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cmake/Modules/CMakeDetermineCUDACompiler....

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# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
include(${CMAKE_ROOT}/Modules/CMakeDetermineCompiler.cmake)
include(${CMAKE_ROOT}/Modules/CMakeParseImplicitLinkInfo.cmake)
if(NOT ((CMAKE_GENERATOR MATCHES "Make") OR
(CMAKE_GENERATOR MATCHES "Ninja") OR
(CMAKE_GENERATOR MATCHES "Visual Studio (1|[9][0-9])")))
message(FATAL_ERROR "CUDA language not currently supported by \"${CMAKE_GENERATOR}\" generator")
endif()
if(CMAKE_GENERATOR MATCHES "Visual Studio")
if(DEFINED ENV{CUDAHOSTCXX} OR DEFINED CMAKE_CUDA_HOST_COMPILER)
message(WARNING "Visual Studio does not support specifying CUDAHOSTCXX or CMAKE_CUDA_HOST_COMPILER. Using the C++ compiler provided by Visual Studio.")
endif()
else()
if(NOT CMAKE_CUDA_COMPILER)
set(CMAKE_CUDA_COMPILER_INIT NOTFOUND)
# prefer the environment variable CUDACXX
if(NOT $ENV{CUDACXX} STREQUAL "")
get_filename_component(CMAKE_CUDA_COMPILER_INIT $ENV{CUDACXX} PROGRAM PROGRAM_ARGS CMAKE_CUDA_FLAGS_ENV_INIT)
if(CMAKE_CUDA_FLAGS_ENV_INIT)
set(CMAKE_CUDA_COMPILER_ARG1 "${CMAKE_CUDA_FLAGS_ENV_INIT}" CACHE STRING "Arguments to CUDA compiler")
endif()
if(NOT EXISTS ${CMAKE_CUDA_COMPILER_INIT})
message(FATAL_ERROR "Could not find compiler set in environment variable CUDACXX:\n$ENV{CUDACXX}.\n${CMAKE_CUDA_COMPILER_INIT}")
endif()
endif()
# finally list compilers to try
if(NOT CMAKE_CUDA_COMPILER_INIT)
set(CMAKE_CUDA_COMPILER_LIST nvcc)
endif()
set(_CMAKE_CUDA_COMPILER_PATHS "$ENV{CUDA_PATH}/bin")
_cmake_find_compiler(CUDA)
unset(_CMAKE_CUDA_COMPILER_PATHS)
else()
_cmake_find_compiler_path(CUDA)
endif()
mark_as_advanced(CMAKE_CUDA_COMPILER)
#Allow the user to specify a host compiler except for Visual Studio
if(NOT $ENV{CUDAHOSTCXX} STREQUAL "")
get_filename_component(CMAKE_CUDA_HOST_COMPILER $ENV{CUDAHOSTCXX} PROGRAM)
if(NOT EXISTS ${CMAKE_CUDA_HOST_COMPILER})
message(FATAL_ERROR "Could not find compiler set in environment variable CUDAHOSTCXX:\n$ENV{CUDAHOSTCXX}.\n${CMAKE_CUDA_HOST_COMPILER}")
endif()
endif()
endif()
if(NOT "$ENV{CUDAARCHS}" STREQUAL "")
set(CMAKE_CUDA_ARCHITECTURES "$ENV{CUDAARCHS}" CACHE STRING "CUDA architectures")
endif()
# Build a small source file to identify the compiler.
if(NOT CMAKE_CUDA_COMPILER_ID_RUN)
set(CMAKE_CUDA_COMPILER_ID_RUN 1)
include(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerId.cmake)
if(CMAKE_GENERATOR MATCHES "Visual Studio")
# We will not know CMAKE_CUDA_COMPILER until the main compiler id step
# below extracts it, but we do know that the compiler id will be NVIDIA.
set(CMAKE_CUDA_COMPILER_ID "NVIDIA")
else()
# We determine the vendor to help with find the toolkit and use the right flags for detection right away.
# The main compiler identification is still needed below to extract other information.
list(APPEND CMAKE_CUDA_COMPILER_ID_VENDORS NVIDIA Clang)
set(CMAKE_CUDA_COMPILER_ID_VENDOR_REGEX_NVIDIA "nvcc: NVIDIA \\(R\\) Cuda compiler driver")
set(CMAKE_CUDA_COMPILER_ID_VENDOR_REGEX_Clang "(clang version)")
CMAKE_DETERMINE_COMPILER_ID_VENDOR(CUDA "--version")
if(CMAKE_CUDA_COMPILER_ID STREQUAL "Clang" AND WIN32)
message(FATAL_ERROR "Clang with CUDA is not yet supported on Windows. See CMake issue #20776.")
