checklibc=True, headers='netinet/in.h arpa/nameser.h resolv.h dns.h')
conf.CHECK_VARIABLE('_res', headers='netinet/in.h arpa/nameser.h resolv.h')
conf.CHECK_DECLS('_res', headers='netinet/in.h arpa/nameser.h resolv.h')
-conf.CHECK_FUNCS_IN('openpty', 'util', checklibc=True, headers='pty.h util.h libutil.h')
conf.DEFINE('HAVE_KRB5',1)