make -C libipvs
make[1]: Entering directory '/build/ipvsadm/src/ipvsadm-1.31/libipvs'
gcc -Wall -Wunused -Wstrict-prototypes -g -fPIC -DLIBIPVS_USE_NL   -DHAVE_NET_IP_VS_H -DFALLBACK_LIBNL1 -c -o libipvs.o libipvs.c
libipvs.c: In function ‘ipvs_nl_message’:
libipvs.c:66:26: error: ‘NL_AUTO_PORT’ undeclared (first use in this function); did you mean ‘NL_AUTO_PID’?
   66 |         genlmsg_put(msg, NL_AUTO_PORT, NL_AUTO_SEQ, family, 0, flags,
      |                          ^~~~~~~~~~~~
      |                          NL_AUTO_PID
libipvs.c:66:26: note: each undeclared identifier is reported only once for each function it appears in
libipvs.c: In function ‘ipvs_nl_err_cb’:
libipvs.c:87:17: warning: implicit declaration of function ‘nl_syserr2nlerr’ [-Wimplicit-function-declaration]
   87 |         return -nl_syserr2nlerr(nlerr->error);
      |                 ^~~~~~~~~~~~~~~
libipvs.c: In function ‘ipvs_nl_send_message’:
libipvs.c:117:13: warning: implicit declaration of function ‘nl_socket_modify_err_cb’; did you mean ‘nl_socket_modify_cb’? [-Wimplicit-function-declaration]
  117 |         if (nl_socket_modify_err_cb(sock, NL_CB_CUSTOM, ipvs_nl_err_cb,
      |             ^~~~~~~~~~~~~~~~~~~~~~~
      |             nl_socket_modify_cb
make[1]: *** [Makefile:39: libipvs.o] Error 1
make[1]: Leaving directory '/build/ipvsadm/src/ipvsadm-1.31/libipvs'
make: *** [Makefile:87: libs] Error 2
==> ERROR:(B A failure occurred in build().(B
    Aborting...(B