The change to do argument process before EAL init broke the support of select-interface option. Fix by setting flag and doing select-interface later. Fixes: a8dde09f97df ("app/dumpcap: allow help/version without primary process") Cc: stable@dpdk.org Signed-off-by: Arshdeep Kaur <arshdeep.kaur@intel.com> Acked-by: Stephen Hemminger <stephen@networkplumber.org>