我有一个由CMake驱动的库和示例应用程序。所以,有一个类,我在库中使用:
sourceeditor.h
#ifndef SOURCEEDITOR_H
#define SOURCEEDITOR_H
#include <QWidget>
#include "novile_export.h"
namespace Novile
{
class SourceEditorPrivate;
class NOVILE_EXPORT SourceEditor : public QWidget
{
Q_OBJECT
public:
explicit SourceEditor(QWidget *parent = 0);
~SourceEditor();
private:
SourceEditorPrivate * const d;
};
} // namespace Novile
#endif // SOURCEEDITOR_H
sourceeditor.cpp
#include <QtCore>
#include <QVBoxLayout>
#include <QWebView>
#include "novile_debug.h"
#include "sourceeditor.h"
namespace Novile
{
class SourceEditorPrivate
{
public:
SourceEditorPrivate(SourceEditor *p = 0) :
parent(p),
aceView(new QWebView(p)),
layout(new QVBoxLayout(p))
{
parent->setLayout(layout);
layout->addWidget(aceView);
}
~SourceEditorPrivate()
{
}
void loadAceView()
{
aceView->load(QUrl("qrc:/ace.html"));
}
private:
SourceEditor *parent;
QWebView *aceView;
QVBoxLayout *layout;
};
SourceEditor::SourceEditor(QWidget *parent) :
QWidget(parent),
d(new SourceEditorPrivate(this))
{
mDebug() << "Source Editor has been started";
d->loadAceView();
}
SourceEditor::~SourceEditor()
{
}
} // namespace Novile
和示例:
的main.cpp
#include <QApplication>
#include "../src/sourceeditor.cpp"
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
Novile::SourceEditor editor;
editor.setGeometry(100, 50, 600, 300);
editor.show();
return app.exec();
}
然后我收到了很多ld
错误:
CMakeFiles/example.dir/main.cpp.o: In function `Novile::SourceEditor::SourceEditor(QWidget*)':
../src/sourceeditor.cpp:39: undefined reference to `vtable for Novile::SourceEditor'
../src/sourceeditor.cpp:39: undefined reference to `vtable for Novile::SourceEditor'
CMakeFiles/example.dir/main.cpp.o: In function `Novile::SourceEditor::~SourceEditor()':
../src/sourceeditor.cpp:46: undefined reference to `vtable for Novile::SourceEditor'
../src/sourceeditor.cpp:46: undefined reference to `vtable for Novile::SourceEditor'
collect2: error: ld returned 1 exit status
此文件(main.cpp)代表示例应用程序,它应该测试库的核心功能。
答案 0 :(得分:1)
问题很可能是因为您#include
.cpp
个文件:
#include "../src/sourceeditor.cpp"
你不应该这样做,而你不需要它。只需添加相应的标头sourceeditor.h
,如果需要,还可以包含novile_debug.h
标头。
然后,确保main.cpp
和sourceeditor.cpp
都是项目的一部分,这样编译器将处理这两个转换单元,链接器最终会将相应的对象代码合并到您的可执行文件中程序