此，它实际上是链接的。

当我加上你的台词，我得到

"The plain signature for target_link_libraries has already been used with the target "name".  All uses of target_link_libraries with a target   must be either all-keyword or all-plain."

我的问题不知怎么消失了。我在x86_64上运行arch linux