Thanks to your quick response, I got libclc compiled successfully. Now when I try to view an image, the OpenCL compile error is different: <unknown>:0:0: in function ResizeHorizontalFilter void (float addrspace(1)*, i32, i32, i32, float addrspace(1)*, i32, i32, float, i32, i32, float addrspace(1)*, float, float, float, float, float addrspace(3)*, i32, i32, i32, <4 x float> addrspace(3)*, float addrspace(3)*, float addrspace(3)*): unsupported call to function applyResizeFilter I'd call that progress, certainly. applyResizeFilter is on line 78 of the kernel, and ResizeHorizontalFilter is on line 81.