After the saved state containing the Prolog predicates and the
interface declarations has been created, a C program can access those
predicates by using the C functions described in the following
sections. Your C program that uses these functions should
#include the file IPC/RPC/ccallqp.h to include the extern
definitions. The final linker step that creates the main executable
must include the file IPC/RPC/system/ccallqp.o. This file
contains the C object code that implements the C functions you will be
using, and was created at the time your Quintus Prolog system was installed.
See the RPC demo for an example.