pahole: Add --structs to ask just for structs, counterpart of --unions

The default is to show structs and unions, if just structs should be
considered, use --structs, just don't use it together with --unions or
nothing will be shown 8-)

  $ pahole --find_pointers_to ehci_qh
  ehci_hcd: qh_scan_next
  ehci_hcd: async
  ehci_hcd: dummy
  ehci_shadow: qh
  $ pahole --structs --find_pointers_to ehci_qh
  ehci_hcd: qh_scan_next
  ehci_hcd: async
  ehci_hcd: dummy
  $ pahole --unions --find_pointers_to ehci_qh
  ehci_shadow: qh
  $ pahole --structs --unions --find_pointers_to ehci_qh
  $

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 files changed