make -C tools/testing/selftests TARGETS="net/packetdrill" TEST_PROGS=<n_field_updates_opt.pkt TEST_GEN_PROGS="" run_tests                        
make: Entering directory '/srv/vmksft/testing/wt-7/tools/testing/selftests'
make[1]: Nothing to be done for 'all'.
TAP version 13
1..1
# timeout set to 45
# selftests: net/packetdrill: tcp_accecn_ecn_field_updates_opt.pkt
# TAP version 13
# 1..2
# ok 1 ipv4
# ok 2 ipv6
# # Totals: pass:2 fail:0 xfail:0 xpass:0 skip:0 error:0
ok 1 selftests: net/packetdrill: tcp_accecn_ecn_field_updates_opt.pkt
make: Leaving directory '/srv/vmksft/testing/wt-7/tools/testing/selftests'
xx__-> echo $?
0
xx__->