Comment # 6 on bug 985386 from Atri Bhattacharya

Thanks Detlef,
I figured as much, and managed to fix this on vtk's side by using the following
patch:

Index: VTK-7.0.0/Filters/StatisticsGnuR/vtkRInterface.cxx
===================================================================
--- VTK-7.0.0.orig/Filters/StatisticsGnuR/vtkRInterface.cxx
+++ VTK-7.0.0/Filters/StatisticsGnuR/vtkRInterface.cxx
@@ -44,6 +47,11 @@ vtkStandardNewMacro(vtkRInterface);
 #ifndef WIN32
 #define CSTACK_DEFNS
 #define R_INTERFACE_PTRS
+// uintptr_t is already a defined datatype in stdint.h.
+// Rinterface.h also defines when the HAVE_UINTPTR_T macro is undefined.
+// Prevent redefinition of uintptr_t by explicitly defining HAVE_UINTPTR_T
+// before calling Rinterface.h.
+#define HAVE_UINTPTR_T
 #include "Rinterface.h"
 #endif