SCM_WRITE_SHARED 1583 src/gauche.h       SCM_WRITE_SHARED = 2,       /* write/ss mode   */
SCM_WRITE_SHARED   96 src/repl.c                 Scm_Write(SCM_CAR(cp), SCM_OBJ(SCM_CUROUT), SCM_WRITE_SHARED);
SCM_WRITE_SHARED  161 src/write.c        if (SCM_WRITE_MODE(&ctx) == SCM_WRITE_SHARED) {