我使用
为QT5生成了moc文件set (CMAKE_AUTOMOC ON)
set(CMAKE_INCLUDE_CURRENT_DIR ON)
然后我使用
将moc文件添加到SRC中SET(SRC
src/main.cpp
src/video_widget_surface.cpp
src/video_widget.cpp
src/video_player.cpp
#moc files
moc/moc_video_player.cpp
moc/moc_video_widget.cpp
moc/moc_video_widget_surface.cpp
最后,我使用
添加可执行文件add_executable(somegui ${SRC})
但我在moc文件中遇到错误:
/other/workspace/perception/somestuff/moc/moc_video_widget.cpp:54:6: error: 'VideoWidget' has not been declared
/other/workspace/perception/somestuff/moc/moc_video_widget.cpp:62:19: error: 'VideoWidget' has not been declared
/other/workspace/perception/somestuff/moc/moc_video_widget.cpp:68:20: error: 'VideoWidget' has not been declared
/other/workspace/perception/somestuff/moc/moc_video_widget.cpp:68:46: error: non-member function 'const QMetaObject* metaObject()' cannot have cv-qualifier
/other/Qt5.0.1/5.0.1/gcc_64/include/QtCore/qobject.h: In function 'const QMetaObject* metaObject()':
/other/Qt5.0.1/5.0.1/gcc_64/include/QtCore/qobject.h:401:33: error: 'QScopedPointer<QObjectData> QObject::d_ptr' is protected
/other/workspace/perception/somestuff/moc/moc_video_widget.cpp:70:21: error: within this context
/other/Qt5.0.1/5.0.1/gcc_64/include/QtCore/qobject.h:401:33: error: invalid use of non-static data member 'QObject::d_ptr'
/other/workspace/perception/somestuff/moc/moc_video_widget.cpp:70:21: error: from this location
/other/Qt5.0.1/5.0.1/gcc_64/include/QtCore/qobject.h:401:33: error: 'QScopedPointer<QObjectData> QObject::d_ptr' is protected
/other/workspace/perception/somestuff/moc/moc_video_widget.cpp:70:50: error: within this context
/other/Qt5.0.1/5.0.1/gcc_64/include/QtCore/qobject.h:401:33: error: invalid use of non-static data member 'QObject::d_ptr'
/other/workspace/perception/somestuff/moc/moc_video_widget.cpp:70:50: error: from this location
/other/workspace/perception/somestuff/moc/moc_video_widget.cpp: At global scope:
/other/workspace/perception/somestuff/moc/moc_video_widget.cpp:73:7: error: 'VideoWidget' has not been declared
/other/workspace/perception/somestuff/moc/moc_video_widget.cpp: In function 'void* qt_metacast(const char*)':
/other/workspace/perception/somestuff/moc/moc_video_widget.cpp:77:47: error: expected type-specifier before 'VideoWidget'
/other/workspace/perception/somestuff/moc/moc_video_widget.cpp:77:47: error: expected '>' before 'VideoWidget'
/other/workspace/perception/somestuff/moc/moc_video_widget.cpp:77:47: error: expected '(' before 'VideoWidget'
/other/workspace/perception/somestuff/moc/moc_video_widget.cpp:77:47: error: 'VideoWidget' was not declared in this scope
/other/workspace/perception/somestuff/moc/moc_video_widget.cpp:77:59: error: expected primary-expression before '>' token
/other/workspace/perception/somestuff/moc/moc_video_widget.cpp:77:61: error: invalid use of 'this' in non-member function
/other/workspace/perception/somestuff/moc/moc_video_widget.cpp:77:67: error: expected ')' before ';' token
/other/workspace/perception/somestuff/moc/moc_video_widget.cpp:78:40: error: cannot call member function 'virtual void* QWidget::qt_metacast(const char*)' without object
/other/workspace/perception/somestuff/moc/moc_video_widget.cpp: At global scope:
/other/workspace/perception/somestuff/moc/moc_video_widget.cpp:81:5: error: 'VideoWidget' has not been declared
/other/workspace/perception/somestuff/moc/moc_video_widget.cpp: In function 'int qt_metacall(QMetaObject::Call, int, void**)':
/other/workspace/perception/somestuff/moc/moc_video_widget.cpp:83:43: error: cannot call member function 'virtual int QWidget::qt_metacall(QMetaObject::Call, int, void**)' without object
/other/workspace/perception/somestuff/moc/moc_video_widget.cpp: In function 'void* qt_metacast(const char*)':
/other/workspace/perception/somestuff/moc/moc_video_widget.cpp:79:1: warning: control reaches end of non-void function [-Wreturn-type]
/other/workspace/perception/somestuff/moc/moc_video_widget.cpp: In function 'const QMetaObject* metaObject()':
/other/workspace/perception/somestuff/moc/moc_video_widget.cpp:71:1: warning: control reaches end of non-void function [-Wreturn-type]
make[2]: *** [CMakeFiles/somestuff.dir/moc/moc_video_widget.cpp.o] Error 1
make[1]: *** [CMakeFiles/somestuff.dir/all] Error 2
make: *** [all] Error 2
我的理解是在创建的moc文件中存在一些错误。但我无法控制如何创建它。现在我该如何解决这个错误?
答案 0 :(得分:10)
CMake文档并没有那么糟糕,不要忽视阅读它。你误解了 AUTOMOC 的概念:
AUTOMOC是一个布尔值,指定CMake是否自动处理Qt
moc
预处理器,即不必使用QT4_WRAP_CPP()
宏。目前支持Qt4。当此属性设置为TRUE
时,CMake将在构建时扫描源文件并相应地调用moc
。如果找到#include
#include "moc_foo.cpp"
语句,则标题中应包含Q_OBJECT
类声明,并且在头文件上运行moc
。如果找到#include
#include "foo.moc"
语句,则在当前源文件中需要Q_OBJECT
,并在文件本身上运行moc
。此外,所有头文件都会针对Q_OBJECT
宏进行解析,如果找到,还会对这些文件执行moc
。
因此,首先,您应不将生成的moc
文件显式添加到源并将其推送到可执行编译中。换句话说,你只推动你的来源:
SET(SRC
src/main.cpp
src/video_widget_surface.cpp
src/video_widget.cpp
src/video_player.cpp)
和moc
由CMake自动处理。
其次,正如文件中所述:
如果Q_OBJECT
中有foo.h
(即在头文件中声明QObject
),
然后在相应的foo.cpp
不要忘记添加#include "moc_foo.cpp"
,最好是在最后
该文件;
如果Q_OBJECT
中有foo.cpp
(即在源文件中声明QObject
),
然后,再次,在foo.cpp
本身
不要忘记添加#include "foo.moc"
,最好是在最后
该文件。