...
make[3]: Entering directory `/home/yunkai/trafficserver/mgmt/api/include'
make[3]: Nothing to be done for `all'.
make[3]: Leaving directory `/home/yunkai/trafficserver/mgmt/api/include'
make[3]: Entering directory `/home/yunkai/trafficserver/mgmt/api'
CXXLD traffic_api_cli_remote
../../lib/ts/.libs/libtsutil.so: undefined reference to `__sync_fetch_and_sub_8'
../../lib/ts/.libs/libtsutil.so: undefined reference to `__sync_fetch_and_add_8'
collect2: ld returned 1 exit status
make[3]: *** [traffic_api_cli_remote] Error 1
make[3]: Leaving directory `/home/yunkai/trafficserver/mgmt/api'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/home/yunkai/trafficserver/mgmt/api'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/yunkai/trafficserver/mgmt'
make: *** [all-recursive] Error 1