createlang plpgsql failing on redhatlinux7.2

I'm getting some problem on "createlang plpgsql". with REDHATLINUX7.2

These are all my system configurations..

We have a machine with  RedhatLinix 7.2, on top of this i upgraded the postgresql7.3.3 version. After creating a database, i'm trying to create a language for that database by using createlang plpgsql <dnname>

it throws an error " failed with some missing files". so, i copied /usr/local/pgsql/plpgsql.so from Redhatlinux8.0 machine and tried again to create a language. this time i got an error like 'Load of file /usr/lib/pgsql/plpgsql.so failed :/lib/i686/libc.so.6: version GLIB_2.3 not found (required by /usr/lib/pgsql/plpgsql.so).

Kindly guide to solve this issue. all ur helps are highly appreciable..

Thanks in advance,

Vijay