我运行完两条指令后：
source /opt/mini6410/qtopia-free-2.2.0/setQpeEnv
qmake -spec qws/linux-arm-g++ -lpthread -o Makefile *.pro
出现了这样的错误，
***Unknown option -lpthread
Usage: qmake [mode] [options] [files]
QMake has two modes, one mode for generating project files based on
some heuristics, and the other for generating makefiles. Normally you
shouldn't need to specify a mode, as makefile generation is the default
mode for qmake, but you may use this to test qmake on an existing project
无法生成Makefile，请问我该从哪个方向入手解决这个问题呢？谢谢各位高手。
