Re: [Mingw-cross-env-list] Undefined Reference errors when linking

[Simon A. Eugster]

On 02/20/2012 10:25 AM, Mark Brand wrote:
> > My project now successfully compiles, linking fails however, with
> > approximately 42 billion error messages like the ones posted at the end.
> <snip>
> > CMakeFiles/PhenoCam.dir/objects.a(exporterMainwindow.cpp.obj):exporterMainwindow.cpp:(.text+0xb1b):
> > undefined reference to `__imp___ZN5QJson6ParserC1Ev'
> > CMakeFiles/PhenoCam.dir/objects.a(exporterMainwindow.cpp.obj):exporterMainwindow.cpp:(.text+0xb40):
> > undefined reference to `__imp___ZN5QJson6Parser5parseERK10QByteArrayPb'
> > CMakeFiles/PhenoCam.dir/objects.a(exporterMainwindow.cpp.obj):exporterMainwindow.cpp:(.text+0x1379):
> > undefined reference to `__imp___ZN5QJson6ParserD1Ev'
> > CMakeFiles/PhenoCam.dir/objects.a(exporterMainwindow.cpp.obj):exporterMainwindow.cpp:(.text+0x1735):
> > undefined reference to `__imp___ZN5QJson6ParserD1Ev'
> > CMakeFiles/PhenoCam.dir/objects.a(selectVideoStep.cpp.obj):selectVideoStep.cpp:(.text+0x9e8):
> > undefined reference to `__imp___ZN5QJson6ParserC1Ev'
> > CMakeFiles/PhenoCam.dir/objects.a(selectVideoStep.cpp.obj):selectVideoStep.cpp:(.text+0xa16):
> > undefined reference to `__imp___ZN5QJson6Parser5parseEP9QIODevicePb'
> > CMakeFiles/PhenoCam.dir/objects.a(selectVideoStep.cpp.obj):selectVideoStep.cpp:(.text+0xc7c):
> > undefined reference to `__imp___ZN5QJson6ParserD1Ev'
>
> Hi Simon,
>
> You might find some clues here:
>
> http://stackoverflow.com/questions/5159353/how-can-i-get-rid-of-the-imp-prefix-in-the-linker-in-vc
>
>
> Somebody who knows more about cmake and qjson might be able to give more
> specific advice.
>
> Mark

Thanks for the link! If I understand correctly the json .lib is 
generated for a .dll? Which is controlled by cross-env? Or what could I 
do? Is it a mistake in my CMake files?

thanks
Simon