openmp/cmake/OpenMPTesting.cmake - llvm-project - Git at Google

 # Keep track if we have all dependencies.
 set(ENABLE_CHECK_TARGETS TRUE)

 # Function to find required dependencies for testing.
 function(find_standalone_test_dependencies)
   find_package (Python3 COMPONENTS Interpreter)

   if (NOT Python3_Interpreter_FOUND)
     message(STATUS "Could not find Python.")
     message(WARNING "The check targets will not be available!")
     set(ENABLE_CHECK_TARGETS FALSE PARENT_SCOPE)
     return()
   else()
     set(Python3_EXECUTABLE ${Python3_EXECUTABLE} PARENT_SCOPE)
   endif()

   # Find executables.
   find_program(OPENMP_LLVM_LIT_EXECUTABLE
     NAMES llvm-lit.py llvm-lit lit.py lit
     PATHS ${OPENMP_LLVM_TOOLS_DIR})
   if (NOT OPENMP_LLVM_LIT_EXECUTABLE)
     message(STATUS "Cannot find llvm-lit.")
     message(STATUS "Please put llvm-lit in your PATH, set OPENMP_LLVM_LIT_EXECUTABLE to its full path, or point OPENMP_LLVM_TOOLS_DIR to its directory.")
     message(WARNING "The check targets will not be available!")
     set(ENABLE_CHECK_TARGETS FALSE PARENT_SCOPE)
     return()
   endif()

   find_program(OPENMP_FILECHECK_EXECUTABLE
     NAMES FileCheck
     PATHS ${OPENMP_LLVM_TOOLS_DIR})
   if (NOT OPENMP_FILECHECK_EXECUTABLE)
     message(STATUS "Cannot find FileCheck.")
     message(STATUS "Please put FileCheck in your PATH, set OPENMP_FILECHECK_EXECUTABLE to its full path, or point OPENMP_LLVM_TOOLS_DIR to its directory.")
     message(WARNING "The check targets will not be available!")
     set(ENABLE_CHECK_TARGETS FALSE PARENT_SCOPE)
     return()
   endif()

   find_program(OPENMP_NOT_EXECUTABLE
     NAMES not
     PATHS ${OPENMP_LLVM_TOOLS_DIR})
   if (NOT OPENMP_NOT_EXECUTABLE)
     message(STATUS "Cannot find 'not'.")
     message(STATUS "Please put 'not' in your PATH, set OPENMP_NOT_EXECUTABLE to its full path, or point OPENMP_LLVM_TOOLS_DIR to its directory.")
     message(WARNING "The check targets will not be available!")
     set(ENABLE_CHECK_TARGETS FALSE PARENT_SCOPE)
     return()
   endif()
 endfunction()

 if (${OPENMP_STANDALONE_BUILD})
   find_standalone_test_dependencies()

   # Set lit arguments.
   set(DEFAULT_LIT_ARGS "-sv --show-unsupported --show-xfail")
   if (MSVC OR XCODE)
     set(DEFAULT_LIT_ARGS "${DEFAULT_LIT_ARGS} --no-progress-bar")
   endif()
   if ("${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
     set(DEFAULT_LIT_ARGS "${DEFAULT_LIT_ARGS} --time-tests --timeout=3000")
   endif()
   set(OPENMP_LIT_ARGS "${DEFAULT_LIT_ARGS}" CACHE STRING "Options for lit.")
   separate_arguments(OPENMP_LIT_ARGS)
 else()
   if (NOT TARGET "FileCheck")
     message(STATUS "Cannot find 'FileCheck'.")
     message(WARNING "The check targets will not be available!")
     set(ENABLE_CHECK_TARGETS FALSE)
   else()
     set(OPENMP_FILECHECK_EXECUTABLE ${LLVM_RUNTIME_OUTPUT_INTDIR}/FileCheck)
   endif()
   set(OPENMP_NOT_EXECUTABLE ${LLVM_RUNTIME_OUTPUT_INTDIR}/not)
 endif()

