Shadow build with following configure options: -debug-and-release -opensource -force-debug-info -no-mp -no-compile-examples -no-sql-psql -no-sql-odbc -platform win32-msvc2013 -opengl dynamic -prefix d:\Qt\t\Qt5.8.0_alpha\5.8\msvc2013_ab_x64 -qtnamespace AbQt -qtlibinfix Ab64Qt58

Build fails with

d:\qt\qt5.8.0_alpha_sourcecode\qtbase\src\corelib\global\qglobal_p.h(52) : fatal error C1083: Cannot open include file: "QtCore/private/qconfig_p.h": No such file or directory (C:\Qt\Qt5.8.0_alpha_sourcecode\qtbase\src\corelib\animation\qsequentialanimationgroup.cpp)

The qconfig_p.h file is located in \qtbase\include\QtCore\5.8.0\QtCore\private, but the build is looking for it in \qtbase\include\QtCore\private.
In-source build succeeds with the same configure. As a workaround I moved the file to where it was looked for and modified the content accordingly.