Win32 qmake: building a static library

[jacek]

So the build was successful, and I can just rename lib<name>.a to <name>.lib?

If you want to use that library in MinGW, you don't have to do anything, and if you want to use it in a program compiled with MSVC, you shouldn't, since MinGW isn't binary compatible with MSVC and it just won't work.