 # Macro to extract information about compiler from file. (no own scope)
 macro(extract_test_compiler_information lang file)
   file(READ ${file} information)
   list(GET information 0 path)
   list(GET information 1 id)
   list(GET information 2 version)
   list(GET information 3 openmp_flags)
   list(GET information 4 has_tsan_flags)
   list(GET information 5 has_omit_frame_pointer_flags)
   list(GET information 6 has_omp_h)

   set(OPENMP_TEST_${lang}_COMPILER_PATH ${path})
   set(OPENMP_TEST_${lang}_COMPILER_ID ${id})
   set(OPENMP_TEST_${lang}_COMPILER_VERSION ${version})
   set(OPENMP_TEST_${lang}_COMPILER_OPENMP_FLAGS ${openmp_flags})
   set(OPENMP_TEST_${lang}_COMPILER_HAS_TSAN_FLAGS ${has_tsan_flags})
   set(OPENMP_TEST_${lang}_COMPILER_HAS_OMIT_FRAME_POINTER_FLAGS ${has_omit_frame_pointer_flags})
   set(OPENMP_TEST_${lang}_COMPILER_HAS_OMP_H ${has_omp_h})
 endmacro()

 # Function to set variables with information about the test compiler.
 function(set_test_compiler_information dir)
   extract_test_compiler_information(C ${dir}/CCompilerInformation.txt)
   extract_test_compiler_information(CXX ${dir}/CXXCompilerInformation.txt)
   if (NOT("${OPENMP_TEST_C_COMPILER_ID}" STREQUAL "${OPENMP_TEST_CXX_COMPILER_ID}" AND
           "${OPENMP_TEST_C_COMPILER_VERSION}" STREQUAL "${OPENMP_TEST_CXX_COMPILER_VERSION}"))
     message(STATUS "Test compilers for C and C++ don't match.")
     message(WARNING "The check targets will not be available!")
     set(ENABLE_CHECK_TARGETS FALSE PARENT_SCOPE)
   else()
     set(OPENMP_TEST_COMPILER_ID "${OPENMP_TEST_C_COMPILER_ID}" PARENT_SCOPE)
     set(OPENMP_TEST_COMPILER_VERSION "${OPENMP_TEST_C_COMPILER_VERSION}" PARENT_SCOPE)
     set(OPENMP_TEST_COMPILER_OPENMP_FLAGS "${OPENMP_TEST_C_COMPILER_OPENMP_FLAGS}" PARENT_SCOPE)
     set(OPENMP_TEST_COMPILER_HAS_TSAN_FLAGS "${OPENMP_TEST_C_COMPILER_HAS_TSAN_FLAGS}" PARENT_SCOPE)
     set(OPENMP_TEST_COMPILER_HAS_OMIT_FRAME_POINTER_FLAGS "${OPENMP_TEST_C_COMPILER_HAS_OMIT_FRAME_POINTER_FLAGS}" PARENT_SCOPE)
     set(OPENMP_TEST_COMPILER_HAS_OMP_H "${OPENMP_TEST_C_COMPILER_HAS_OMP_H}" PARENT_SCOPE)

     # Determine major version.
     string(REGEX MATCH "[0-9]+" major "${OPENMP_TEST_C_COMPILER_VERSION}")
     string(REGEX MATCH "[0-9]+\\.[0-9]+" majorminor "${OPENMP_TEST_C_COMPILER_VERSION}")
     set(OPENMP_TEST_COMPILER_VERSION_MAJOR "${major}" PARENT_SCOPE)
     set(OPENMP_TEST_COMPILER_VERSION_MAJOR_MINOR "${majorminor}" PARENT_SCOPE)
   endif()
 endfunction()