endif()
# Find the CUDA toolkit to get:
# - CMAKE_CUDA_COMPILER_TOOLKIT_VERSION
# - CMAKE_CUDA_COMPILER_TOOLKIT_ROOT
# - CMAKE_CUDA_COMPILER_LIBRARY_ROOT
# We save them in CMakeCUDACompiler.cmake so FindCUDAToolkit can
# avoid searching on future runs and the toolkit is the same.
# Match arguments with cmake_cuda_architectures_all call.
include(Internal/CMakeCUDAFindToolkit)
cmake_cuda_find_toolkit(CUDA CMAKE_CUDA_COMPILER_)
set(CMAKE_CUDA_DEVICE_LINKER "${CMAKE_CUDA_COMPILER_TOOLKIT_ROOT}/bin/nvlink${CMAKE_EXECUTABLE_SUFFIX}")
set(CMAKE_CUDA_FATBINARY "${CMAKE_CUDA_COMPILER_TOOLKIT_ROOT}/bin/fatbinary${CMAKE_EXECUTABLE_SUFFIX}")
endif()
set(CMAKE_CUDA_COMPILER_ID_FLAGS_ALWAYS "-v")
if(CMAKE_CUDA_COMPILER_ID STREQUAL "NVIDIA")
set(nvcc_test_flags "--keep --keep-dir tmp")
if(CMAKE_CUDA_HOST_COMPILER)
string(APPEND nvcc_test_flags " -ccbin=\"${CMAKE_CUDA_HOST_COMPILER}\"")
endif()
# If we have extracted the vendor as NVIDIA we should require detection to
# work. If we don't, users will get confusing errors later about failure
# to detect a default value for CMAKE_CUDA_ARCHITECTURES
set(CMAKE_CUDA_COMPILER_ID_REQUIRE_SUCCESS ON)
elseif(CMAKE_CUDA_COMPILER_ID STREQUAL "Clang")
set(clang_test_flags "--cuda-path=\"${CMAKE_CUDA_COMPILER_LIBRARY_ROOT}\"")
if(CMAKE_CROSSCOMPILING)
# Need to pass the host target and include directories if we're crosscompiling.
string(APPEND clang_test_flags " --sysroot=\"${CMAKE_SYSROOT}\" --target=${CMAKE_CUDA_COMPILER_TARGET}")
endif()
endif()
# If the user set CMAKE_CUDA_ARCHITECTURES, validate its value.
include(Internal/CMakeCUDAArchitecturesValidate)
cmake_cuda_architectures_validate(CUDA)
if(CMAKE_CUDA_COMPILER_ID STREQUAL "Clang")
# Clang doesn't automatically select an architecture supported by the SDK.
# Try in reverse order of deprecation with the most recent at front (i.e. the most likely to work for new setups).
foreach(arch "52" "30" "20")
list(APPEND CMAKE_CUDA_COMPILER_ID_TEST_FLAGS_FIRST "${clang_test_flags} --cuda-gpu-arch=sm_${arch}")
endforeach()
elseif(CMAKE_CUDA_COMPILER_ID STREQUAL "NVIDIA")
list(APPEND CMAKE_CUDA_COMPILER_ID_TEST_FLAGS_FIRST "${nvcc_test_flags}")
endif()
# We perform compiler identification for a second time to extract implicit linking info and host compiler for NVCC.
# We need to unset the compiler ID otherwise CMAKE_DETERMINE_COMPILER_ID() doesn't work.
set(CMAKE_CUDA_COMPILER_ID)
set(CMAKE_CUDA_PLATFORM_ID)
file(READ ${CMAKE_ROOT}/Modules/CMakePlatformId.h.in
CMAKE_CUDA_COMPILER_ID_PLATFORM_CONTENT)
CMAKE_DETERMINE_COMPILER_ID(CUDA CUDAFLAGS CMakeCUDACompilerId.cu)
if(CMAKE_GENERATOR MATCHES "Visual Studio")
# Now that we have the path to nvcc, we can compute the toolkit root.
get_filename_component(CMAKE_CUDA_COMPILER_TOOLKIT_ROOT "${CMAKE_CUDA_COMPILER}" DIRECTORY)
get_filename_component(CMAKE_CUDA_COMPILER_TOOLKIT_ROOT "${CMAKE_CUDA_COMPILER_TOOLKIT_ROOT}" DIRECTORY)
set(CMAKE_CUDA_COMPILER_LIBRARY_ROOT "${CMAKE_CUDA_COMPILER_TOOLKIT_ROOT}")
