It's a bit hard for me to really know without going through the process myself. (I'm not familiar with the finer points of ExtUtils::PkgConfig.) From where did you get the ppm package that you installed ? Also from where did you get the requisite C libraries ?
I'll try to install the same stuff and see if I can work out what's going wrong.
I would try commenting that line out ... then re-run 'perl Makefile.PL' and see what happens. If the makefile gets written, run 'dmake' and see how it all goes.