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CMakeLists.txt
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CMakeLists.txt
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cmake_minimum_required(VERSION 3.14)
project(MDSpan
VERSION 0.4.0
LANGUAGES CXX
)
include(GNUInstallDirs)
################################################################################
list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
################################################################################
option(MDSPAN_ENABLE_TESTS "Enable tests." Off)
option(MDSPAN_ENABLE_EXAMPLES "Build examples." Off)
option(MDSPAN_ENABLE_BENCHMARKS "Enable benchmarks." Off)
option(MDSPAN_ENABLE_COMP_BENCH "Enable compilation benchmarks." Off)
option(MDSPAN_ENABLE_CUDA "Enable Cuda tests/benchmarks/examples if tests/benchmarks/examples are enabled." Off)
option(MDSPAN_ENABLE_OPENMP "Enable OpenMP benchmarks if benchmarks are enabled." On)
option(MDSPAN_USE_SYSTEM_GTEST "Use system-installed GoogleTest library for tests." Off)
# Option to override which C++ standard to use
set(MDSPAN_CXX_STANDARD DETECT CACHE STRING "Override the default CXX_STANDARD to compile with.")
set_property(CACHE MDSPAN_CXX_STANDARD PROPERTY STRINGS DETECT 14 17 20 23)
option(MDSPAN_ENABLE_CONCEPTS "Try to enable concepts support by giving extra flags." On)
################################################################################
# Decide on the standard to use
if(MDSPAN_CXX_STANDARD STREQUAL "17")
if("cxx_std_17" IN_LIST CMAKE_CXX_COMPILE_FEATURES)
message(STATUS "Using C++17 standard")
set(CMAKE_CXX_STANDARD 17)
else()
message(FATAL_ERROR "Requested MDSPAN_CXX_STANDARD \"17\" not supported by provided C++ compiler")
endif()
elseif(MDSPAN_CXX_STANDARD STREQUAL "14")
if("cxx_std_14" IN_LIST CMAKE_CXX_COMPILE_FEATURES)
message(STATUS "Using C++14 standard")
set(CMAKE_CXX_STANDARD 14)
else()
message(FATAL_ERROR "Requested MDSPAN_CXX_STANDARD \"14\" not supported by provided C++ compiler")
endif()
elseif(MDSPAN_CXX_STANDARD STREQUAL "20")
if("cxx_std_20" IN_LIST CMAKE_CXX_COMPILE_FEATURES)
message(STATUS "Using C++20 standard")
set(CMAKE_CXX_STANDARD 20)
else()
message(FATAL_ERROR "Requested MDSPAN_CXX_STANDARD \"20\" not supported by provided C++ compiler")
endif()
elseif(MDSPAN_CXX_STANDARD STREQUAL "23")
if("cxx_std_23" IN_LIST CMAKE_CXX_COMPILE_FEATURES)
message(STATUS "Using C++23 standard")
set(CMAKE_CXX_STANDARD 23)
else()
message(FATAL_ERROR "Requested MDSPAN_CXX_STANDARD \"23\" not supported by provided C++ compiler")
endif()
else()
if("cxx_std_23" IN_LIST CMAKE_CXX_COMPILE_FEATURES)
set(CMAKE_CXX_STANDARD 23)
message(STATUS "Detected support for C++23 standard")
elseif("cxx_std_20" IN_LIST CMAKE_CXX_COMPILE_FEATURES)
set(CMAKE_CXX_STANDARD 20)
message(STATUS "Detected support for C++20 standard")
elseif("cxx_std_17" IN_LIST CMAKE_CXX_COMPILE_FEATURES)
set(CMAKE_CXX_STANDARD 17)
message(STATUS "Detected support for C++17 standard")
elseif("cxx_std_14" IN_LIST CMAKE_CXX_COMPILE_FEATURES)
set(CMAKE_CXX_STANDARD 14)
message(STATUS "Detected support for C++14 standard")
else()
message(FATAL_ERROR "Cannot detect CXX_STANDARD of C++14 or newer.")
endif()
endif()
################################################################################
if(MDSPAN_ENABLE_CONCEPTS)
if(CMAKE_CXX_STANDARD GREATER_EQUAL 20)
include(CheckCXXCompilerFlag)
check_cxx_compiler_flag("-fconcepts" COMPILER_SUPPORTS_FCONCEPTS)
if(COMPILER_SUPPORTS_FCONCEPTS)
message(STATUS "Using \"-fconcepts\" to enable concepts support")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fconcepts")
else()
check_cxx_compiler_flag("-fconcepts-ts" COMPILER_SUPPORTS_FCONCEPTS_TS)
if(COMPILER_SUPPORTS_FCONCEPTS)
message(STATUS "Using \"-fconcepts-ts\" to enable concepts support")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fconcepts-ts")
endif()
endif()
# Otherwise, it's possible that the compiler supports concepts without flags,
# but if it doesn't, they just won't be used, which is fine
endif()
endif()
################################################################################
if(MDSPAN_ENABLE_CUDA)
include(CheckLanguage)
check_language(CUDA)
if(CMAKE_CUDA_COMPILER)
message(STATUS "Using ${CMAKE_CXX_STANDARD} as CMAKE_CUDA_STANDARD")
set(CMAKE_CUDA_STANDARD ${CMAKE_CXX_STANDARD})
set(CMAKE_CUDA_STANDARD_REQUIRED ON)
enable_language(CUDA)
else()
message(FATAL_ERROR "Requested CUDA support, but no CMAKE_CUDA_COMPILER available")
endif()
if(MDSPAN_ENABLE_TESTS)
set(MDSPAN_TEST_LANGUAGE CUDA)
endif()
endif()
################################################################################
add_library(mdspan INTERFACE)
add_library(std::mdspan ALIAS mdspan)
target_include_directories(mdspan INTERFACE
$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
)
################################################################################
install(TARGETS mdspan EXPORT mdspanTargets
INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
)
install(EXPORT mdspanTargets
FILE mdspanTargets.cmake
NAMESPACE std::
DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/mdspan
)
export(TARGETS mdspan
NAMESPACE std::
FILE mdspanTargets.cmake
)
install(DIRECTORY include/experimental DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
include(CMakePackageConfigHelpers)
configure_package_config_file(cmake/mdspanConfig.cmake.in
${CMAKE_CURRENT_BINARY_DIR}/mdspanConfig.cmake
INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/mdspan
)
write_basic_package_version_file(${CMAKE_CURRENT_BINARY_DIR}/mdspanConfigVersion.cmake
COMPATIBILITY SameMajorVersion
ARCH_INDEPENDENT
)
install(FILES ${CMAKE_CURRENT_BINARY_DIR}/mdspanConfig.cmake ${CMAKE_CURRENT_BINARY_DIR}/mdspanConfigVersion.cmake
DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/mdspan
)
################################################################################
if(MDSPAN_ENABLE_TESTS)
enable_testing()
add_subdirectory(tests)
add_subdirectory(compilation_tests)
endif()
if(MDSPAN_ENABLE_EXAMPLES)
add_subdirectory(examples)
endif()
if(MDSPAN_ENABLE_BENCHMARKS)
if(NOT MDSPAN_CXX_STANDARD STREQUAL "14")
add_subdirectory(benchmarks)
else()
MESSAGE(FATAL_ERROR "Benchmarks are not available in C++14 mode. Turn MDSPAN_ENABLE_BENCHMARKS OFF or use C++17 or newer.")
endif()
endif()
if(MDSPAN_ENABLE_COMP_BENCH)
add_subdirectory(comp_bench)
endif()