包括QDebug时mingw32链接器错误

Question

I have this minimal example:

QT -= gui
CONFIG += qt console
SOURCES += main.cpp

#include <QDebug>

int main(int argc, char** argv)
{
    return 0;
}

which gives this link error when building the project:

c:/qtsdk/mingw/bin/../lib/gcc/mingw32/4.4.0/../../../../mingw32/bin/ld.exe: final link failed: Invalid argument

The link command looks like this:

g++ -Wl -Wl -Wl,-subsystem,console -mthreads -o debug\\test.exe debug/main.o -L"c:\\QtSDK\\Desktop\\Qt\\4.8.1\\mingw\\lib" -lQtCored4

My setup:

• Windows XP SP3
• Qt SDK version 1.2.1 (QtCreator 2.4.1, Qt Desktop version 4.8.1) (fresh install at C:\\QtSDK\\ )
• MinGW32 version 4.4.0 (included in Qt SDK at C:\\QtSDK\\mingw\\ )

---

If I remove the #include <QDebug> , it compiles fine. If I include some other Qt header file, like for example QCoreApplication, it compiles fine, too.

EDIT: Here is a very strange minimal example. Consider an empty main function like above. Now if i put these includes, it fails to link:

#include <QWidget>
#include <QVariant>

But if I remove one of them , it links without an error.

What's the problem? Why doesn't mingw tell me what the invalid argument is ?

Answer 1

Im wondering is the linker could not find the lQtCored4 lib? Is it actually in the -L directory?