#define CFG_USED(type, name, stuff) \
        { .compFunc = compare_ ## type; /* */ },
#define CFG_UNUSED(type, name, stuff)   /* unused */

#define CFG_ADD(type, name, stuff)  CFG_USE_ ## type (type,name,stuff)

#ifdef USING_int
#define CFG_USE_int CFG_USED
#else
#define CFG_USE_int CFG_UNUSED
#endif