gmake Errors: pg_backup_archiver.c: undefined reference to `lo_create'

Hello,

When I tried to install postgresql 8.1.4, I got the following errors.

Could someone tell me what are missing or wrong please?
==============================================

./configure --prefix='/home/postgresql/' --without-docdir --without-readline
. gmake

pg_backup_archiver.o(.text+0x10f4): In function `StartRestoreBlob':
pg_backup_archiver.c: undefined reference to `lo_create'
collect2: ld returned 1 exit status
gmake[3]: *** [pg_dump] Error 1
gmake[3]: Leaving directory `/home/postgresql-snapshot/src/bin/pg_dump'
gmake[2]: *** [all] Error 2
gmake[2]: Leaving directory `/home/postgresql-snapshot/src/bin'
gmake[1]: *** [all] Error 2
gmake[1]: Leaving directory `/home/postgresql-snapshot/src'
gmake: *** [all] Error 2