Scm_BignumAddN   2065 src/gauche.h   SCM_EXTERN ScmObj Scm_BignumAddN(ScmBignum *bx, ScmObj args);
Scm_BignumAddN    922 src/number.c               return Scm_BignumAddN(SCM_BIGNUM(arg0), Scm_Cons(arg1, args));