\begin{lstlisting}
$ export CPPFLAGS="-I/path/to/gnunet/headers"
$ export LDFLAGS="-L/path/to/gnunet/libraries"
-$ gcc -o testbed-test testbed_test.c -lgnunettestbed -lgnunetdht -lgnunetutil
+$ gcc $CPPFLAGS $LDFLAGS -o testbed-test testbed_test.c -lgnunettestbed -lgnunetdht -lgnunetutil
\end{lstlisting}
The \texttt{CPPFLAGS} and \texttt{LDFLAGS} are necessary if GNUnet is installed
into a different directory other than \texttt{/usr/local}.