 if (${OPENMP_STANDALONE_BUILD})
   # Detect compiler that should be used for testing.
   # We cannot use ExternalProject_Add() because its configuration runs when this
   # project is built which is too late for detecting the compiler...
   file(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/DetectTestCompiler)
   execute_process(
     COMMAND ${CMAKE_COMMAND} -G${CMAKE_GENERATOR} ${CMAKE_CURRENT_LIST_DIR}/DetectTestCompiler
       -DCMAKE_C_COMPILER=${OPENMP_TEST_C_COMPILER}
       -DCMAKE_CXX_COMPILER=${OPENMP_TEST_CXX_COMPILER}
     WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/DetectTestCompiler
     OUTPUT_VARIABLE DETECT_COMPILER_OUT
     ERROR_VARIABLE DETECT_COMPILER_ERR
     RESULT_VARIABLE DETECT_COMPILER_RESULT)
   if (DETECT_COMPILER_RESULT)
     message(STATUS "Could not detect test compilers.")
     message(WARNING "The check targets will not be available!")
     set(ENABLE_CHECK_TARGETS FALSE)
   else()
     set_test_compiler_information(${CMAKE_CURRENT_BINARY_DIR}/DetectTestCompiler)
   endif()
 else()
   # Set the information that we know.
   set(OPENMP_TEST_COMPILER_ID "Clang")
   # Cannot use CLANG_VERSION because we are not guaranteed that this is already set.
   set(OPENMP_TEST_COMPILER_VERSION "${LLVM_VERSION}")
   set(OPENMP_TEST_COMPILER_VERSION_MAJOR "${LLVM_VERSION_MAJOR}")
   set(OPENMP_TEST_COMPILER_VERSION_MAJOR_MINOR "${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}")
   # Unfortunately the top-level cmake/config-ix.cmake file mangles CMake's
   # CMAKE_THREAD_LIBS_INIT variable from the FindThreads package, so work
   # around that, until it is fixed there.
   if("${CMAKE_THREAD_LIBS_INIT}" STREQUAL "-lpthread")
     set(OPENMP_TEST_COMPILER_THREAD_FLAGS "-pthread")
   else()
     set(OPENMP_TEST_COMPILER_THREAD_FLAGS "${CMAKE_THREAD_LIBS_INIT}")
   endif()
   if(TARGET tsan)
     set(OPENMP_TEST_COMPILER_HAS_TSAN_FLAGS 1)
   else()
     set(OPENMP_TEST_COMPILER_HAS_TSAN_FLAGS 0)
   endif()
   set(OPENMP_TEST_COMPILER_HAS_OMP_H 1)
   set(OPENMP_TEST_COMPILER_OPENMP_FLAGS "-fopenmp ${OPENMP_TEST_COMPILER_THREAD_FLAGS}")
   set(OPENMP_TEST_COMPILER_HAS_OMIT_FRAME_POINTER_FLAGS 1)
 endif()

 set(OPENMP_TEST_ENABLE_TSAN "${OPENMP_TEST_COMPILER_HAS_TSAN_FLAGS}" CACHE BOOL
     "Whether to enable tests using tsan")

 # Function to set compiler features for use in lit.
 function(update_test_compiler_features)
   set(FEATURES "[")
   set(first TRUE)
   foreach(feat IN LISTS OPENMP_TEST_COMPILER_FEATURE_LIST)
     if (NOT first)
       string(APPEND FEATURES ", ")
     endif()
     set(first FALSE)
     string(APPEND FEATURES "'${feat}'")
   endforeach()
   string(APPEND FEATURES "]")
   set(OPENMP_TEST_COMPILER_FEATURES ${FEATURES} PARENT_SCOPE)
 endfunction()

 function(set_test_compiler_features)
   if ("${OPENMP_TEST_COMPILER_ID}" STREQUAL "GNU")
     set(comp "gcc")
   elseif ("${OPENMP_TEST_COMPILER_ID}" STREQUAL "Intel")
     set(comp "icc")
   else()
     # Just use the lowercase of the compiler ID as fallback.
     string(TOLOWER "${OPENMP_TEST_COMPILER_ID}" comp)
   endif()
   set(OPENMP_TEST_COMPILER_FEATURE_LIST ${comp} ${comp}-${OPENMP_TEST_COMPILER_VERSION_MAJOR} ${comp}-${OPENMP_TEST_COMPILER_VERSION_MAJOR_MINOR} ${comp}-${OPENMP_TEST_COMPILER_VERSION} PARENT_SCOPE)
 endfunction()
 set_test_compiler_features()
 update_test_compiler_features()

 # Function to add a testsuite for an OpenMP runtime library.
 function(add_openmp_testsuite target comment)
   if (NOT ENABLE_CHECK_TARGETS)
     add_custom_target(${target}
       COMMAND ${CMAKE_COMMAND} -E echo "${target} does nothing, dependencies not found.")
     message(STATUS "${target} does nothing.")
     return()
   endif()

