Re: Bug#256669: e2fsprogs: FTBFS(hurd-i386): uses undefined struct sockaddr_dl

[Ognyan Kulev <ogi@fmi.uni-sofia.bg>]

Theodore Ts'o wrote:
> We do try using SIOCGIFWHADDR; but it's not being defined apparently
> given the header files we're including.  
>
> If you could take a look at gen_uuid.c (attached) and tell me what I'm
> doing wrong for the Hurd.

AF_LINK is defined unconditionally in glibc, along with all other 
address/protocol families (libc/sysdeps/generic/bits/socket.h is used). 
 If generic defines all possible address families, I conclude that 
defined AF_LINK doesn't mean that it's implemented.

So it's best if you have configure check whether struct sockaddr_dl is 
defined, instead of checking for AF_LINK.  Perhaps AC_CHECK_TYPE?

Regards,
ogi