}
close PLOUT or die "Couldn't close filehandle writing to patchlevel.new : $!";
close PLIN or die "Couldn't close filehandle reading from patchlevel.h : $!";
+close DATA; # needed to allow unlink to work win32.
unlink "patchlevel.bak" or warn "Couldn't unlink patchlevel.bak : $!"
if -e "patchlevel.bak";
rename "patchlevel.h", "patchlevel.bak" or