   cmake_parse_arguments(ARG "EXCLUDE_FROM_CHECK_ALL" "" "DEPENDS;ARGS" ${ARGN})
   # EXCLUDE_FROM_CHECK_ALL excludes the test ${target} out of check-openmp.
   if (NOT ARG_EXCLUDE_FROM_CHECK_ALL)
     # Register the testsuites and depends for the check-openmp rule.
     set_property(GLOBAL APPEND PROPERTY OPENMP_LIT_TESTSUITES ${ARG_UNPARSED_ARGUMENTS})
     set_property(GLOBAL APPEND PROPERTY OPENMP_LIT_DEPENDS ${ARG_DEPENDS})
   endif()

   if (${OPENMP_STANDALONE_BUILD})
     set(LIT_ARGS ${OPENMP_LIT_ARGS} ${ARG_ARGS})
     add_custom_target(${target}
       COMMAND ${Python3_EXECUTABLE} ${OPENMP_LLVM_LIT_EXECUTABLE} ${LIT_ARGS} ${ARG_UNPARSED_ARGUMENTS}
       COMMENT ${comment}
       DEPENDS ${ARG_DEPENDS}
       USES_TERMINAL
     )
   else()
     if (ARG_EXCLUDE_FROM_CHECK_ALL)
       add_lit_testsuite(${target}
         ${comment}
         ${ARG_UNPARSED_ARGUMENTS}
         EXCLUDE_FROM_CHECK_ALL
         DEPENDS clang FileCheck not ${ARG_DEPENDS}
         ARGS ${ARG_ARGS}
       )
     else()
       add_lit_testsuite(${target}
         ${comment}
         ${ARG_UNPARSED_ARGUMENTS}
         DEPENDS clang FileCheck not ${ARG_DEPENDS}
         ARGS ${ARG_ARGS}
       )
     endif()
   endif()
 endfunction()

 function(construct_check_openmp_target)
   get_property(OPENMP_LIT_TESTSUITES GLOBAL PROPERTY OPENMP_LIT_TESTSUITES)
   get_property(OPENMP_LIT_DEPENDS GLOBAL PROPERTY OPENMP_LIT_DEPENDS)

   # We already added the testsuites themselves, no need to do that again.
   add_openmp_testsuite(check-openmp "Running OpenMP tests" ${OPENMP_LIT_TESTSUITES} EXCLUDE_FROM_CHECK_ALL DEPENDS ${OPENMP_LIT_DEPENDS})
 endfunction()
	# Keep track if we have all dependencies.
	set(ENABLE_CHECK_TARGETS TRUE)

	# Function to find required dependencies for testing.
	function(find_standalone_test_dependencies)
	find_package (Python3 COMPONENTS Interpreter)

	if (NOT Python3_Interpreter_FOUND)
	message(STATUS "Could not find Python.")
	message(WARNING "The check targets will not be available!")
	set(ENABLE_CHECK_TARGETS FALSE PARENT_SCOPE)
	return()
	else()
	set(Python3_EXECUTABLE ${Python3_EXECUTABLE} PARENT_SCOPE)
	endif()

	# Find executables.
	find_program(OPENMP_LLVM_LIT_EXECUTABLE
	NAMES llvm-lit.py llvm-lit lit.py lit
	PATHS ${OPENMP_LLVM_TOOLS_DIR})
	if (NOT OPENMP_LLVM_LIT_EXECUTABLE)
	message(STATUS "Cannot find llvm-lit.")
	message(STATUS "Please put llvm-lit in your PATH, set OPENMP_LLVM_LIT_EXECUTABLE to its full path, or point OPENMP_LLVM_TOOLS_DIR to its directory.")
	message(WARNING "The check targets will not be available!")
	set(ENABLE_CHECK_TARGETS FALSE PARENT_SCOPE)
	return()
	endif()

	find_program(OPENMP_FILECHECK_EXECUTABLE
	NAMES FileCheck
	PATHS ${OPENMP_LLVM_TOOLS_DIR})
	if (NOT OPENMP_FILECHECK_EXECUTABLE)
	message(STATUS "Cannot find FileCheck.")
	message(STATUS "Please put FileCheck in your PATH, set OPENMP_FILECHECK_EXECUTABLE to its full path, or point OPENMP_LLVM_TOOLS_DIR to its directory.")
	message(WARNING "The check targets will not be available!")
	set(ENABLE_CHECK_TARGETS FALSE PARENT_SCOPE)
	return()
	endif()

	find_program(OPENMP_NOT_EXECUTABLE
	NAMES not
	PATHS ${OPENMP_LLVM_TOOLS_DIR})
	if (NOT OPENMP_NOT_EXECUTABLE)
	message(STATUS "Cannot find 'not'.")
	message(STATUS "Please put 'not' in your PATH, set OPENMP_NOT_EXECUTABLE to its full path, or point OPENMP_LLVM_TOOLS_DIR to its directory.")
	message(WARNING "The check targets will not be available!")
	set(ENABLE_CHECK_TARGETS FALSE PARENT_SCOPE)
	return()
	endif()
	endfunction()

	if (${OPENMP_STANDALONE_BUILD})
	find_standalone_test_dependencies()

