/usr/share/qt4/mkspecs/unsupported/ is in qt4-qmake 4:4.8.1-0ubuntu4.
This file is owned by root:root, with mode 0o755.
..
/usr/share/qt4/mkspecs/unsupported/linux-armcc/
/usr/share/qt4/mkspecs/unsupported/linux-armcc/qmake.conf
/usr/share/qt4/mkspecs/unsupported/linux-armcc/qplatformdefs.h
/usr/share/qt4/mkspecs/unsupported/linux-clang/
/usr/share/qt4/mkspecs/unsupported/linux-clang/qmake.conf
/usr/share/qt4/mkspecs/unsupported/linux-clang/qplatformdefs.h
/usr/share/qt4/mkspecs/unsupported/linux-host-g++/
/usr/share/qt4/mkspecs/unsupported/linux-host-g++/qmake.conf
/usr/share/qt4/mkspecs/unsupported/linux-host-g++/qplatformdefs.h
/usr/share/qt4/mkspecs/unsupported/linux-scratchbox2-g++/
/usr/share/qt4/mkspecs/unsupported/linux-scratchbox2-g++/qmake.conf
/usr/share/qt4/mkspecs/unsupported/linux-scratchbox2-g++/qplatformdefs.h
/usr/share/qt4/mkspecs/unsupported/macx-clang/
/usr/share/qt4/mkspecs/unsupported/macx-clang/Info.plist.app
/usr/share/qt4/mkspecs/unsupported/macx-clang/Info.plist.lib
/usr/share/qt4/mkspecs/unsupported/macx-clang/qmake.conf
/usr/share/qt4/mkspecs/unsupported/macx-clang/qplatformdefs.h
/usr/share/qt4/mkspecs/unsupported/qnx-X11-g++/
/usr/share/qt4/mkspecs/unsupported/qnx-X11-g++/qmake.conf
/usr/share/qt4/mkspecs/unsupported/qnx-X11-g++/qplatformdefs.h
/usr/share/qt4/mkspecs/unsupported/qnx-armv7le-qcc/
/usr/share/qt4/mkspecs/unsupported/qnx-armv7le-qcc/qmake.conf
/usr/share/qt4/mkspecs/unsupported/qnx-armv7le-qcc/qplatformdefs.h
/usr/share/qt4/mkspecs/unsupported/qnx-x86-qcc/
/usr/share/qt4/mkspecs/unsupported/qnx-x86-qcc/qmake.conf
/usr/share/qt4/mkspecs/unsupported/qnx-x86-qcc/qplatformdefs.h
/usr/share/qt4/mkspecs/unsupported/qws/
/usr/share/qt4/mkspecs/unsupported/qws/integrity-x86-cx86/
/usr/share/qt4/mkspecs/unsupported/qws/integrity-x86-cx86/qmake.conf
/usr/share/qt4/mkspecs/unsupported/qws/integrity-x86-cx86/qplatformdefs.h
/usr/share/qt4/mkspecs/unsupported/qws/linux-x86-openkode-g++/
/usr/share/qt4/mkspecs/unsupported/qws/linux-x86-openkode-g++/qmake.conf
/usr/share/qt4/mkspecs/unsupported/qws/linux-x86-openkode-g++/qplatformdefs.h
/usr/share/qt4/mkspecs/unsupported/qws/qnx-641/
/usr/share/qt4/mkspecs/unsupported/qws/qnx-641/qmake.conf
/usr/share/qt4/mkspecs/unsupported/qws/qnx-641/qplatformdefs.h
/usr/share/qt4/mkspecs/unsupported/vxworks-ppc-dcc/
/usr/share/qt4/mkspecs/unsupported/vxworks-ppc-dcc/qmake.conf
/usr/share/qt4/mkspecs/unsupported/vxworks-ppc-dcc/qplatformdefs.h
/usr/share/qt4/mkspecs/unsupported/vxworks-ppc-g++/
/usr/share/qt4/mkspecs/unsupported/vxworks-ppc-g++/qmake.conf
/usr/share/qt4/mkspecs/unsupported/vxworks-ppc-g++/qplatformdefs.h
/usr/share/qt4/mkspecs/unsupported/vxworks-simpentium-dcc/
/usr/share/qt4/mkspecs/unsupported/vxworks-simpentium-dcc/qmake.conf
/usr/share/qt4/mkspecs/unsupported/vxworks-simpentium-dcc/qplatformdefs.h
/usr/share/qt4/mkspecs/unsupported/vxworks-simpentium-g++/
/usr/share/qt4/mkspecs/unsupported/vxworks-simpentium-g++/qmake.conf
/usr/share/qt4/mkspecs/unsupported/vxworks-simpentium-g++/qplatformdefs.h
/usr/share/qt4/mkspecs/unsupported/win32-g++-4.6-cross/
/usr/share/qt4/mkspecs/unsupported/win32-g++-4.6-cross/qmake.conf
/usr/share/qt4/mkspecs/unsupported/win32-g++-4.6-cross/qplatformdefs.h
/usr/share/qt4/mkspecs/unsupported/win32-g++-cross/
/usr/share/qt4/mkspecs/unsupported/win32-g++-cross/qmake.conf
/usr/share/qt4/mkspecs/unsupported/win32-g++-cross/qplatformdefs.h