[Exim] Problem with Exim build

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Hi All,

    Please help me. I can't build the exim becase the makes gives back this result on my Linux system (i686). I don't know what i have to do for the the right install.

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gcc -o exim  accept.o child.o daemon.o dbfn.o debug.o deliver.o direct.o directory.o dns.o drtables.o exim.o expand.o filter.o globals.o header.o host.o log.o match.o moan.o os.o parse.o queue.o readconf.o retry.o rewrite.o route.o search.o smtp_in.o smtp_out.o spool_in.o spool_out.o store.o string.o tls.o tod.o transport.o tree.o verify.o  version.o \
  libident/libident.a pcre/libpcre.a directors/directors.a \
  routers/routers.a transports/transports.a lookups/lookups.a \
  auths/auths.a \
  -lnsl -lcrypt     \
  -ldb -lresolv
dns.o: In function `dns_init':
dns.o(.text+0x10): undefined reference to `res_init'
collect2: ld returned 1 exit status
make[1]: *** [exim] Error 1
make[1]: Leaving directory `/root/install/exim/build-Linux-i386'
make: *** [go] Error 2
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Thanks: Bela
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