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# FindOCLHeaders
#
# If successful, will define::
#
# OCL_INCLUDE_DIR - Set to where CL/cl.h was found
# OCL_VERSION_STRING - Version of the OpenCL Headers "[Major].[minor]"
#
include(CheckSymbolExists)
find_path(OCL_INCLUDE_DIR NAMES CL/cl.h PATHS /usr/include )
set(REQUIRED_VERSION "1_2")
if (${OCL_INCLUDE_DIR} STREQUAL "OCL_INCLUDE_DIR-NOTFOUND")
message(STATUS "Please install opencl-headers package for version ${REQUIRED_VERSION}")
message(FATAL_ERROR "ERROR: Unable to find installed OpenCL Headers")
endif()
set(CMAKE_REQUIRED_INCLUDES "${OpenCL_INCLUDE_DIR}")
CHECK_SYMBOL_EXISTS(CL_VERSION_${REQUIRED_VERSION} "${OCL_INCLUDE_DIR}/CL/cl.h"
OPENCL_VERSION_${VERSION})
if(OPENCL_VERSION_${VERSION})
string(REPLACE "_" "." REQUIRED_VERSION "${REQUIRED_VERSION}")
set(OCL_VERSION_STRING ${REQUIRED_VERSION} )
endif()
MESSAGE(STATUS "OpenCL Headers: Path: ${OCL_INCLUDE_DIR}; Version: ${OCL_VERSION_STRING}")
if ("${OCL_VERSION_STRING}" STREQUAL "" OR NOT "${OCL_VERSION_STRING}" STREQUAL "${REQUIRED_VERSION}")
message(FATAL_ERROR "ERROR: expected OpenCL Headers version ${REQUIRED_VERSION}")
endif()
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