	# Set lit arguments.
	set(DEFAULT_LIT_ARGS "-sv --show-unsupported --show-xfail")
	if (MSVC OR XCODE)
	set(DEFAULT_LIT_ARGS "${DEFAULT_LIT_ARGS} --no-progress-bar")
	endif()
	if ("${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
	set(DEFAULT_LIT_ARGS "${DEFAULT_LIT_ARGS} --time-tests --timeout=3000")
	endif()
	set(OPENMP_LIT_ARGS "${DEFAULT_LIT_ARGS}" CACHE STRING "Options for lit.")
	separate_arguments(OPENMP_LIT_ARGS)
	else()
	if (NOT TARGET "FileCheck")
	message(STATUS "Cannot find 'FileCheck'.")
	message(WARNING "The check targets will not be available!")
	set(ENABLE_CHECK_TARGETS FALSE)
	else()
	set(OPENMP_FILECHECK_EXECUTABLE ${LLVM_RUNTIME_OUTPUT_INTDIR}/FileCheck)
	endif()
	set(OPENMP_NOT_EXECUTABLE ${LLVM_RUNTIME_OUTPUT_INTDIR}/not)
	endif()

	# Macro to extract information about compiler from file. (no own scope)
	macro(extract_test_compiler_information lang file)
	file(READ ${file} information)
	list(GET information 0 path)
	list(GET information 1 id)
	list(GET information 2 version)
	list(GET information 3 openmp_flags)
	list(GET information 4 has_tsan_flags)
	list(GET information 5 has_omit_frame_pointer_flags)
	list(GET information 6 has_omp_h)

	set(OPENMP_TEST_${lang}_COMPILER_PATH ${path})
	set(OPENMP_TEST_${lang}_COMPILER_ID ${id})
	set(OPENMP_TEST_${lang}_COMPILER_VERSION ${version})
	set(OPENMP_TEST_${lang}_COMPILER_OPENMP_FLAGS ${openmp_flags})
	set(OPENMP_TEST_${lang}_COMPILER_HAS_TSAN_FLAGS ${has_tsan_flags})
	set(OPENMP_TEST_${lang}_COMPILER_HAS_OMIT_FRAME_POINTER_FLAGS ${has_omit_frame_pointer_flags})
	set(OPENMP_TEST_${lang}_COMPILER_HAS_OMP_H ${has_omp_h})
	endmacro()

	# Function to set variables with information about the test compiler.
	function(set_test_compiler_information dir)
	extract_test_compiler_information(C ${dir}/CCompilerInformation.txt)
	extract_test_compiler_information(CXX ${dir}/CXXCompilerInformation.txt)
	if (NOT("${OPENMP_TEST_C_COMPILER_ID}" STREQUAL "${OPENMP_TEST_CXX_COMPILER_ID}" AND
	"${OPENMP_TEST_C_COMPILER_VERSION}" STREQUAL "${OPENMP_TEST_CXX_COMPILER_VERSION}"))
	message(STATUS "Test compilers for C and C++ don't match.")
	message(WARNING "The check targets will not be available!")
	set(ENABLE_CHECK_TARGETS FALSE PARENT_SCOPE)
	else()
	set(OPENMP_TEST_COMPILER_ID "${OPENMP_TEST_C_COMPILER_ID}" PARENT_SCOPE)
	set(OPENMP_TEST_COMPILER_VERSION "${OPENMP_TEST_C_COMPILER_VERSION}" PARENT_SCOPE)
	set(OPENMP_TEST_COMPILER_OPENMP_FLAGS "${OPENMP_TEST_C_COMPILER_OPENMP_FLAGS}" PARENT_SCOPE)
	set(OPENMP_TEST_COMPILER_HAS_TSAN_FLAGS "${OPENMP_TEST_C_COMPILER_HAS_TSAN_FLAGS}" PARENT_SCOPE)
	set(OPENMP_TEST_COMPILER_HAS_OMIT_FRAME_POINTER_FLAGS "${OPENMP_TEST_C_COMPILER_HAS_OMIT_FRAME_POINTER_FLAGS}" PARENT_SCOPE)
	set(OPENMP_TEST_COMPILER_HAS_OMP_H "${OPENMP_TEST_C_COMPILER_HAS_OMP_H}" PARENT_SCOPE)

