在Ubuntu下解压Qt-4.5后运行./arm-qt4.5_build出现tslib失败，请大侠们指点

zh@ubuntu:/opt/EmbedSky/qt-4.5$ ls
arm_qt4.5_build  pro                                     x86_qt4.5_build
build            qt-embedded-linux-opensource-src-4.5.0
__install        setARM_env
zh@ubuntu:/opt/EmbedSky/qt-4.5$ sudo ./arm_qt4.5_build
[sudo] password for zh:
the build_arm directory is already !
the __install/arm directory is already !
Config Qt4.5 now, please wait ...
This is the Qt for Embedded Linux Open Source Edition.
Preparing build tree...
You are licensed to use this software under the terms of
the GNU Lesser General Public License (LGPL) version 2.1 or
the GNU General Public License (GPL) version 3.
Type '3' to view the GNU General Public License version 3.
Type 'L' to view the GNU Lesser General Public License version 2.1.
Type 'yes' to accept this license offer.
Type 'no' to decline this license offer.
Do you accept the terms of either license?
Creating qmake. Please wait...
gmake: 没有什么可以做的为 `first'。
The tslib functionality test failed!
You might need to modify the include and library search paths by editing
QMAKE_INCDIR and QMAKE_LIBDIR in
/opt/EmbedSky/qt-4.5/qt-embedded-linux-opensource-src-4.5.0/mkspecs/qws/linux-arm-g++.
Build Qt4.5 library now, please wait ...
gmake: *** 没有指明目标并且找不到 makefile。 停止。
Install Qt4.5 library now, please wait ...
gmake: *** 没有规则可以创建目标“install”。 停止。
zh@ubuntu:/opt/EmbedSky/qt-4.5$

在论坛上也看到别人碰到这问题，还是不知要怎样才能解决
这问题好久了，有劳各位帮忙！！！

你看下你有没有安装成功arm-linux-gcc

重新安装系统，在root身份下工作，得以解决。可能是环境不对造成的。