If I understand to your problem correctly, you are missing the required BSP and the base design to support OpenCL development for your Arria V board.
For this problem, please check with the board vendor (customer support) for the availability of the two items.
To be able to develop under Altera OpenCL framework, you need to load a basic design file on to the flash ROM / configuration device on the board. This is to provide some necessary IP support for the basic PCIe and memory access. It is usually provided with the BSP from the board vendor.
Along with the basic design file, drivers should be included as well for your host to recognise the OpenCL device.
Until you sort out the above missing parts, your OpenCL development environment should be up and running. Good luck!