[RT_System - Thu Aug 29 04:16:16 2002]:

> when Compiling, the following error appears:
> 
>  make[3]: Entering directory /root/krb5-1.2.5/src/lib/rpc/unit-test'
>  gcc -L../../../lib -Wl,-rpath -Wl,/usr/lib -o client client.o
>  rpc_test_clnt.o \
>  -lgssrpc -ldyn -lgssapi_krb5 -lkrb5 -lk5crypto -lcom_err
>  ../../../lib/libkrb5.so: undefined reference to __dn_expand'
>  ../../../lib/libkrb5.so: undefined reference to __res_search'
>  collect2: ld returned 1 exit status
> the error does not happpen when enabling DNS access (--enable-dns).
> It happens with both versions of gcc 2.95.4 and 3.2
> 
> >How-To-Repeat:
> ./configure  --prefix=/usr --enable-shared '--with-ccopts=-O2
> -D_REENTRANT' --
> localstatedir=/etc --mandir=/usr/share/man --without-tcl
> --enable-dns=no
> make all

Did you remove config.cache before configuring with the --enable-dns=no
flag?  If not, that might explain the problem.  If you were doing the
./configure from a fresh source tree or on one that had config.cache
removed, then I would be interested in seeing your build log showing the
compiler command lines where lib/krb5/os/locate_kdc and
lib/krb5/os/hst_realm.c get compiled.

---Tom