##============================================================================ ## Copyright (c) Kitware, Inc. ## All rights reserved. ## See LICENSE.txt for details. ## ## This software is distributed WITHOUT ANY WARRANTY; without even ## the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ## PURPOSE. See the above copyright notice for more information. ##============================================================================ # function(vtkm_extract_real_library library real_library) if(NOT UNIX) set(${real_library} "${library}" PARENT_SCOPE) return() endif() #Read in the first 4 bytes and see if they are the ELF magic number set(_elf_magic "7f454c46") file(READ ${library} _hex_data OFFSET 0 LIMIT 4 HEX) if(_hex_data STREQUAL _elf_magic) #we have opened a elf binary so this is what #we should link too set(${real_library} "${library}" PARENT_SCOPE) return() endif() file(READ ${library} _data OFFSET 0 LIMIT 1024) if("${_data}" MATCHES "INPUT \\(([^(]+)\\)") #extract out the so name from REGEX MATCh command set(_proper_so_name "${CMAKE_MATCH_1}") #construct path to the real .so which is presumed to be in the same directory #as the input file get_filename_component(_so_dir "${library}" DIRECTORY) set(${real_library} "${_so_dir}/${_proper_so_name}" PARENT_SCOPE) else() #unable to determine what this library is so just hope everything works #add pass it unmodified. set(${real_library} "${library}" PARENT_SCOPE) endif() endfunction() if(VTKm_ENABLE_TBB AND NOT TARGET vtkm::tbb) find_package(TBB REQUIRED) # Workaround a bug in older versions of cmake prevents linking with UNKNOWN IMPORTED libraries # refer to CMake issue #17245 if (CMAKE_VERSION VERSION_LESS 3.10) add_library(vtkm::tbb SHARED IMPORTED GLOBAL) else() add_library(vtkm::tbb UNKNOWN IMPORTED GLOBAL) endif() set_target_properties(vtkm::tbb PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${TBB_INCLUDE_DIRS}") if(EXISTS "${TBB_LIBRARY_RELEASE}") vtkm_extract_real_library("${TBB_LIBRARY_RELEASE}" real_path) set_property(TARGET vtkm::tbb APPEND PROPERTY IMPORTED_CONFIGURATIONS RELEASE) set_target_properties(vtkm::tbb PROPERTIES IMPORTED_LINK_INTERFACE_LANGUAGES "CXX" IMPORTED_LOCATION_RELEASE "${real_path}" ) elseif(EXISTS "${TBB_LIBRARY}") #When VTK-m is mixed with OSPray we could use the OSPray FindTBB file #which doesn't define TBB_LIBRARY_RELEASE but instead defined only #TBB_LIBRARY vtkm_extract_real_library("${TBB_LIBRARY}" real_path) set_property(TARGET vtkm::tbb APPEND PROPERTY IMPORTED_CONFIGURATIONS RELEASE) set_target_properties(vtkm::tbb PROPERTIES IMPORTED_LINK_INTERFACE_LANGUAGES "CXX" IMPORTED_LOCATION_RELEASE "${real_path}" ) endif() if(EXISTS "${TBB_LIBRARY_DEBUG}") vtkm_extract_real_library("${TBB_LIBRARY_DEBUG}" real_path) set_property(TARGET vtkm::tbb APPEND PROPERTY IMPORTED_CONFIGURATIONS DEBUG) set_target_properties(vtkm::tbb PROPERTIES IMPORTED_LINK_INTERFACE_LANGUAGES "CXX" IMPORTED_LOCATION_DEBUG "${real_path}" ) endif() endif() if(VTKm_ENABLE_OPENMP AND NOT TARGET vtkm::openmp) cmake_minimum_required(VERSION 3.12...3.15 FATAL_ERROR) find_package(OpenMP 4.0 REQUIRED COMPONENTS CXX QUIET) add_library(vtkm::openmp INTERFACE IMPORTED GLOBAL) if(OpenMP_CXX_FLAGS) set_property(TARGET vtkm::openmp APPEND PROPERTY