	# Determine major version.
	string(REGEX MATCH "[0-9]+" major "${OPENMP_TEST_C_COMPILER_VERSION}")
	string(REGEX MATCH "[0-9]+\\.[0-9]+" majorminor "${OPENMP_TEST_C_COMPILER_VERSION}")
	set(OPENMP_TEST_COMPILER_VERSION_MAJOR "${major}" PARENT_SCOPE)
	set(OPENMP_TEST_COMPILER_VERSION_MAJOR_MINOR "${majorminor}" PARENT_SCOPE)
	endif()
	endfunction()

	if (${OPENMP_STANDALONE_BUILD})
	# Detect compiler that should be used for testing.
	# We cannot use ExternalProject_Add() because its configuration runs when this
	# project is built which is too late for detecting the compiler...
	file(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/DetectTestCompiler)
	execute_process(
	COMMAND ${CMAKE_COMMAND} -G${CMAKE_GENERATOR} ${CMAKE_CURRENT_LIST_DIR}/DetectTestCompiler
	-DCMAKE_C_COMPILER=${OPENMP_TEST_C_COMPILER}
	-DCMAKE_CXX_COMPILER=${OPENMP_TEST_CXX_COMPILER}
	WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/DetectTestCompiler
	OUTPUT_VARIABLE DETECT_COMPILER_OUT
	ERROR_VARIABLE DETECT_COMPILER_ERR
	RESULT_VARIABLE DETECT_COMPILER_RESULT)
	if (DETECT_COMPILER_RESULT)
	message(STATUS "Could not detect test compilers.")
	message(WARNING "The check targets will not be available!")
	set(ENABLE_CHECK_TARGETS FALSE)
	else()
	set_test_compiler_information(${CMAKE_CURRENT_BINARY_DIR}/DetectTestCompiler)
	endif()
	else()
	# Set the information that we know.
	set(OPENMP_TEST_COMPILER_ID "Clang")
	# Cannot use CLANG_VERSION because we are not guaranteed that this is already set.
	set(OPENMP_TEST_COMPILER_VERSION "${LLVM_VERSION}")
	set(OPENMP_TEST_COMPILER_VERSION_MAJOR "${LLVM_VERSION_MAJOR}")
	set(OPENMP_TEST_COMPILER_VERSION_MAJOR_MINOR "${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}")
	# Unfortunately the top-level cmake/config-ix.cmake file mangles CMake's
	# CMAKE_THREAD_LIBS_INIT variable from the FindThreads package, so work
	# around that, until it is fixed there.
	if("${CMAKE_THREAD_LIBS_INIT}" STREQUAL "-lpthread")
	set(OPENMP_TEST_COMPILER_THREAD_FLAGS "-pthread")
	else()
	set(OPENMP_TEST_COMPILER_THREAD_FLAGS "${CMAKE_THREAD_LIBS_INIT}")
	endif()
	if(TARGET tsan)
	set(OPENMP_TEST_COMPILER_HAS_TSAN_FLAGS 1)
	else()
	set(OPENMP_TEST_COMPILER_HAS_TSAN_FLAGS 0)
	endif()
	set(OPENMP_TEST_COMPILER_HAS_OMP_H 1)
	set(OPENMP_TEST_COMPILER_OPENMP_FLAGS "-fopenmp ${OPENMP_TEST_COMPILER_THREAD_FLAGS}")
	set(OPENMP_TEST_COMPILER_HAS_OMIT_FRAME_POINTER_FLAGS 1)
	endif()

	set(OPENMP_TEST_ENABLE_TSAN "${OPENMP_TEST_COMPILER_HAS_TSAN_FLAGS}" CACHE BOOL
	"Whether to enable tests using tsan")

