Any chance of making this more portable?

For me, this does not run out-of-the-box according to readme. I've tried to run this as-is and getting the following error
"TypeError: struct Lib3dsFile: field 'Lib3dsFile.shadow' is of an opaque type (not declared in cdef())"

I've downloaded a copy of the Lib3DS 1.3 C source as well.

any help would be appreciated.