175 lines
8.5 KiB
CMake
175 lines
8.5 KiB
CMake
KOKKOS_CFG_DEPENDS(CXX_STD COMPILER_ID)
|
|
|
|
FUNCTION(kokkos_set_cxx_standard_feature standard)
|
|
SET(EXTENSION_NAME CMAKE_CXX${standard}_EXTENSION_COMPILE_OPTION)
|
|
SET(STANDARD_NAME CMAKE_CXX${standard}_STANDARD_COMPILE_OPTION)
|
|
SET(FEATURE_NAME cxx_std_${standard})
|
|
#CMake's way of telling us that the standard (or extension)
|
|
#flags are supported is the extension/standard variables
|
|
IF (NOT DEFINED CMAKE_CXX_EXTENSIONS)
|
|
IF(KOKKOS_DONT_ALLOW_EXTENSIONS)
|
|
GLOBAL_SET(KOKKOS_USE_CXX_EXTENSIONS OFF)
|
|
ELSE()
|
|
GLOBAL_SET(KOKKOS_USE_CXX_EXTENSIONS ON)
|
|
ENDIF()
|
|
ELSEIF(CMAKE_CXX_EXTENSIONS)
|
|
IF(KOKKOS_DONT_ALLOW_EXTENSIONS)
|
|
MESSAGE(FATAL_ERROR "The chosen configuration does not support CXX extensions flags: ${KOKKOS_DONT_ALLOW_EXTENSIONS}. Must set CMAKE_CXX_EXTENSIONS=OFF to continue")
|
|
ELSE()
|
|
GLOBAL_SET(KOKKOS_USE_CXX_EXTENSIONS ON)
|
|
ENDIF()
|
|
ELSE()
|
|
#For trilinos, we need to make sure downstream projects
|
|
GLOBAL_SET(KOKKOS_USE_CXX_EXTENSIONS OFF)
|
|
ENDIF()
|
|
|
|
IF (KOKKOS_USE_CXX_EXTENSIONS AND ${EXTENSION_NAME})
|
|
MESSAGE(STATUS "Using ${${EXTENSION_NAME}} for C++${standard} extensions as feature")
|
|
GLOBAL_SET(KOKKOS_CXX_STANDARD_FEATURE ${FEATURE_NAME})
|
|
ELSEIF(NOT KOKKOS_USE_CXX_EXTENSIONS AND ${STANDARD_NAME})
|
|
MESSAGE(STATUS "Using ${${STANDARD_NAME}} for C++${standard} standard as feature")
|
|
IF (KOKKOS_CXX_COMPILER_ID STREQUAL NVIDIA AND (KOKKOS_CXX_HOST_COMPILER_ID STREQUAL GNU OR KOKKOS_CXX_HOST_COMPILER_ID STREQUAL Clang))
|
|
SET(SUPPORTED_NVCC_FLAGS "-std=c++14;-std=c++17")
|
|
IF (NOT ${${STANDARD_NAME}} IN_LIST SUPPORTED_NVCC_FLAGS)
|
|
MESSAGE(FATAL_ERROR "CMake wants to use ${${STANDARD_NAME}} which is not supported by NVCC. Using a more recent host compiler or a more recent CMake version might help.")
