present but cannot be compiled

Hi, I'm new here.

I got following error when I configured xinetd with libwrap.
please help me.

configure: WARNING: rpc/pmap_clnt.h: present but cannot be compiled
configure: WARNING: rpc/pmap_clnt.h: check for missing prerequisite headers?
configure: WARNING: rpc/pmap_clnt.h: proceeding with the preprocessor's result
configure: WARNING:     ## ------------------------------------ ##
configure: WARNING:     ## Report this to [email protected]. ##
configure: WARNING:     ## ------------------------------------ ##

my enviroment is
netBSD1.6.1 
xinetd-2.3.12
gcc version 2.95.3 20010315 (release) (NetBSD nb3)


bash-2.05b# ./configure --with-libwrap
checking build system type... i386-unknown-netbsdelf1.6.1
checking host system type... i386-unknown-netbsdelf1.6.1
checking target system type... i386-unknown-netbsdelf1.6.1
checking for gcc... gcc
checking for C compiler default output... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables... 
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ANSI C... none needed
checking for a BSD-compatible install... /usr/bin/install -c
checking for ranlib... ranlib
checking for main in -lcompat... yes
checking for library containing gethostbyname... none required
checking for library containing getnameinfo... none required
checking for library containing inet_ntop... none required
checking for getnameinfo... yes
checking for inet_ntop... yes
checking for difftime... yes
checking for fcvt... no
checking for fcvt in -lm... no
checking for ecvt... no
checking for ecvt in -lm... no
checking for gcvt... no
checking for gcvt in -lm... no
checking for strerror... yes
checking for strcasecmp... yes
checking for socket... yes
checking for inet_aton... yes
checking for setenv... yes
checking for strsignal... yes
checking for sys_siglist in -lc... yes
checking for gai_strerror... yes
checking for freeaddrinfo... yes
checking for getaddrinfo... yes
checking how to run the C preprocessor... gcc -E
checking for egrep... grep -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking for sys/types.h... (cached) yes
checking sys/termios.h usability... yes
checking sys/termios.h presence... yes
checking for sys/termios.h... yes
checking termios.h usability... yes
checking termios.h presence... yes
checking for termios.h... yes
checking sys/ioctl.h usability... yes
checking sys/ioctl.h presence... yes
checking for sys/ioctl.h... yes
checking sys/select.h usability... yes
checking sys/select.h presence... yes
checking for sys/select.h... yes
checking rpc/rpc.h usability... yes
checking rpc/rpc.h presence... yes
checking for rpc/rpc.h... yes
checking rpc/rpcent.h usability... yes
checking rpc/rpcent.h presence... yes
checking for rpc/rpcent.h... yes
checking sys/file.h usability... yes
checking sys/file.h presence... yes
checking for sys/file.h... yes
checking ftw.h usability... no
checking ftw.h presence... no
checking for ftw.h... no
checking machine/reg.h usability... yes
checking machine/reg.h presence... yes
checking for machine/reg.h... yes
checking linux/time.h usability... no
checking linux/time.h presence... no
checking for linux/time.h... no
checking netdb.h usability... yes
checking netdb.h presence... yes
checking for netdb.h... yes
checking sys/resource.h usability... yes
checking sys/resource.h presence... yes
checking for sys/resource.h... yes
checking arpa/inet.h usability... yes
checking arpa/inet.h presence... yes
checking for arpa/inet.h... yes
checking grp.h usability... yes
checking grp.h presence... yes
checking for grp.h... yes
checking rpc/pmap_clnt.h usability... no
checking rpc/pmap_clnt.h presence... yes
configure: WARNING: rpc/pmap_clnt.h: present but cannot be compiled
configure: WARNING: rpc/pmap_clnt.h: check for missing prerequisite headers?
configure: WARNING: rpc/pmap_clnt.h: proceeding with the preprocessor's result
configure: WARNING:     ## ------------------------------------ ##
configure: WARNING:     ## Report this to [email protected]. ##
configure: WARNING:     ## ------------------------------------ ##
checking for rpc/pmap_clnt.h... yes
checking sys/socket.h usability... yes
checking sys/socket.h presence... yes
checking for sys/socket.h... yes
checking sys/signal.h usability... yes
checking sys/signal.h presence... yes
checking for sys/signal.h... yes
checking crypt.h usability... no
checking crypt.h presence... no
checking for crypt.h... no
checking for stdint.h... (cached) yes
checking stdbool.h usability... no
checking stdbool.h presence... no
checking for stdbool.h... no
checking sys/filio.h usability... yes
checking sys/filio.h presence... yes
checking for sys/filio.h... yes
checking DNSServiceDiscovery/DNSServiceDiscovery.h usability... no
checking DNSServiceDiscovery/DNSServiceDiscovery.h presence... no
checking for DNSServiceDiscovery/DNSServiceDiscovery.h... no
checking for uint16_t... yes
checking for uint32_t... yes
checking for uint64_t... yes
checking for uid_t... yes
checking for gid_t... yes
checking for socklen_t... yes
checking for rlim_t... yes
checking for struct addrinfo... yes
checking for struct in6_addr... yes
checking for struct sockaddr_in6... yes
checking for struct sockaddr_storage... yes
checking for crypt in -lc... no
checking for crypt in -lcrypt... yes
checking for log10 in -lm... yes
checking whether to default to ipv6... ignored
checking whether to use libwrap... yes
checking for request_init in -lwrap... no
checking for yp_get_default_domain in -lnsl... no
checking for stdlib.h... (cached) yes
checking for unistd.h... (cached) yes
checking for getpagesize... yes
checking for working mmap... yes
checking for isatty... yes
checking for memcpy... yes
checking for waitpid... yes
checking for sigvec... yes
checking for setsid... yes
checking for strftime... yes
configure: creating ./config.status
config.status: creating Makefile
config.status: creating libs/src/misc/Makefile
config.status: creating libs/src/pset/Makefile
config.status: creating libs/src/sio/Makefile
config.status: creating libs/src/str/Makefile
config.status: creating libs/src/xlog/Makefile
config.status: creating libs/src/portable/Makefile
config.status: creating xinetd/Makefile
config.status: creating config.h