	# Function to set compiler features for use in lit.
	function(update_test_compiler_features)
	set(FEATURES "[")
	set(first TRUE)
	foreach(feat IN LISTS OPENMP_TEST_COMPILER_FEATURE_LIST)
	if (NOT first)
	string(APPEND FEATURES ", ")
	endif()
	set(first FALSE)
	string(APPEND FEATURES "'${feat}'")
	endforeach()
	string(APPEND FEATURES "]")
	set(OPENMP_TEST_COMPILER_FEATURES ${FEATURES} PARENT_SCOPE)
	endfunction()

	function(set_test_compiler_features)
	if ("${OPENMP_TEST_COMPILER_ID}" STREQUAL "GNU")
	set(comp "gcc")
	elseif ("${OPENMP_TEST_COMPILER_ID}" STREQUAL "Intel")
	set(comp "icc")
	else()
	# Just use the lowercase of the compiler ID as fallback.
	string(TOLOWER "${OPENMP_TEST_COMPILER_ID}" comp)
	endif()
	set(OPENMP_TEST_COMPILER_FEATURE_LIST ${comp} ${comp}-${OPENMP_TEST_COMPILER_VERSION_MAJOR} ${comp}-${OPENMP_TEST_COMPILER_VERSION_MAJOR_MINOR} ${comp}-${OPENMP_TEST_COMPILER_VERSION} PARENT_SCOPE)
	endfunction()
	set_test_compiler_features()
	update_test_compiler_features()

	# Function to add a testsuite for an OpenMP runtime library.
	function(add_openmp_testsuite target comment)
	if (NOT ENABLE_CHECK_TARGETS)
	add_custom_target(${target}
	COMMAND ${CMAKE_COMMAND} -E echo "${target} does nothing, dependencies not found.")
	message(STATUS "${target} does nothing.")
	return()
	endif()

	cmake_parse_arguments(ARG "EXCLUDE_FROM_CHECK_ALL" "" "DEPENDS;ARGS" ${ARGN})
	# EXCLUDE_FROM_CHECK_ALL excludes the test ${target} out of check-openmp.
	if (NOT ARG_EXCLUDE_FROM_CHECK_ALL)
	# Register the testsuites and depends for the check-openmp rule.
	set_property(GLOBAL APPEND PROPERTY OPENMP_LIT_TESTSUITES ${ARG_UNPARSED_ARGUMENTS})
	set_property(GLOBAL APPEND PROPERTY OPENMP_LIT_DEPENDS ${ARG_DEPENDS})
	endif()

	if (${OPENMP_STANDALONE_BUILD})
	set(LIT_ARGS ${OPENMP_LIT_ARGS} ${ARG_ARGS})
	add_custom_target(${target}
	COMMAND ${Python3_EXECUTABLE} ${OPENMP_LLVM_LIT_EXECUTABLE} ${LIT_ARGS} ${ARG_UNPARSED_ARGUMENTS}
	COMMENT ${comment}
	DEPENDS ${ARG_DEPENDS}
	USES_TERMINAL
	)
	else()
	if (ARG_EXCLUDE_FROM_CHECK_ALL)
	add_lit_testsuite(${target}
	${comment}
	${ARG_UNPARSED_ARGUMENTS}
	EXCLUDE_FROM_CHECK_ALL
	DEPENDS clang FileCheck not ${ARG_DEPENDS}
	ARGS ${ARG_ARGS}
	)
	else()
	add_lit_testsuite(${target}
	${comment}
	${ARG_UNPARSED_ARGUMENTS}
	DEPENDS clang FileCheck not ${ARG_DEPENDS}
	ARGS ${ARG_ARGS}
	)
	endif()
	endif()
	endfunction()

	function(construct_check_openmp_target)
	get_property(OPENMP_LIT_TESTSUITES GLOBAL PROPERTY OPENMP_LIT_TESTSUITES)
	get_property(OPENMP_LIT_DEPENDS GLOBAL PROPERTY OPENMP_LIT_DEPENDS)

	# We already added the testsuites themselves, no need to do that again.
	add_openmp_testsuite(check-openmp "Running OpenMP tests" ${OPENMP_LIT_TESTSUITES} EXCLUDE_FROM_CHECK_ALL DEPENDS ${OPENMP_LIT_DEPENDS})
	endfunction()