make -C tools/testing/selftests TARGETS="net" TEST_PROGS=so_rcv_listener TTEST_GEN_PROGS="" run_tests
make: Entering directory '/home/virtme/testing-1/tools/testing/selftests'
make[1]: Entering directory '/home/virtme/testing-1/tools/testing/selftests/net'
make[1]: Nothing to be done for 'all'.
make[1]: Leaving directory '/home/virtme/testing-1/tools/testing/selftests/net'
make[1]: Entering directory '/home/virtme/testing-1/tools/testing/selftests/net'
TAP version 13
1..1
# timeout set to 3600
# selftests: net: so_rcv_listener
# 0.00 [+0.00] Usage: ./so_rcv_listener [opts] <dst host> <dst port / service>
# 0.00 [+0.00] Options:
# 0.00 [+0.00] -M val  Test SO_RCVMARK
# 0.00 [+0.00] -P val  Test SO_RCVPRIORITY
not ok 1 selftests: net: so_rcv_listener # exit=1
make[1]: Leaving directory '/home/virtme/testing-1/tools/testing/selftests/net'
make: Leaving directory '/home/virtme/testing-1/tools/testing/selftests'
xx__-> echo $?
0
xx__->