message: Allow custom directory for output .spv in ispc.cmake
diff: @@ -237,7 +237,12 @@ macro (ispc_compile_gpu parent_target output_prefix)
  message(STATUS "ISPC-GPU source file to be compiled: ${src}")
  set(input ${CMAKE_CURRENT_LIST_DIR}/${dir}/${fname}.ispc)
  - set(outdir ${CMAKE_BINARY_DIR})
  +
  + if (NOT ISPC_TARGET_DIR)
  + set(ISPC_TARGET_DIR ${CMAKE_BINARY_DIR})
  + endif()
  +
  + set(outdir ${ISPC_TARGET_DIR})
  set(result "${outdir}/${output_prefix}${fname}.spv")
  