I ran configure and it went fine, but when I try to compile, I get lots of error messages, such as;

perl.c:46:20: EXTERN.h: No such file or directory
perl.c:52:18: perl.h: No such file or directory
perl.c:53:18: XSUB.h: No such file or directory
perl.c:74: syntax error before "_"
In file included from perl.c:93:
perl-common.h:8:18: XSUB.h: No such file or directory
perl-common.h:9:20: EXTERN.h: No such file or directory
perl-common.h:10:18: perl.h: No such file or directory

There's a whole load more and I'm not sure what's actually wrong. Can anyone help?

What exactly are you trying to do? Compile perl? Maybe there was an early thread in which you answered this that I didn't see but.. otherwise, you should reply with more specific details.