DevOps, CI/CD and Automation

oracle9i, redhat8.0, demos come from database installation

make -f demo_rdbms.mk demos #passed but
make -f demo_rdbms.mk occidemos #failed with following message
...
occiclob.o: undefined reference to 'typeinfo for oracle::occi::SQLException'
.
.
.
occiclob.o: undefined reference to 'oracle::occi::Environment::createEnvironment(..)'
...

compiling single demo gets similar err. include directories and lib path seem fine
in all *.cpp files, there are:
#include <iostream.h> // or <iostream>
#include <occi.h>
using namespace oracle::occi
using namespace std
...

Any clues on throubleshooting?

Many thanks

XY