SCM_CLASS_BUILTIN  673 src/class.c        case SCM_CLASS_BUILTIN:  return SCM_SYM_BUILTIN;
SCM_CLASS_BUILTIN 2575 src/class.c        fp->flags = SCM_CLASS_BUILTIN;
SCM_CLASS_BUILTIN  529 src/gauche.h       SCM_CLASS_BUILTIN  = 0,
SCM_CLASS_BUILTIN  647 src/gauche.h                                SCM_CLASS_BUILTIN,           \