cmake -DQT_QMAKE_EXECUTABLE=/usr/local/Trolltech/Qt-4.3.0/bin/qmake
参考资料:http://www.linuxquestions.org/questions/slackware-14/qmake-not-found-qt-4-3-4-is-installed-so-what-must-i-set-to-point-cmake-to-it-625837/