19#if !defined(__CYGWIN__) && defined(__GNUC__) && !defined(__MINGW32__)
20#define INTERNAL __attribute__((visibility("hidden")))
INTERNAL int polyOverlap(Point, Poly *, Point, Poly *)
INTERNAL void polyFree(void)
INTERNAL void breakPoly(Poly *)
INTERNAL int makeAddPoly(Poly *, Agnode_t *, double, double)
INTERNAL int makePoly(Poly *, Agnode_t *, double, double)