# The compiler comes with the toolkit, so the versions are the same.
set(CMAKE_CUDA_COMPILER_TOOLKIT_VERSION ${CMAKE_CUDA_COMPILER_VERSION})
endif()
include(Internal/CMakeCUDAArchitecturesAll)
# From CMAKE_CUDA_COMPILER_TOOLKIT_VERSION and CMAKE_CUDA_COMPILER_{ID,VERSION}, get:
# - CMAKE_CUDA_ARCHITECTURES_ALL
# - CMAKE_CUDA_ARCHITECTURES_ALL_MAJOR
# Match arguments with cmake_cuda_find_toolkit call.
cmake_cuda_architectures_all(CUDA CMAKE_CUDA_COMPILER_)
_cmake_find_compiler_sysroot(CUDA)
endif()
set(_CMAKE_PROCESSING_LANGUAGE "CUDA")
include(CMakeFindBinUtils)
include(Compiler/${CMAKE_CUDA_COMPILER_ID}-FindBinUtils OPTIONAL)
unset(_CMAKE_PROCESSING_LANGUAGE)
if(MSVC_CUDA_ARCHITECTURE_ID)
set(SET_MSVC_CUDA_ARCHITECTURE_ID
"set(MSVC_CUDA_ARCHITECTURE_ID ${MSVC_CUDA_ARCHITECTURE_ID})")
endif()
if(CMAKE_CUDA_COMPILER_ID STREQUAL "Clang")
string(REGEX MATCHALL "-target-cpu sm_([0-9]+)" _clang_target_cpus "${CMAKE_CUDA_COMPILER_PRODUCED_OUTPUT}")
foreach(_clang_target_cpu ${_clang_target_cpus})
if(_clang_target_cpu MATCHES "-target-cpu sm_([0-9]+)")
list(APPEND CMAKE_CUDA_ARCHITECTURES_DEFAULT "${CMAKE_MATCH_1}")
endif()
endforeach()
# Find target directory when crosscompiling.
if(CMAKE_CROSSCOMPILING)
if(CMAKE_SYSTEM_PROCESSOR STREQUAL "armv7-a")
# Support for NVPACK
set(_CUDA_TARGET_NAME "armv7-linux-androideabi")
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "arm")
set(_CUDA_TARGET_NAME "armv7-linux-gnueabihf")
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "aarch64")
if(ANDROID_ARCH_NAME STREQUAL "arm64")
set(_CUDA_TARGET_NAME "aarch64-linux-androideabi")
else()
set(_CUDA_TARGET_NAME "aarch64-linux")
endif()
elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL "x86_64")
set(_CUDA_TARGET_NAME "x86_64-linux")
endif()
if(EXISTS "${CMAKE_CUDA_COMPILER_TOOLKIT_ROOT}/targets/${_CUDA_TARGET_NAME}")
set(_CUDA_TARGET_DIR "${CMAKE_CUDA_COMPILER_TOOLKIT_ROOT}/targets/${_CUDA_TARGET_NAME}")
endif()
endif()
# If not already set we can simply use the toolkit root or it's a scattered installation.
if(NOT _CUDA_TARGET_DIR)
set(_CUDA_TARGET_DIR "${CMAKE_CUDA_COMPILER_TOOLKIT_ROOT}")
endif()
# We can't use find_library() yet at this point, so try a few guesses.
if(EXISTS "${_CUDA_TARGET_DIR}/lib64")
set(_CUDA_LIBRARY_DIR "${_CUDA_TARGET_DIR}/lib64")
elseif(EXISTS "${_CUDA_TARGET_DIR}/lib/x64")
set(_CUDA_LIBRARY_DIR "${_CUDA_TARGET_DIR}/lib/x64")
elseif(EXISTS "${_CUDA_TARGET_DIR}/lib")
set(_CUDA_LIBRARY_DIR "${_CUDA_TARGET_DIR}/lib")
else()
message(FATAL_ERROR "Unable to find _CUDA_LIBRARY_DIR based on _CUDA_TARGET_DIR=${_CUDA_TARGET_DIR}")
endif()
# _CUDA_TARGET_DIR always points to the directory containing the include directory.
# On a scattered installation /usr, on a non-scattered something like /usr/local/cuda or /usr/local/cuda-10.2/targets/aarch64-linux.
if(EXISTS "${_CUDA_TARGET_DIR}/include/cuda_runtime.h")
set(_CUDA_INCLUDE_DIR "${_CUDA_TARGET_DIR}/include")
else()
message(FATAL_ERROR "Unable to find cuda_runtime.h in \"${_CUDA_TARGET_DIR}/include\" for _CUDA_INCLUDE_DIR.")
