[Openmp-dev] LIBOMP: TSAN functionality requested but not available

[Jan Studený via Openmp-dev]

Hello everyone,
As the default clang is outputting false positives when running openmp program I wanted to compile openmp with TSAN (thread sanitizer) support. Unfortunately when I tried to compile openmp I got an error that says: "TSAN functionality requested but not available". What does it mean not available? Should I install something extra (what if it is the case)? (maybe helps: currently when compiling`clang -fsanitize=thread  -g -O1 tiny_race.c` I get no error). Running on macOS 10.14.4 (18E226). Here is the output of `cmake -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ -DLIBOMP_TSAN_SUPPORT=1 ../openmp` (the openmp repository is cloned from https://github.com/llvm/llvm-project):

Thank you for any hints how to fix this error.
Regards,
Jan

-- The C compiler identification is Clang 8.0.0
-- The CXX compiler identification is Clang 8.0.0
-- Check for working C compiler: /usr/local/opt/llvm/bin/clang
-- Check for working C compiler: /usr/local/opt/llvm/bin/clang -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/local/opt/llvm/bin/clang++
-- Check for working CXX compiler: /usr/local/opt/llvm/bin/clang++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Performing Test OPENMP_HAVE_WERROR_FLAG
-- Performing Test OPENMP_HAVE_WERROR_FLAG - Success
-- Performing Test OPENMP_HAVE_STD_GNUPP11_FLAG
-- Performing Test OPENMP_HAVE_STD_GNUPP11_FLAG - Success
-- Performing Test OPENMP_HAVE_STD_CPP11_FLAG
-- Performing Test OPENMP_HAVE_STD_CPP11_FLAG - Success
-- Found PythonInterp: /usr/bin/python (found version "2.7.10")
-- Cannot find llvm-lit.
-- 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.
CMake Warning at cmake/OpenMPTesting.cmake:22 (message):
  The check targets will not be available!
Call Stack (most recent call first):
  cmake/OpenMPTesting.cmake:40 (find_standalone_test_dependencies)
  CMakeLists.txt:49 (include)


