4.2In sounds like a version of IBO, not InterBase or Firebird. I
suggest you leave these numbers unchanged.

Set

> How I configure the following constants to Firebird 1.5 ?
>
> // Version information
> IB_VERSION_MAJOR = '4';
> IB_VERSION_MINOR = '2';
> IB_VERSION_BUILD = 'I';
> IB_VERSION_SUB_RELEASE = 'n';