netinet/if_ether.h warnings

[Matt Selsky <selsky () columbia edu>]

I'm building nmap-3.10ALPHA2 on solaris8 with gcc-3.2 and I get the 
following warning during ./configure (it still compiled successfully):

WARNING: netinet/if_ether.h: present but cannot be compiled
WARNING: netinet/if_ether.h: check for missing prerequisite headers?
WARNING: netinet/if_ether.h: proceeding with the preprocessor's result

I poked around in config.log and found this:

configure:4083: checking netinet/if_ether.h usability
configure:4092: gcc -c -g -O2  conftest.c >&5
In file included from 
/opt/gcc-3.2/lib/gcc-lib/sparc-sun-solaris2.8/3.2/include/netinet/if_ether.h:37,
                 from configure:4120:
/usr/include/net/if_arp.h:61: field `arp_pa' has incomplete type
/usr/include/net/if_arp.h:62: field `arp_ha' has incomplete type
/usr/include/net/if_arp.h:64: confused by earlier errors, bailing out

It is complaining about sockaddr not being defined:

struct arpreq {
        struct  sockaddr arp_pa;                /* protocol address */
        struct  sockaddr arp_ha;                /* hardware address */
        int     arp_flags;                      /* flags */
};

sockaddr is defined in /usr/include/sys/socket.h  Should nmap be 
including that header when trying to use netinet/if_ether.h?

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