compile error

[root@localhost ffmpeg-0.9]# ./configure prefix=/home/tomato/pjsip/ffmpeg/ --enable-cross-compile --arch=arm --target-os=linux --cc=arm-hisiv200-linux-gcc --as=arm-hisiv200-linux-as --enable-gpl
GNU assembler not found, install gas-preprocessor

If you think configure made a mistake, make sure you are using the latest
version from Git.  If the latest version fails, report the problem to the
ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.freenode.net.
Include the log file "config.log" produced by configure as this will help
solving the problem.