Hi I am trying to use perl XS in RHEL 5. but simple programm is giving error.I followed same code as in Example 1 in perldoc perlxstut

Can anyone help me in correcting the following error?

[root@localhost Mytest]# 
[root@localhost Mytest]# pwd
/home/nikole/perlcode/Mytest
[root@localhost Mytest]# ls
blib     lib          MANIFEST  Mytest.xs   pm_to_blib  README
Changes  Makefile.PL  Mytest.c  Mytest.xsc  ppport.h    t
[root@localhost Mytest]# perl Makefile.PL 
Checking if your kit is complete...
Looks good
Writing Makefile for Mytest
[root@localhost Mytest]# 
[root@localhost Mytest]# 
[root@localhost Mytest]# make
/usr/bin/perl /usr/lib/perl5/5.8.8/ExtUtils/xsubpp  -typemap /usr/lib/perl5/5.8.8/ExtUtils/typemap  Mytest.xs > Mytest.xsc && mv Mytest.xsc Mytest.c
Error: Cannot parse function definition from '    hello()' in Mytest.xs, line 9
Please specify prototyping behavior for Mytest.xs (see perlxs manual)
make: *** [Mytest.c] Error 1
[root@localhost Mytest]# 

Thanks