|
|
ENDIF()
|
|
ENDIF()
|
|
GLOBAL_SET(KOKKOS_CXX_STANDARD_FEATURE ${FEATURE_NAME})
|
|
ELSEIF (CMAKE_CXX_COMPILER_ID STREQUAL "MSVC" OR "x${CMAKE_CXX_SIMULATE_ID}" STREQUAL "xMSVC")
|
|
#MSVC doesn't need a command line flag, that doesn't mean it has no support
|
|
MESSAGE(STATUS "Using no flag for C++${standard} standard as feature")
|
|
GLOBAL_SET(KOKKOS_CXX_STANDARD_FEATURE ${FEATURE_NAME})
|
|
ELSEIF((KOKKOS_CXX_COMPILER_ID STREQUAL "NVIDIA") AND WIN32)
|
|
MESSAGE(STATUS "Using no flag for C++${standard} standard as feature")
|
|
GLOBAL_SET(KOKKOS_CXX_STANDARD_FEATURE "")
|
|
ELSEIF((KOKKOS_CXX_COMPILER_ID STREQUAL "Fujitsu"))
|
|
MESSAGE(STATUS "Using no flag for C++${standard} standard as feature")
|
|
GLOBAL_SET(KOKKOS_CXX_STANDARD_FEATURE "")
|
|
ELSE()
|
|
#nope, we can't do anything here
|
|
MESSAGE(WARNING "C++${standard} is not supported as a compiler feature. We will choose custom flags for now, but this behavior has been deprecated. Please open an issue at https://github.com/kokkos/kokkos/issues reporting that ${KOKKOS_CXX_COMPILER_ID} ${KOKKOS_CXX_COMPILER_VERSION} failed for ${KOKKOS_CXX_STANDARD}, preferably including your CMake command.")
|
|
GLOBAL_SET(KOKKOS_CXX_STANDARD_FEATURE "")
|
|
ENDIF()
|
|
|
|
IF((NOT WIN32) AND (NOT ("${KOKKOS_CXX_COMPILER_ID}" STREQUAL "Fujitsu")))
|
|
IF(NOT ${FEATURE_NAME} IN_LIST CMAKE_CXX_COMPILE_FEATURES)
|
|
MESSAGE(FATAL_ERROR "Compiler ${KOKKOS_CXX_COMPILER_ID} should support ${FEATURE_NAME}, but CMake reports feature not supported")
|
|
ENDIF()
|
|
ENDIF()
|
|
ENDFUNCTION()
|
|
|
|
|
|
IF (KOKKOS_CXX_STANDARD AND CMAKE_CXX_STANDARD)
|
|
#make sure these are consistent
|
|
IF (NOT KOKKOS_CXX_STANDARD STREQUAL CMAKE_CXX_STANDARD)
|
|
MESSAGE(WARNING "Specified both CMAKE_CXX_STANDARD=${CMAKE_CXX_STANDARD} and KOKKOS_CXX_STANDARD=${KOKKOS_CXX_STANDARD}, but they don't match")
|
|
SET(CMAKE_CXX_STANDARD ${KOKKOS_CXX_STANDARD} CACHE STRING "C++ standard" FORCE)
|
|
ENDIF()
|
|
ENDIF()
|
|
|
|
|
|
IF(KOKKOS_CXX_STANDARD STREQUAL "14")
|
|
kokkos_set_cxx_standard_feature(14)
|
|
SET(KOKKOS_CXX_INTERMEDIATE_STANDARD "1Y")
|
|
SET(KOKKOS_ENABLE_CXX14 ON)
|
|
ELSEIF(KOKKOS_CXX_STANDARD STREQUAL "17")
|
|
kokkos_set_cxx_standard_feature(17)
|
|
SET(KOKKOS_CXX_INTERMEDIATE_STANDARD "1Z")
|
|
SET(KOKKOS_ENABLE_CXX17 ON)
|
|
ELSEIF(KOKKOS_CXX_STANDARD STREQUAL "20")
|
|
kokkos_set_cxx_standard_feature(20)
|
|
SET(KOKKOS_CXX_INTERMEDIATE_STANDARD "2A")
|
|
SET(KOKKOS_ENABLE_CXX20 ON)
|
|
ELSEIF(KOKKOS_CXX_STANDARD STREQUAL "98" OR KOKKOS_CXX_STANDARD STREQUAL "11")
|
|
MESSAGE(FATAL_ERROR "Kokkos requires C++14 or newer!")
