A 3GL procedure is a procedure written in a third-generation language, such as C, that you can call by name from a script or 4GL procedure. 3GL procedures are used to perform operations that are outside the scope of OpenROAD but are available from a 3GL.

You maintain and compile 3GL procedures outside of OpenROAD. For more information about how to register 3GL procedures in an application, see the Workbench User Guide.

The following subsections describe how to declare parameters for 3GL procedures. They also provide language-specific information about coding the procedures. For more information about calling 3GL procedures, see Using 3GL in Your Application (see Using 3GL in Your Application).