build errors on Fedora 24 and CentOS 7

[Lukas Pirl]

(@Brian: now with the list in CC and a note regarding reaching 10.10.…)

Thanks for all the explanations.

On 10/10/2016 04:08 PM, Brian Warner wrote as excerpted:
> If ip/ifconfig is broken entirely, it might still be getting
> 10.10.1.14 from the UDP socket routine.

If that is the case, that would explain it. But wait, both hosts can
also loopback-connect to themselves using the 10.10.… address
(respectively).

For the record, on both host `ifconfig` is not available and
`localhost` resolves to 127.0.0.1 (and not 10.10.…).

> Hmm. What's the full output of "/bin/ip addr" on that box?

Please see attached (avoids line wraps).

Best,

Lukas

-------------- next part --------------
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
6: eth0 at if7: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP qlen 1000
    link/ether 00:ff:aa:00:00:13 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 10.10.1.13/8 brd 10.255.255.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::2ff:aaff:fe00:13/64 scope link 
       valid_lft forever preferred_lft forever
-------------- next part --------------
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
8: eth0 at if9: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 00:ff:aa:00:00:14 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 10.10.1.14/8 brd 10.255.255.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::2ff:aaff:fe00:14/64 scope link 
       valid_lft forever preferred_lft forever