problemas para instalar qmail

estou usando slackware 10.1 e instalando qmail mas qndo dou o comando
ele retorna este erro
root@tigre:/usr/local/src/qmail-1.03# make setup check
./load qmail-remote control.o constmap.o timeoutread.o \
timeoutwrite.o timeoutconn.o tcpto.o now.o dns.o ip.o \
ipalloc.o ipme.o quote.o ndelay.a case.a sig.a open.a \
lock.a seek.a getln.a stralloc.a alloc.a substdio.a error.a \
str.a fs.a auto_qmail.o `cat dns.lib` `cat socket.lib`
dns.o(.text+0x124): In function `resolve':
: undefined reference to `_res'
dns.o(.text+0x134): In function `resolve':
: undefined reference to `_res'
dns.o(.text+0x15f): In function `resolve':
: undefined reference to `_res'
dns.o(.text+0x1d2): In function `resolve':
: undefined reference to `dn_expand'
dns.o(.text+0x2af): In function `findname':
: undefined reference to `dn_expand'
dns.o(.text+0x34a): In function `findname':
: undefined reference to `dn_expand'
dns.o(.text+0x3bf): In function `findip':
: undefined reference to `dn_expand'
dns.o(.text+0x4db): In function `findmx':
: undefined reference to `dn_expand'
dns.o(.text+0x58c): more undefined references to `dn_expand' follow
dns.o(.text+0x5b7): In function `dns_init':
: undefined reference to `res_init'
dns.o(.text+0x5c8): In function `dns_init':
: undefined reference to `res_search'
dns.o(.data+0x0): undefined reference to `res_query'
collect2: ld returned 1 exit status
make: *** [qmail-remote] Error 1