转换Visual C ++项目以增强构建Makefile项目时，Qt信号和插槽中断

Question

I created a Visual C++ Project using MSVS and I just made another project in MSVS so that the same code can be built using boost build. I can currently build my project using a Visual C++ project as well as a Makefile project that uses boost build. There is a difference between the two builds though concerning QT Signals and Slots.For the following code,when I call MyThread::Start() the onTimeout() slot is called when the project is built in visual studio, but not called when built using boost build.

class MyThread: public QObject{
    Q_OBJECT
public:
    bool start();
public Q_SLOTS:
    void onTimeout();
private:
    QThread m_thread;
    QTimer m_timer;
};
void MyThread::start()
{
    m_timer.start(1000);
    m_thread.setObjectName(QString("GigeControl"));
    m_thread.start();
    m_timer.moveToThread(&m_thread);
}
void MyThread::onTimeout()
{
    //Do Stuff

}

I am really having a hard time trying to figure out the differences between the two builds,especially since I need those signals and slots to work. One major difference that I have noticed so far is that the Visual C++ project is built using /Zp1 so all structures are 1 byte alligned. This is not done in the boost project as I don't know how to. I've seen people on the internet mentioning that structure allignments (especially using #pragma pack can cause problems with QT).

If anyone has some experience they might be able to share it would be greatly appreciated.

Answer 1

It looks like the problem was in fact the structure packing. I am writing code for a couple of code bases that are being merged and there coincidentally happens to be some packing conflicts. To fix the packing for building with boost-build all I had to to was add this to the lib being generated in the Jamfile:

    lib foo
:
    ...
:
    ...
    <target-os>linux:<cxxflags>-fpack-struct=1
    <target-os>windows:<cxxflags>-Zp1
;

This worked for me so hopefully it will help someone else out if they get stuck here too