|
|
ELSE()
|
|
MESSAGE(FATAL_ERROR "Unknown C++ standard ${KOKKOS_CXX_STANDARD} - must be 14, 17, or 20")
|
|
ENDIF()
|
|
|
|
# Enforce that we can compile a simple C++14 program
|
|
|
|
TRY_COMPILE(CAN_COMPILE_CPP14
|
|
${KOKKOS_TOP_BUILD_DIR}/corner_cases
|
|
${KOKKOS_SOURCE_DIR}/cmake/compile_tests/cplusplus14.cpp
|
|
OUTPUT_VARIABLE ERROR_MESSAGE
|
|
CXX_STANDARD 14
|
|
)
|
|
if (NOT CAN_COMPILE_CPP14)
|
|
UNSET(CAN_COMPILE_CPP14 CACHE) #make sure CMake always re-runs this
|
|
MESSAGE(FATAL_ERROR "C++${KOKKOS_CXX_STANDARD}-compliant compiler detected, but unable to compile C++14 or later program. Verify that ${CMAKE_CXX_COMPILER_ID}:${CMAKE_CXX_COMPILER_VERSION} is set up correctly (e.g., check that correct library headers are being used).\nFailing output:\n ${ERROR_MESSAGE}")
|
|
ENDIF()
|
|
UNSET(CAN_COMPILE_CPP14 CACHE) #make sure CMake always re-runs this
|
|
|
|
|
|
# Enforce that extensions are turned off for nvcc_wrapper.
|
|
# For compiling CUDA code using nvcc_wrapper, we will use the host compiler's
|
|
# flags for turning on C++14. Since for compiler ID and versioning purposes
|
|
# CMake recognizes the host compiler when calling nvcc_wrapper, this just
|
|
# works. Both NVCC and nvcc_wrapper only recognize '-std=c++14' which means
|
|
# that we can only use host compilers for CUDA builds that use those flags.
|
|
# It also means that extensions (gnu++14) can't be turned on for CUDA builds.
|
|
|
|
IF(KOKKOS_CXX_COMPILER_ID STREQUAL NVIDIA)
|
|
IF(NOT DEFINED CMAKE_CXX_EXTENSIONS)
|
|
SET(CMAKE_CXX_EXTENSIONS OFF)
|
|
ELSEIF(CMAKE_CXX_EXTENSIONS)
|
|
MESSAGE(FATAL_ERROR "NVCC doesn't support C++ extensions. Set -DCMAKE_CXX_EXTENSIONS=OFF")
|
|
ENDIF()
|
|
ENDIF()
|
|
|
|
IF(KOKKOS_ENABLE_CUDA)
|
|
# ENFORCE that the compiler can compile CUDA code.
|
|
IF(KOKKOS_CXX_COMPILER_ID STREQUAL Clang)
|
|
IF(KOKKOS_CXX_COMPILER_VERSION VERSION_LESS 4.0.0)
|
|
MESSAGE(FATAL_ERROR "Compiling CUDA code directly with Clang requires version 4.0.0 or higher.")
