I have tried updating and installing gtk2.0-dev but no success. I tried to install the individual package using

# opkg install http://downloads.openwrt.org/snapshots/ … mipsel.ipk

but i do not have opkg installed, so it is of no use. I could not find any site to download opkg.
Guys help me how to resolve this issue  and successfully compile the SDK. The error that follow when runing MAKE is

++ mkdir -p /home/cisadmin/openwrt/8.09/staging_dir/toolchain-mipsel_gcc3.4.6
++ cd /home/cisadmin/openwrt/8.09/staging_dir/toolchain-mipsel_gcc3.4.6
++ mkdir -p bin lib include stamp
Checking 'intltool-update'... ok.
Checking 'gdk-pixbuf-csource'... failed.

gtk2: Please install gtk2.0-dev

make[3]: *** [prereq] Error 1
Checking 'openssl'... ok.
Checking 'rsync'... ok.
Checking 'xgettext'... ok.
Checking 'ruby'... ok.
Checking 'jikes'... ok.
Checking 'fastjar'... ok.
Checking 'xsltproc'... ok.
Package prerequisite check failed.
make[2]: *** [tmp/.prereq_packages] Error 1
make[1]: *** [prereq] Error 2
make: *** [world] Error 2