I need someone to help me (in Windows and Mingw context); when I typed qmake it gives:

QMAKESPEC has not been set, so configuration cannot be deduced
Error processing project file: (my root dir/source dir. of an app.)/goldendict.pro

as I try to build an open-source dictionary app called 'Golden dictionary', which has goldendict.pro file included in it. Please keep in mind: it's on Windows, I'm blind to Linux. How one teach high skill to someone blind?..
How to solve this kind of problem? Many gratitude in advance.