debian, sid,编译发生错误

xsam

提示：
checking for libXext... no
configure: error: We need a working libXext to proceed. Since configure
can't find it itself, we stop here assuming that make wouldn't find
them either.


我查过，我的系统有上述文件。
by the way ,for sarge的deb包不适用于我的系统，因为本人用的是libqt3-mt

mandrakechina

libxext-dev没有装。