endif()
# Clang does not add any CUDA SDK libraries or directories when invoking the host linker.
# Add the CUDA toolkit library directory ourselves so that linking works.
# The CUDA runtime libraries are handled elsewhere by CMAKE_CUDA_RUNTIME_LIBRARY.
set(CMAKE_CUDA_TOOLKIT_INCLUDE_DIRECTORIES "${_CUDA_INCLUDE_DIR}")
set(CMAKE_CUDA_HOST_IMPLICIT_LINK_DIRECTORIES "${_CUDA_LIBRARY_DIR}")
set(CMAKE_CUDA_HOST_IMPLICIT_LINK_LIBRARIES "")
set(CMAKE_CUDA_HOST_IMPLICIT_LINK_FRAMEWORK_DIRECTORIES "")
# Don't leak variables unnecessarily to user code.
unset(_CUDA_INCLUDE_DIR)
unset(_CUDA_LIBRARY_DIR)
unset(_CUDA_TARGET_DIR)
unset(_CUDA_TARGET_NAME)
elseif(CMAKE_CUDA_COMPILER_ID STREQUAL "NVIDIA")
include(Internal/CMakeNVCCParseImplicitInfo)
# Parse CMAKE_CUDA_COMPILER_PRODUCED_OUTPUT to get:
# - CMAKE_CUDA_ARCHITECTURES_DEFAULT
# - CMAKE_CUDA_HOST_IMPLICIT_LINK_DIRECTORIES
# - CMAKE_CUDA_HOST_IMPLICIT_LINK_FRAMEWORK_DIRECTORIES
# - CMAKE_CUDA_HOST_IMPLICIT_LINK_LIBRARIES
# - CMAKE_CUDA_HOST_LINK_LAUNCHER
# - CMAKE_CUDA_RUNTIME_LIBRARY_DEFAULT
# - CMAKE_CUDA_TOOLKIT_INCLUDE_DIRECTORIES
# Match arguments with cmake_nvcc_filter_implicit_info call in CMakeTestCUDACompiler.
cmake_nvcc_parse_implicit_info(CUDA CMAKE_CUDA_)
set(_SET_CMAKE_CUDA_RUNTIME_LIBRARY_DEFAULT
"set(CMAKE_CUDA_RUNTIME_LIBRARY_DEFAULT \"${CMAKE_CUDA_RUNTIME_LIBRARY_DEFAULT}\")")
endif()
include(Internal/CMakeCUDAFilterImplicitLibs)
# Filter out implicit link libraries that should not be passed unconditionally.
cmake_cuda_filter_implicit_libs(CMAKE_CUDA_HOST_IMPLICIT_LINK_LIBRARIES)
if(CMAKE_CUDA_COMPILER_SYSROOT)
string(CONCAT _SET_CMAKE_CUDA_COMPILER_SYSROOT
"set(CMAKE_CUDA_COMPILER_SYSROOT \"${CMAKE_CUDA_COMPILER_SYSROOT}\")\n"
"set(CMAKE_COMPILER_SYSROOT \"${CMAKE_CUDA_COMPILER_SYSROOT}\")")
else()
set(_SET_CMAKE_CUDA_COMPILER_SYSROOT "")
endif()
# If the user did not set CMAKE_CUDA_ARCHITECTURES, use the compiler's default.
if("${CMAKE_CUDA_ARCHITECTURES}" STREQUAL "")
cmake_policy(GET CMP0104 _CUDA_CMP0104)
if(NOT CMAKE_CUDA_COMPILER_ID STREQUAL "NVIDIA" OR _CUDA_CMP0104 STREQUAL "NEW")
set(CMAKE_CUDA_ARCHITECTURES "${CMAKE_CUDA_ARCHITECTURES_DEFAULT}" CACHE STRING "CUDA architectures")
if(NOT CMAKE_CUDA_ARCHITECTURES)
message(FATAL_ERROR "Failed to detect a default CUDA architecture.\n\nCompiler output:\n${CMAKE_CUDA_COMPILER_PRODUCED_OUTPUT}")
endif()
endif()
endif()
unset(CMAKE_CUDA_ARCHITECTURES_DEFAULT)
# configure all variables set in this file
configure_file(${CMAKE_ROOT}/Modules/CMakeCUDACompiler.cmake.in
${CMAKE_PLATFORM_INFO_DIR}/CMakeCUDACompiler.cmake
@ONLY
)
set(CMAKE_CUDA_COMPILER_ENV_VAR "CUDACXX")
set(CMAKE_CUDA_HOST_COMPILER_ENV_VAR "CUDAHOSTCXX")