gcc -o cngplp main.o mainwnd.o printerinfo.o load.o options.o -lgtk-x11-2.0 -lgdk-x11-2.0 -lpangocairo-1.0 -latk-1.0 -lcairo -lgdk_pixbuf-2.0 -lgio-2.0 -lpangoft2-1.0 -lpango-1.0 -lgobject-2.0 -lglib-2.0 -lfontconfig -lfreetype -lglade-2.0 -lgmodule-2.0 -lcups -Wl,-rpath -Wl,/usr/local/lib

Source: Compiling Canon printer driver? – Raspberry Pi Forums