ubuntu 编译单个包bash脚本

http://sns.akaedu.org/home/space.php?uid=2&do=blog&id=743
#!/bin/bash
if [ -n "$1" ]
then   
echo ":: fetching necessary packages for build"   
apt-get build-dep "$@"   
echo ":: fetching source"   
apt-get source "$@"
fi
ourflags=$CFLAGS
echo :: using $ourflags
for directory in `ls -Al | awk '/^d/ {print $8}'`;
do   
echo :: entering directory $directory ...   
cd $directory   
sed -e 's/-O2/'"${ourflags}"'/g' -i `ls -Al | awk '/^-/ {print $8}'`   
cd debian   
sed -e 's/-O2/'"${ourflags}"'/g' -i `ls -Al | awk '/^-/ {print $8}'`   
cd ..    dpkg-buildpackage -rfakeroot -uc -b   
echo :: leaving directory $directory ...   
cd ..
done