without function descriptors (sets ELF header flag
			  EF_IA_64_NOFUNCDESC_CONS_GP)
  -milp32|-milp64|-mlp64|-mp64	select data model (default -mlp64)
  -mle | -mbe		  select little- or big-endian byte order (default -mle)
  -mtune=[itanium1|itanium2]
			  tune for a specific CPU (default -mtune=itanium2)
  -munwind-check=[warning|error]
			  unwind directive check (default -munwind-check=warning)
  -mhint.b=[ok|warning|error]
			  hint.b check (default -mhint.b=error)
  -x | -xexplicit	  turn on dependency violation checking