nagios-plug-1.4.16 Compile on ubuntu 13.04 error

jack@ubuntu:~/nagios-plugins-1.4.16$ sudo make
make all-recursive
make[1]: Entering directory `/home/jack/nagios-plugins-1.4.16'
Making all in gl
make[2]: Entering directory `/home/jack/nagios-plugins-1.4.16/gl'
rm -f configmake.h-t && \
 { echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
   echo '#define PREFIX "/usr/local/nagios"'; \
   echo '#define EXEC_PREFIX "/usr/local/nagios"'; \
   echo '#define BINDIR "/usr/local/nagios/bin"'; \
   echo '#define SBINDIR "/usr/local/nagios/sbin"'; \
   echo '#define LIBEXECDIR "/usr/local/nagios/libexec"'; \
   echo '#define DATAROOTDIR "/usr/local/nagios/share"'; \
   echo '#define DATADIR "/usr/local/nagios/share"'; \
   echo '#define SYSCONFDIR "/usr/local/nagios/etc"'; \
   echo '#define SHAREDSTATEDIR "/usr/local/nagios/com"'; \
   echo '#define LOCALSTATEDIR "/usr/local/nagios/var"'; \
   echo '#define INCLUDEDIR "/usr/local/nagios/include"'; \
   echo '#define OLDINCLUDEDIR "/usr/include"'; \
   echo '#define DOCDIR "/usr/local/nagios/share/doc/nagios-plugins"'; \
   echo '#define INFODIR "/usr/local/nagios/share/info"'; \
   echo '#define HTMLDIR "/usr/local/nagios/share/doc/nagios-plugins"'; \
   echo '#define DVIDIR "/usr/local/nagios/share/doc/nagios-plugins"'; \
   echo '#define PDFDIR "/usr/local/nagios/share/doc/nagios-plugins"'; \
   echo '#define PSDIR "/usr/local/nagios/share/doc/nagios-plugins"'; \
   echo '#define LIBDIR "/usr/local/nagios/lib"'; \
   echo '#define LISPDIR ""'; \
   echo '#define LOCALEDIR "/usr/local/nagios/share/locale"'; \
   echo '#define MANDIR "/usr/local/nagios/share/man"'; \
   echo '#define MANEXT ""'; \
   echo '#define PKGDATADIR "/usr/local/nagios/share/nagios-plugins"'; \
   echo '#define PKGINCLUDEDIR "/usr/local/nagios/include/nagios-plugins"'; \
   echo '#define PKGLIBDIR "/usr/local/nagios/lib/nagios-plugins"'; \
   echo '#define PKGLIBEXECDIR "/usr/local/nagios/libexec/nagios-plugins"'; \
 } | sed '/""/d' > configmake.h-t && \
 if test -f configmake.h && cmp configmake.h-t configmake.h > /dev/null; then \
   rm -f configmake.h-t; \
 else \
   rm -f configmake.h; mv configmake.h-t configmake.h; \
 fi
make all-recursive
make[3]: Entering directory `/home/jack/nagios-plugins-1.4.16/gl'
make[4]: Entering directory `/home/jack/nagios-plugins-1.4.16/gl'
gcc -DHAVE_CONFIG_H -I. -I.. -I../intl -g -O2 -MT base64.o -MD -MP -MF .deps/base64.Tpo -c -o base64.o base64.c
mv -f .deps/base64.Tpo .deps/base64.Po
gcc -DHAVE_CONFIG_H -I. -I.. -I../intl -g -O2 -MT close-hook.o -MD -MP -MF .deps/close-hook.Tpo -c -o close-hook.o close-hook.c
mv -f .deps/close-hook.Tpo .deps/close-hook.Po
gcc -DHAVE_CONFIG_H -I. -I.. -I../intl -g -O2 -MT exitfail.o -MD -MP -MF .deps/exitfail.Tpo -c -o exitfail.o exitfail.c
mv -f .deps/exitfail.Tpo .deps/exitfail.Po
gcc -DHAVE_CONFIG_H -I. -I.. -I../intl -g -O2 -MT full-read.o -MD -MP -MF .deps/full-read.Tpo -c -o full-read.o full-read.c
mv -f .deps/full-read.Tpo .deps/full-read.Po
gcc -DHAVE_CONFIG_H -I. -I.. -I../intl -g -O2 -MT full-write.o -MD -MP -MF .deps/full-write.Tpo -c -o full-write.o full-write.c
mv -f .deps/full-write.Tpo .deps/full-write.Po
gcc -DHAVE_CONFIG_H -I. -I.. -I../intl -g -O2 -MT localcharset.o -MD -MP -MF .deps/localcharset.Tpo -c -o localcharset.o localcharset.c
In file included from localcharset.c:28:0:
./stdio.h:456:1: error: ‘gets’ undeclared here (not in a function)
make[4]: *** [localcharset.o] Error 1
make[4]: Leaving directory `/home/jack/nagios-plugins-1.4.16/gl'
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory `/home/jack/nagios-plugins-1.4.16/gl'
make[2]: *** [all] Error 2
make[2]: Leaving directory `/home/jack/nagios-plugins-1.4.16/gl'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/jack/nagios-plugins-1.4.16'
make: *** [all] Error 2