The Acu4GL for DB2 product on UNIX is an add-on module. The installation includes a .dll or .so file that is detected at run time. It is not necessary to relink the run time system.
Each Acu4GL product has its own license file, which must be located in the same directory as the ACUCOBOL-GT runtime. For DB2, the license file is distributed with the name runcbl.klc.