-- Performing Test LIBOMP_HAVE_FNO_EXCEPTIONS_FLAG
-- Performing Test LIBOMP_HAVE_FNO_EXCEPTIONS_FLAG - Success
-- Performing Test LIBOMP_HAVE_FNO_RTTI_FLAG
-- Performing Test LIBOMP_HAVE_FNO_RTTI_FLAG - Success
-- Performing Test LIBOMP_HAVE_X_CPP_FLAG
-- Performing Test LIBOMP_HAVE_X_CPP_FLAG - Success
-- Performing Test LIBOMP_HAVE_WCAST_QUAL_FLAG
-- Performing Test LIBOMP_HAVE_WCAST_QUAL_FLAG - Success
-- Performing Test LIBOMP_HAVE_WNO_UNUSED_FUNCTION_FLAG
-- Performing Test LIBOMP_HAVE_WNO_UNUSED_FUNCTION_FLAG - Success
-- Performing Test LIBOMP_HAVE_WNO_UNUSED_LOCAL_TYPEDEF_FLAG
-- Performing Test LIBOMP_HAVE_WNO_UNUSED_LOCAL_TYPEDEF_FLAG - Success
-- Performing Test LIBOMP_HAVE_WNO_UNUSED_VALUE_FLAG
-- Performing Test LIBOMP_HAVE_WNO_UNUSED_VALUE_FLAG - Success
-- Performing Test LIBOMP_HAVE_WNO_UNUSED_VARIABLE_FLAG
-- Performing Test LIBOMP_HAVE_WNO_UNUSED_VARIABLE_FLAG - Success
-- Performing Test LIBOMP_HAVE_WNO_SWITCH_FLAG
-- Performing Test LIBOMP_HAVE_WNO_SWITCH_FLAG - Success
-- Performing Test LIBOMP_HAVE_WNO_COVERED_SWITCH_DEFAULT_FLAG
-- Performing Test LIBOMP_HAVE_WNO_COVERED_SWITCH_DEFAULT_FLAG - Success
-- Performing Test LIBOMP_HAVE_WNO_DEPRECATED_REGISTER_FLAG
-- Performing Test LIBOMP_HAVE_WNO_DEPRECATED_REGISTER_FLAG - Success
-- Performing Test LIBOMP_HAVE_WNO_SIGN_COMPARE_FLAG
-- Performing Test LIBOMP_HAVE_WNO_SIGN_COMPARE_FLAG - Success
-- Performing Test LIBOMP_HAVE_WNO_GNU_ANONYMOUS_STRUCT_FLAG
-- Performing Test LIBOMP_HAVE_WNO_GNU_ANONYMOUS_STRUCT_FLAG - Success
-- Performing Test LIBOMP_HAVE_WNO_UNKNOWN_PRAGMAS_FLAG
-- Performing Test LIBOMP_HAVE_WNO_UNKNOWN_PRAGMAS_FLAG - Success
-- Performing Test LIBOMP_HAVE_WNO_MISSING_FIELD_INITIALIZERS_FLAG
-- Performing Test LIBOMP_HAVE_WNO_MISSING_FIELD_INITIALIZERS_FLAG - Success
-- Performing Test LIBOMP_HAVE_WNO_MISSING_BRACES_FLAG
-- Performing Test LIBOMP_HAVE_WNO_MISSING_BRACES_FLAG - Success
-- Performing Test LIBOMP_HAVE_WNO_COMMENT_FLAG
-- Performing Test LIBOMP_HAVE_WNO_COMMENT_FLAG - Success
-- Performing Test LIBOMP_HAVE_WNO_SELF_ASSIGN_FLAG
-- Performing Test LIBOMP_HAVE_WNO_SELF_ASSIGN_FLAG - Success
-- Performing Test LIBOMP_HAVE_WNO_VLA_EXTENSION_FLAG
-- Performing Test LIBOMP_HAVE_WNO_VLA_EXTENSION_FLAG - Success
-- Performing Test LIBOMP_HAVE_WNO_FORMAT_PEDANTIC_FLAG
-- Performing Test LIBOMP_HAVE_WNO_FORMAT_PEDANTIC_FLAG - Success
-- Performing Test LIBOMP_HAVE_WSTRINGOP_OVERFLOW_FLAG
-- Performing Test LIBOMP_HAVE_WSTRINGOP_OVERFLOW_FLAG - Failed
-- Performing Test LIBOMP_HAVE_MSSE2_FLAG
-- Performing Test LIBOMP_HAVE_MSSE2_FLAG - Success
-- Performing Test LIBOMP_HAVE_FTLS_MODEL_FLAG
-- Performing Test LIBOMP_HAVE_FTLS_MODEL_FLAG - Success
-- Performing Test LIBOMP_HAVE_MMIC_FLAG
-- Performing Test LIBOMP_HAVE_MMIC_FLAG - Failed
-- Performing Test LIBOMP_HAVE_M32_FLAG
-- Performing Test LIBOMP_HAVE_M32_FLAG - Failed
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Looking for pthread_create
-- Looking for pthread_create - found
-- Found Threads: TRUE
-- Found Perl: /usr/bin/perl (found version "5.18.2")
-- Performing Test LIBOMP_HAVE_VERSION_SYMBOLS
-- Performing Test LIBOMP_HAVE_VERSION_SYMBOLS - Failed
-- Performing Test LIBOMP_HAVE___BUILTIN_FRAME_ADDRESS
-- Performing Test LIBOMP_HAVE___BUILTIN_FRAME_ADDRESS - Success
-- Performing Test LIBOMP_HAVE_WEAK_ATTRIBUTE
-- Performing Test LIBOMP_HAVE_WEAK_ATTRIBUTE - Success
-- Looking for include files windows.h, psapi.h
-- Looking for include files windows.h, psapi.h - not found
-- Looking for EnumProcessModules in psapi
-- Looking for EnumProcessModules in psapi - not found
CMake Error at runtime/cmake/LibompUtils.cmake:26 (message):
  LIBOMP: TSAN functionality requested but not available
Call Stack (most recent call first):
  runtime/CMakeLists.txt:325 (libomp_error_say)


-- Configuring incomplete, errors occurred!
See also "/tmp/llvm-project/build/CMakeFiles/CMakeOutput.log".
See also "/tmp/llvm-project/build/CMakeFiles/CMakeError.log".
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