linux:make error

i fellow http://www.nioswiki.com/linux (http://www.nioswiki.com/linux)

when i input make command,it came to a error as bellow;

make[2]: Entering directory `/mywork/nios2-linux/uClinux-dist/vendors/Altera/nios2'

set -e;

t=`nios2-wrs-linux-gnu-gcc -mhw-mul -mno-hw-mulx -print-file-name=libc.a`;

t=`dirname $t`/../..;

for i in $t/lib/*so*; do

i=`readlink -f "$i"`;

soname=`nios2-wrs-linux-gnu-readelf -d "$i" | sed -n '/(SONAME)/s:.*[[]\(.*\)[]].*:\1:p'`;

if [ ! -f "/mywork/nios2-linux/uClinux-dist/romfs/lib/$soname" ] ; then

romfs-inst.sh -d -p 755 $i /lib/$soname;

fi;

done;

if [ "y" = "y" ] ; then

/mywork/nios2-linux/uClinux-dist/vendors/AnalogDevices/trim-libs.sh;

fi;

if type nios2-wrs-linux-gnu-ldconfig >/dev/null 2>&1; then

nios2-wrs-linux-gnu-ldconfig -r /mywork/nios2-linux/uClinux-dist/romfs;

fi

/mywork/nios2-linux/uClinux-dist/vendors/AnalogDevices/trim-libs.sh: line 19: scanelf: command not found

ERROR: you do not have pax-utils installed

make[2]: *** [romfs.shared.libs] 错误 1

make[2]: Leaving directory `/mywork/nios2-linux/uClinux-dist/vendors/Altera/nios2'

make[1]: *** [romfs.post] 错误 2

make[1]: Leaving directory `/mywork/nios2-linux/uClinux-dist/vendors'

why it happenedd,and how can i deal with it??