Building Qt (4.8.4, didn't try 5 yet) 64Bit with VS2012 works without problems (if you disable webkit - if you need/want webkit, there's some work necessary).  All you need to do is (inside a VS 64bit command prompt):

configure.exe -no-webkit <add more switches if you like, see configure.exe -? for all available options>
nmake

Works for me ™

Building Qt (up to 4.8.x, didn't try 5 yet) 64Bit with VS2012 works without problems (if you disable webkit - if you need/want webkit, there's some work necessary).  All you need to do is (inside a VS 64bit command prompt):

 

configure.exe -no-webkit <add more switches if you like, see configure.exe -? for all available options>

nmake

 

Works for me ™