> >I have downloaded the latest Libpcap and Tcpdump source files. Libpcap was
> >a very clean install. Tcpdump had this one warning message:
> 
>       could you tell us which platform are you using?

Probably Linux.  For some reason, the configure script prefers
"sigset()" to "sigaction()", even on platforms - such as most if not all
Linux distributions - which have both.  (There's a comment, in fact,
that says "prefer sigset() to sigaction()".)

At least on one Linux distribution here, it appears you have to define
__USE_UNIX98 to get "sigset()" declared.

Can anybody think of a compelling reason to prefer "sigset()" to
"sigaction()" on platforms that have both?  If not, we should probably
just change the configure script *not* to prefer sigaction.
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