```
$ bmake
=> Bootstrap dependency digest>=20010302: found digest-20190127
===> Building for bitcoin-0.20.1nb3
Making all in src
gmake[1]: Entering directory '/home/pbulk/build/finance/bitcoin/work/bitcoin-0.20.1/src'
gmake[2]: Entering directory '/home/pbulk/build/finance/bitcoin/work/bitcoin-0.20.1/src'
gmake[3]: Entering directory '/home/pbulk/build/finance/bitcoin/work/bitcoin-0.20.1'
gmake[3]: Leaving directory '/home/pbulk/build/finance/bitcoin/work/bitcoin-0.20.1'
  CXXLD    bitcoin-tx
Undefined                       first referenced
 symbol                             in file
freeifaddrs                         libbitcoin_util.a(libbitcoin_util_a-randomenv.o)
getifaddrs                          libbitcoin_util.a(libbitcoin_util_a-randomenv.o)
ld: fatal: symbol referencing errors. No output written to .libs/bitcoin-tx
collect2: error: ld returned 1 exit status
gmake[2]: *** [Makefile:7355: bitcoin-tx] Error 1
gmake[2]: Leaving directory '/home/pbulk/build/finance/bitcoin/work/bitcoin-0.20.1/src'
gmake[1]: *** [Makefile:17263: all-recursive] Error 1
gmake[1]: Leaving directory '/home/pbulk/build/finance/bitcoin/work/bitcoin-0.20.1/src'
gmake: *** [Makefile:782: all-recursive] Error 1
*** Error code 2

Stop.
bmake[1]: stopped in /data/pkgsrc/finance/bitcoin
*** Error code 1
```

I found [this](https://github.com/pydron/ifaddr/issues/23), which seems to be the same issue, but on a Python context.

Previous issues with compiling on Illumos seem to have been sorted out (#15708 & more), but now it's stuck here.
if (node.nSendOffset == data.size()) {
                node.nSendOffset = 0;
                node.nSendSize -= data.size();
                node.fPauseSend = node.nSendSize > nSendBufferMaxSize;
                it++;
            } else {
                
                break;
            }
        } else {
            if (nBytes < 0) {
                
                int nErr = WSAGetLastError();
                if (nErr != WSAEWOULDBLOCK && nErr != WSAEMSGSIZE && nErr != WSAEINTR && nErr != WSAEINPROGRESS) {
                    LogPrint(BCLog::NET, "socket send error for peer=%d: %s\n", node.GetId(), NetworkErrorString(nErr));
                    node.CloseSocketDisconnect();
                }
            }
            
            break;
        }
    }
    if (it == node.vSendMsg.end()) {
        assert(node.nSendOffset == 0);
        assert(node.nSendSize == 0);
    }
    node.vSendMsg.erase(node.vSendMsg.begin(), it);
    return nSentSize;
}
static bool ReverseCompareNodeMinPingTime(const NodeEvictionCandidate &a, const NodeEvictionCandidate &b)