Link Error Linux AS3: undefined reference to `oracle::occi::Environment

Question

I got this error when i try to run sample database access using OCCI libraries.
test.cpp:21: undefined reference to `oracle::occi::Environment::createEnvironment(oracle::occi::Environment::Mode, void*, void* (*)(void*, unsigned int), void* (*)(void*, void*, unsigned int), void (*)(void*, void*))'
Following link contains same problem but there is no answer.
#include <iostream>
#include <occi.h>
using oracle::occi::Connection;
using oracle::occi::Environment;
using oracle::occi::Statement;
using oracle::occi::ResultSet;
using namespace std;
int main() {
Environment *environment;
Connection *con;
Statement* stmt;
ResultSet* res;
try {
//std::cout << "dasfasfafa";
environment = Environment::createEnvironment(oracle::occi::Environment::DEFAULT);
con = environment->createConnection("aaa", "aaa", "Caaa");
stmt = con->createStatement("select * from emp");
res = stmt->executeQuery();
while (res->next())
std::cout << res->getInt(1) << " " << res->getString(2) << std::endl;
stmt->closeResultSet(res);
con->terminateStatement(stmt);
environment->terminateConnection(con);
} catch (oracle::occi::SQLException &e) {
std::cout << e.what();
return 0;
}

Answer 1

The demos have this:
#include <iostream>
#include <occi.h>
using namespace oracle::occi;
using namespace std;
...