|
|
ENDIF()
|
|
IF(NOT DEFINED CMAKE_CXX_EXTENSIONS)
|
|
SET(CMAKE_CXX_EXTENSIONS OFF)
|
|
ELSEIF(CMAKE_CXX_EXTENSIONS)
|
|
MESSAGE(FATAL_ERROR "Compiling CUDA code with clang doesn't support C++ extensions. Set -DCMAKE_CXX_EXTENSIONS=OFF")
|
|
ENDIF()
|
|
ELSEIF(NOT KOKKOS_CXX_COMPILER_ID STREQUAL NVIDIA)
|
|
MESSAGE(FATAL_ERROR "Invalid compiler for CUDA. The compiler must be nvcc_wrapper or Clang or use kokkos_launch_compiler, but compiler ID was ${KOKKOS_CXX_COMPILER_ID}")
|
|
ENDIF()
|
|
ENDIF()
|
|
|
|
IF (NOT KOKKOS_CXX_STANDARD_FEATURE)
|
|
#we need to pick the C++ flags ourselves
|
|
UNSET(CMAKE_CXX_STANDARD)
|
|
UNSET(CMAKE_CXX_STANDARD CACHE)
|
|
IF(KOKKOS_CXX_COMPILER_ID STREQUAL Cray)
|
|
INCLUDE(${KOKKOS_SRC_PATH}/cmake/cray.cmake)
|
|
kokkos_set_cray_flags(${KOKKOS_CXX_STANDARD} ${KOKKOS_CXX_INTERMEDIATE_STANDARD})
|
|
ELSEIF(KOKKOS_CXX_COMPILER_ID STREQUAL NVHPC)
|
|
INCLUDE(${KOKKOS_SRC_PATH}/cmake/pgi.cmake)
|
|
kokkos_set_pgi_flags(${KOKKOS_CXX_STANDARD} ${KOKKOS_CXX_INTERMEDIATE_STANDARD})
|
|
ELSEIF(KOKKOS_CXX_COMPILER_ID STREQUAL Intel)
|
|
INCLUDE(${KOKKOS_SRC_PATH}/cmake/intel.cmake)
|
|
kokkos_set_intel_flags(${KOKKOS_CXX_STANDARD} ${KOKKOS_CXX_INTERMEDIATE_STANDARD})
|
|
ELSEIF((KOKKOS_CXX_COMPILER_ID STREQUAL "MSVC") OR ((KOKKOS_CXX_COMPILER_ID STREQUAL "NVIDIA") AND WIN32))
|
|
INCLUDE(${KOKKOS_SRC_PATH}/cmake/msvc.cmake)
|
|
kokkos_set_msvc_flags(${KOKKOS_CXX_STANDARD} ${KOKKOS_CXX_INTERMEDIATE_STANDARD})
|
|
ELSE()
|
|
INCLUDE(${KOKKOS_SRC_PATH}/cmake/gnu.cmake)
|
|
kokkos_set_gnu_flags(${KOKKOS_CXX_STANDARD} ${KOKKOS_CXX_INTERMEDIATE_STANDARD})
|
|
ENDIF()
|
|
#check that the compiler accepts the C++ standard flag
|
|
INCLUDE(CheckCXXCompilerFlag)
|
|
IF (DEFINED CXX_STD_FLAGS_ACCEPTED)
|
|
UNSET(CXX_STD_FLAGS_ACCEPTED CACHE)
|
|
ENDIF()
|
|
CHECK_CXX_COMPILER_FLAG("${KOKKOS_CXX_STANDARD_FLAG}" CXX_STD_FLAGS_ACCEPTED)
|
|
IF (NOT CXX_STD_FLAGS_ACCEPTED)
|
|
CHECK_CXX_COMPILER_FLAG("${KOKKOS_CXX_INTERMEDIATE_STANDARD_FLAG}" CXX_INT_STD_FLAGS_ACCEPTED)
|
|
IF (NOT CXX_INT_STD_FLAGS_ACCEPTED)
|
|
MESSAGE(FATAL_ERROR "${KOKKOS_CXX_COMPILER_ID} did not accept ${KOKKOS_CXX_STANDARD_FLAG} or ${KOKKOS_CXX_INTERMEDIATE_STANDARD_FLAG}. You likely need to reduce the level of the C++ standard from ${KOKKOS_CXX_STANDARD}")
|
|
ENDIF()
|
|
SET(KOKKOS_CXX_STANDARD_FLAG ${KOKKOS_CXX_INTERMEDIATE_STANDARD_FLAG})
|
|
ENDIF()
|
|
MESSAGE(STATUS "Compiler features not supported, but ${KOKKOS_CXX_COMPILER_ID} accepts ${KOKKOS_CXX_STANDARD_FLAG}")
|
|
ENDIF()
|
|
|
|
|
|
|
|
|