I still get the same error when running configure.bat. After a while, I get :

g++ -o "../bin/qmake.exe" project.o option.o property.o main.o ioutils.o proitems.o qmakevfs.o qmakeglobals.o 
qmakeparser.o qmakeevaluator.o qmakebuiltins.o makefile.o unixmake2.o unixmake.o mingw_make.o winmakefile.o 
projectgenerator.o meta.o makefiledeps.o metamakefile.o xmloutput.o pbuilder_pbx.o msvc_vcproj.o msvc_vcxproj.o 
msvc_nmake.o msvc_objectmodel.o msbuild_objectmodel.o qtextcodec.o qutfcodec.o qstring.o qstring_compat.o qstringbuilder
.o qtextstream.o qiodevice.o qringbuffer.o qdebug.o qmalloc.o qglobal.o qarraydata.o qbytearray.o qbytearraymatcher.o 
qdatastream.o qbuffer.o qlist.o qfiledevice.o qfile.o qfilesystementry.o qfilesystemengine.o qfsfileengine.o 
qfsfileengine_iterator.o qregexp.o qvector.o qbitarray.o qdir.o qdiriterator.o quuid.o qhash.o qfileinfo.o qdatetime.o 
qstringlist.o qabstractfileengine.o qtemporaryfile.o qmap.o qmetatype.o qsettings.o qsystemerror.o qlibraryinfo.o 
qvariant.o qvsnprintf.o qlocale.o qlocale_tools.o qlinkedlist.o qnumeric.o qcryptographichash.o qxmlstream.o qxmlutils.o
 qlogging.o qjson.o qjsondocument.o qjsonparser.o qjsonarray.o qjsonobject.o qjsonvalue.o qfilesystemengine_win.o 
qfilesystemiterator_win.o qfsfileengine_win.o qlocale_win.o qsettings_win.o qsystemlibrary.o registry.o  -static -s -
lole32 -luuid -ladvapi32 -lkernel32 -Wl,--gc-sections
qsettings.o: In function `windowsConfigPath':
z:/QNX7/Qt/s/qtbase/src/corelib/io/qsettings.cpp:959: undefined reference to `SHGetKnownFolderPath'
collect2.exe: error: ld returned 1 exit status
Makefile:175: recipe for target '../bin/qmake.exe' failed
mingw32-make: *** [../bin/qmake.exe] Error 1
Building qmake failed, return code 2

Obviously, the problem appears at the link phase. 

Does the MinGW-W64 version is of importance ?