[Olsr-dev] [PATCH] plugins: fix build with musl

[Daniel Golle]

Hi!

On Fri, May 15, 2015 at 10:50:24PM +0200, Henning Rogge wrote:
> Wow,
> 
> this was A LOT of activity...
> 
> is there a special reason why musl does not use the same headers as
> the other libraries?

The conflicting definitions seem to stem from *BSD vs. GNU systems.
glibc defines them both:
--- netinet/udp.h
/* UDP header as specified by RFC 768, August 1980. */

struct udphdr
{
  __extension__ union
  {
    struct
    {
      u_int16_t uh_sport;               /* source port */
      u_int16_t uh_dport;               /* destination port */
      u_int16_t uh_ulen;                /* udp length */
      u_int16_t uh_sum;         /* udp checksum */
    };
    struct
    {
      u_int16_t source;
      u_int16_t dest;
      u_int16_t len;
      u_int16_t check;
    };
  };
};
---

Various libc's found in the wild define either or both definitions.
'uh_sport' is more intuitive than 'source' which could mean a lot
of things imho.


Cheers


Daniel