Added missing version define for OpenCL

Author: Vedran Miletić

cmake/gmxManageOpenCL.cmake

@@ -74,6 +74,8 @@ elseif(NOT GMX_GPU_FFT_CLFFT)
 endif()
 
 add_definitions(${OpenCL_DEFINITIONS})
+math(EXPR REQUIRED_OPENCL_MIN_VERSION_DEF "100 * ${REQUIRED_OPENCL_MIN_VERSION_MAJOR} + 10 * ${REQUIRED_OPENCL_MIN_VERSION_MINOR}" OUTPUT_FORMAT DECIMAL)
+add_definitions("-DCL_TARGET_OPENCL_VERSION=${REQUIRED_OPENCL_MIN_VERSION_DEF}")
 
 include_directories(SYSTEM ${OpenCL_INCLUDE_DIRS})