在ubuntu 12.04 64位版 安装qt-linux-opensource-5.1.1-x86-offline.run完成后，建立了一个Gui工程，编译出现下面的问题，网上没查到这个问题，求助各位大牛
/usr/bin/ld: skipping incompatible /opt/Qt5.1.1/5.1.1/gcc/lib/libQt5Widgets.so when searching for -lQt5Widgets
/usr/bin/ld: cannot find -lQt5Widgets
/usr/bin/ld: skipping incompatible /opt/Qt5.1.1/5.1.1/gcc/lib/libQt5Gui.so when searching for -lQt5Gui
/usr/bin/ld: cannot find -lQt5Gui
/usr/bin/ld: skipping incompatible /opt/Qt5.1.1/5.1.1/gcc/lib/libQt5Core.so when searching for -lQt5Core
/usr/bin/ld: cannot find -lQt5Core
collect2: ld returned 1 exit status
make: *** [qt_gui] Error 1
