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#############################
#Sourced from:
#https://raw.githubusercontent.com/jwetzl/CudaLBFGS/master/CheckComputeCapability.cmake
#############################
# Check for GPUs present and their compute capability
# based on http://stackoverflow.com/questions/2285185/easiest-way-to-test-for-existence-of-cuda-capable-gpu-from-cmake/2297877#2297877 (Christopher Bruns)
IF(CUDA_FOUND)
MESSAGE(STATUS "${CMAKE_MODULE_PATH}/cuda_compute_capability.cpp")
TRY_RUN(RUN_RESULT_VAR COMPILE_RESULT_VAR
${CMAKE_BINARY_DIR}
${CMAKE_MODULE_PATH}/cuda_compute_capability.cpp
CMAKE_FLAGS
-DINCLUDE_DIRECTORIES:STRING=${CUDA_TOOLKIT_INCLUDE}
-DLINK_LIBRARIES:STRING=${CUDA_CUDART_LIBRARY}
COMPILE_OUTPUT_VARIABLE COMPILE_OUTPUT_VAR
RUN_OUTPUT_VARIABLE RUN_OUTPUT_VAR)
MESSAGE(STATUS "CUDA Compute Detection Output: ${RUN_OUTPUT_VAR}")
MESSAGE(STATUS "CUDA Compute Detection Return: ${RUN_RESULT_VAR}")
# COMPILE_RESULT_VAR is TRUE when compile succeeds
# Check Return Value of main() from RUN_RESULT_VAR
# RUN_RESULT_VAR is 0 when a GPU is found
# RUN_RESULT_VAR is 1 when errors occur
IF(COMPILE_RESULT_VAR AND RUN_RESULT_VAR EQUAL 0)
MESSAGE(STATUS "CUDA Compute Detection Worked")
# Convert output into a list of computes
STRING(REPLACE " " ";" COMPUTES_DETECTED_LIST ${RUN_OUTPUT_VAR})
SET(CUDA_HAVE_GPU TRUE CACHE BOOL "Whether CUDA-capable GPU is present")
ELSE()
MESSAGE(STATUS "CUDA Compute Detection Failed")
SET(CUDA_HAVE_GPU FALSE CACHE BOOL "Whether CUDA-capable GPU is present")
ENDIF()
ENDIF(CUDA_FOUND)
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