I know that WebKit is removed from the package, but its still supposed to build from source. which is no longer the case
a number of the generated Makefiles have incorrect reference to OPT:REF
its been generated as \OPT:REF which the linker is assuming is an obj file when in fact its supposed to be /OPT:REF linker option.
manually editing the Makefiles with the bad option allows one to proceed, but it should work out of git.
doing a shadow build configure of Qt with WebKit from git
not the only person who has seen this.