Where'd you get your perl? Did it come with your OS? If so,
what OS/distribution is it? If not, did you compile it
yourself or get it as an external package?
Hey,
I grabbed the rpm of perl-base from mandrake 9, and
it indeed lacks perl.h. No worries -- it's part of
the perl-devel package (which you presumably don't
have installed). Go grab it here.