[ILUG] C question...

[John P . Looney]

 Yet another wierd C question. Why me ?

 I'm trying to compile up the Netrek server, and on this line:

    stats->di != htonl(pl->p_stats.st_di) ||

 I'm getting:
socket.c:766: invalid operands to binary &

 So, it looks like it's expanding ntonl, and then barfing. In other code,
there is the line:

#ifndef BAD_SVR4_HACKS
    pkt.milliDI = htonl(1000 * ranks[i].di);
#else /* Unixware/IRIX requires explicit casts */
      /* this next define will make the next more readable */
#define BAD_SVR4_HACKS_CAST(a,b) (unsigned long)( (long double)a * (long double)b )
    pkt.milliDI = htonl( BAD_SVR4_HACKS_CAST( 1000, ranks[i].di ) );
#endif

 I define'd BAD_SVR4_HACKS in the other stuff, to get it working, but there
are no such hacks in this other (failing) code. The odd thing is, that it
only fails when optimisations are turned on; could have something to do
with:

(from /usr/include/netinet/in.h)

# if __BYTE_ORDER == __LITTLE_ENDIAN && defined __OPTIMIZE__
#  define ntohl(x)      __bswap_32 (x)
#  define ntohs(x)      __bswap_16 (x)
#  define htonl(x)      __bswap_32 (x)
#  define htons(x)      __bswap_16 (x)
# endif

 Urk. Any flags I can give the compiler, to get it to compile this ?

Kate

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