Unsolved Qt 5.9.1: weird behavior of self-built qmake

[Justin Sayne]

Hi,

since we need Qt to be configured with OpenGL support, I was trying to build Qt 5.9.1 from source with MSVC 2013. For that I installed the sources from the generic installer and then just ran the following from the VStudio command line:

configure -prefix build -debug-and-release -opensource -confirm-license -nomake tests -nomake examples -skip qtwebkit -skip qtwebkit-examples -mp -opengl desktop

nmake

nmake install

Everything went fine and as expected but when I now execute the resulting qmake binary in a dummy folder like this:

/root
  |-testfolder
    |- test.h
    |- test.cpp

cd /root
qmake -project -win32 testfolder

The resulting pro file will contain this:

HEADERS += /testfolder/test.h testfolder/test
SOURCES += /testfolder/test.cpp testfolder/test.cpp

whereas if I execute the qmake binary delivered with the 5.9.1 binaries, everything works as expected and the output is

HEADERS += testfolder/test
SOURCES += testfolder/test.cpp

I've also tried this and had the same effect with Qt 5.6 and Qt 5.9. Does somebody have a clue what's going on here? The doubled paths will break our build when rcc tries to access the qrc files referenced from ui files because the paths starting with forward slashes are apparently interpreted as absolute...