QtBase is built OK, but later ActiveX and XMLPatterns projects fail to build (errors are about missing header files, which in fact exist, hence this looks like a header path issue).
I used this simple configure:
configure -debug-and-release -make-tool jom -commercial -confirm-license
Building 5.5.1 on the same machine has never been a problem.
I use the commercial packages. I tried both zip and tar