Unpack the attached archive,
- cd inside the tools\dummy folder
Then nmake gives the wrong main_window.cpp source file to cl.exe.
It should be tools\dummy\main_window.cpp but it's ..\..\src\ui\main_window.cpp.
Is it qmake that generates a wrong Makefile or nmake that fails to correctly interprets the Makefile ?
Note that with linux g++/make (gcc 4.4.3) there is no problem.