ctf_add_union
if ((id = ctf_add_union(mdb.m_synth, CTF_ADD_ROOT, name)) ==
base = ctf_add_union(cup->cu_ctfp, isroot, name);
suid = ctf_add_union(cmp->cm_out, flags, name);
type = ctf_add_union(ctfp, flag, name);
extern ctf_id_t ctf_add_union(ctf_file_t *, uint_t, const char *);