Programs using the PBC library should include the file pbc.h:

#include <pbc.h>

and linked against the PBC library, e.g.

$ gcc program.c -L. -lpbc

The file pbc.h includes gmp.h thus all GMP functions are available.

To catch certain bugs, first define the PBC_DEBUG symbol before including pbc.h:

#define PBC_DEBUG
#include <pbc.h>

The program will now abort when PBC detects a statement incorrectly mixing elements from different algebraic structures. Note these checks are performed at runtime, so this feature should be disabled for production builds.