Officially ODB is supported with g++ 4.2.x - 4.7.x. I am aware of this. But unfortunately I am using RHEL 3 which includes g++ (GCC) 3.2.3 (Red Hat Linux 3.2.3-20). Does anyone have any idea whether I could use ODB with an old compiler? Any specific issues/features I should check? Thank you, Amit.