get a fresh ns-allinone-2.26.tar.gz www.sourceforge.net (search for nsnam) tar -zxvf ns-allinone-2.26tar.gz patch -p0 < ns-2-26-gcc410.patch cd ns-allinone-2.26 ./insta- get a fresh ns-allinone-2.26.tar.gz www.sourceforge.net (sea