Hi,
This comes from:
https://lists.debian.org/debian-hurd/2023/11/msg00030.html
I was trying to build the dhcpcd package on the Hurd and it fails with
this error:
```
In file included from arp.h:46,
from privsep.h:134,
from dhcpcd.h:96,
from common.c:40:
if.h:36:10: fatal error: netinet/in_var.h: No such file or directory
36 | #include <netinet/in_var.h> /* for IN_IFF_TENTATIVE et all */
| ^~~~~~~~~~~~~~~~~~
```
Source:
https://salsa.debian.org/debian/dhcpcd/-/blob/upstream/10.1.0/src/if.h?ref_type=tags#L36
It fails because apparently we define the `BSD` macro. I checked it and
it comes from glibc:
https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/mach/hurd/bits/param.h;h=48eeb7ddf5d62942d15705e0bcc19db05ed28fc7;hb=HEAD#l63
So, according to the comment above the macro definition, we claim to be
compatible with BSD, is that still true?
dchpcd reads the `BSD` macro from multiple places across its codebase.
If it fails to compile, it's because we are not compatible apparently.
How can we fix this?