INTERFACE_COMPILE_OPTIONS $<$:${OpenMP_CXX_FLAGS}>) if(VTKm_ENABLE_CUDA) string(REPLACE ";" "," openmp_cuda_flags "-Xcompiler=${OpenMP_CXX_FLAGS}") set_property(TARGET vtkm::openmp APPEND PROPERTY INTERFACE_COMPILE_OPTIONS $<$:${openmp_cuda_flags}>) endif() endif() if(OpenMP_CXX_LIBRARIES) set_target_properties(vtkm::openmp PROPERTIES INTERFACE_LINK_LIBRARIES "${OpenMP_CXX_LIBRARIES}") endif() endif() if(VTKm_ENABLE_CUDA) cmake_minimum_required(VERSION 3.13...3.15 FATAL_ERROR) enable_language(CUDA) if(CMAKE_CUDA_COMPILER_ID STREQUAL "NVIDIA" AND CMAKE_CUDA_COMPILER_VERSION VERSION_LESS 9.2) message(FATAL_ERROR "VTK-m CUDA support requires version 9.2+") endif() if (NOT TARGET vtkm::cuda) add_library(vtkm_cuda INTERFACE) add_library(vtkm::cuda ALIAS vtkm_cuda) set_target_properties(vtkm_cuda PROPERTIES EXPORT_NAME vtkm::cuda) install(TARGETS vtkm_cuda EXPORT ${VTKm_EXPORT_NAME}) # Reserve `requires_static_builds` to potential work around issues # where VTK-m doesn't work when building shared as virtual functions fail # inside device code. We don't want to force BUILD_SHARED_LIBS to a specific # value as that could impact other projects that embed VTK-m. Instead what # we do is make sure that libraries built by vtkm_library() are static # if they use CUDA # # This needs to be lower-case for the property to be properly exported # CMake 3.15 we can add `requires_static_builds` to the EXPORT_PROPERTIES # target property to have this automatically exported for us set_target_properties(vtkm_cuda PROPERTIES requires_static_builds TRUE ) set_target_properties(vtkm_cuda PROPERTIES INTERFACE_COMPILE_OPTIONS $<$:--expt-relaxed-constexpr> ) # add the -gencode flags so that all cuda code # way compiled properly #--------------------------------------------------------------------------- # Populates CMAKE_CUDA_FLAGS with the best set of flags to compile for a # given GPU architecture. The majority of developers should leave the # option at the default of 'native' which uses system introspection to # determine the smallest numerous of virtual and real architectures it # should target. # # The option of 'all' is provided for people generating libraries that # will deployed to any number of machines, it will compile all CUDA code # for all major virtual architectures, guaranteeing that the code will run # anywhere. # # The option 'none' is provided so that when being built as part of another # project, its own custom flags can be used. # # 1 - native # - Uses system introspection to determine compile flags # 2 - fermi # - Uses: --generate-code=arch=compute_20,code=sm_20 # 3 - kepler # - Uses: --generate-code=arch=compute_30,code=sm_30 # - Uses: --generate-code=arch=compute_35,code=sm_35 # 4 - maxwell # - Uses: --generate-code=arch=compute_50,code=sm_50 # 5 - pascal # - Uses: --generate-code=arch=compute_60,code=sm_60 # 6 - volta # - Uses: --generate-code=arch=compute_70,code=sm_70 # 7 - turing # - Uses: --generate-code=arch=compute_75code=sm_75 # 8 - all # - Uses: --generate-code=arch=compute_30,code=sm_30 # - Uses: --generate-code=arch=compute_35,code=sm_35 # - Uses: --generate-code=arch=compute_50,code=sm_50 # - Uses: --generate-code=arch=compute_60,code=sm_60 # - Uses: --generate-code=arch=compute_70,code=sm_70 # - Uses: --generate-code=arch=compute_75,code=sm_75 # 8 - none # #specify the property set(VTKm_CUDA_Architecture "native" CACHE STRING "Which GPU Architecture(s) to compile for") set_property(CACHE VTKm_CUDA_Architecture PROPERTY STRINGS native fermi kepler maxwell pascal volta turing all none) #detect what the property is set too if(VTKm_CUDA_Architecture STREQUAL "native") if(VTKM_CUDA_NATIVE_EXE_PROCESS_RAN_OUTPUT) #Use the cached value set(arch_flags ${VTKM_CUDA_NATIVE_EXE_PROCESS_RAN_OUTPUT}) else() #run execute_process to do auto_detection if(CMAKE_GENERATOR MATCHES "Visual Studio") set(args "-ccbin" "${CMAKE_CXX_COMPILER}" "--run" "${VTKm_CMAKE_MODULE_PATH}/VTKmDetectCUDAVersion.cu") elseif(CUDA_HOST_COMPILER) set(args "-ccbin" "${CUDA_HOST_COMPILER}" "--run" "${VTKm_CMAKE_MODULE_PATH}/VTKmDetectCUDAVersion.cu") else() set(args "--run" "${VTKm_CMAKE_MODULE_PATH}/VTKmDetectCUDAVersion.cu") endif() execute_process( COMMAND ${CMAKE_CUDA_COMPILER} ${args} RESULT_VARIABLE ran_properly OUTPUT_VARIABLE run_output WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}) if(ran_properly EQUAL 0) #find the position of the "--generate-code" output. With some compilers such as #msvc we get compile output plus run output. So we need to strip out just the #run output string(FIND "${run_output}" "--generate-code" position) string(SUBSTRING "${run_output}" ${position} -1 run_output) set(arch_flags ${run_output}) set(VTKM_CUDA_NATIVE_EXE_PROCESS_RAN_OUTPUT ${run_output} CACHE INTERNAL "device type(s) for cuda[native]") else() message(FATAL_ERROR "Error detecting architecture flags for CUDA. Please set VTKm_CUDA_Architecture manually.") endif() endif() endif() if(VTKm_CUDA_Architecture STREQUAL "fermi") set(arch_flags --generate-code=arch=compute_20,code=sm_20) elseif(VTKm_CUDA_Architecture STREQUAL "kepler") set(arch_flags --generate-code=arch=compute_30,code=sm_30 --generate-code=arch=compute_35,code=sm_35) elseif(VTKm_CUDA_Architecture STREQUAL "maxwell") set(arch_flags --generate-code=arch=compute_50,code=sm_50) elseif(VTKm_CUDA_Architecture STREQUAL "pascal") set(arch_flags --generate-code=arch=compute_60,code=sm_60) elseif(VTKm_CUDA_Architecture STREQUAL "volta") set(arch_flags --generate-code=arch=compute_70,code=sm_70) elseif(VTKm_CUDA_Architecture STREQUAL "turing") set(arch_flags --generate-code=arch=compute_75,code=sm_75) elseif(VTKm_CUDA_Architecture STREQUAL "all") set(arch_flags --generate-code=arch=compute_30,code=sm_30 --generate-code=arch=compute_35,code=sm_35 --generate-code=arch=compute_50,code=sm_50 --generate-code=arch=compute_60,code=sm_60 --generate-code=arch=compute_70,code=sm_70 --generate-code=arch=compute_75,code=sm_75) endif() string(REPLACE ";" " " arch_flags "${arch_flags}") set(CMAKE_CUDA_FLAGS "${CMAKE_CUDA_FLAGS} ${arch_flags}") # This needs to be lower-case for the property to be properly exported # CMake 3.15 we can add `cuda_architecture_flags` to the EXPORT_PROPERTIES # target property to have this automatically exported for us set_target_properties(vtkm_cuda PROPERTIES cuda_architecture_flags "${arch_flags}") set(VTKm_CUDA_Architecture_Flags "${arch_flags}") endif() endif() if(NOT TARGET Threads::Threads) set(THREADS_PREFER_PTHREAD_FLAG ON) find_package(Threads REQUIRED) endif()