安装install说明文档的操作一步步做的
在gmake的时候报以下的错误，求助大侠帮助！
/usr/bin/ld: skipping incompatible /usr/X11R6/lib/libGL.so when searching for -lGL
/usr/bin/ld: skipping incompatible /usr/X11R6/lib/libGL.a when searching for -lGL
/usr/bin/ld: skipping incompatible /usr/X11R6/lib/libGL.so when searching for -lGL
/usr/bin/ld: skipping incompatible /usr/X11R6/lib/libGL.a when searching for -lGL
/usr/bin/ld: skipping incompatible /usr/X11R6/lib/libXmu.so when searching for -lXmu
/usr/bin/ld: skipping incompatible /usr/X11R6/lib/libXmu.a when searching for -lXmu
/usr/bin/ld: skipping incompatible /usr/X11R6/lib/libXmu.so when searching for -lXmu
/usr/bin/ld: skipping incompatible /usr/X11R6/lib/libXmu.a when searching for -lXmu
/usr/bin/ld: cannot find -lXmu
collect2: ld returned 1 exit status
gmake[2]: *** [../lib/libqt.so.3.3.8] Error 1
gmake[2]: Leaving directory `/home/gww/qt-x11-free-3.3.8/src'
gmake[1]: *** [sub-src] Error 2
gmake[1]: Leaving directory `/home/gww/qt-x11-free-3.3.8'
gmake: *** [init] Error 2
