possible vs2013 qt5.2.1 opengl issue win7 inside mac parallels

[schnitzel]

I'm using Visual Studio 2013 inside a win7 VM on Mac Parallels. I'd like to use qtquick2. Qt 5.2.1 for Windows 32-bit (MinGW 4.8, OpenGL) works fine in this case.
Since I have VS2013, I'd figure that I need to build Qt from sources. I configured with opengl desktop and now the simple helloworld default qtquick project only comes up 1 out of 10 times correctly, the other times I see full black or random full colors or a mix of colors diagonally split. I assume this is an issue with opengl. However that doesn't quite explain why mingw with opengl works fine.
I'm now building again without the opengl option. Am I wasting my time trying this?

[schnitzel]

update...

I cleaned the repository, then configured with the following:

configure -developer-build -opensource -nomake examples -nomake tests

configure -developer-build -opensource -nomake examples -nomake tests

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it works now

you probably wonder why I didn't just go with the mingw install... because the target machine already has the dotnet and vc++ libraries.