cmake LLVM_HAS_NOGLOBAL_CTOR_MUTEX examples

Lewuathe/mlir-hello thirdparty/llvm-project/llvm/lib/Support/CMakeLists.txt :13 

CHECK_CXX_SOURCE_COMPILES("
  #include <mutex>
  static std::mutex TestGlobalCtorDtor;
  static std::recursive_mutex TestGlobalCtorDtor2;
  int main() { (void)TestGlobalCtorDtor; (void)TestGlobalCtorDtor2; return 0;}
  " LLVM_HAS_NOGLOBAL_CTOR_MUTEX)

root-project/root interpreter/llvm-project/llvm/lib/Support/CMakeLists.txt :13 

CHECK_CXX_SOURCE_COMPILES("
  #include <mutex>
  static std::mutex TestGlobalCtorDtor;
  static std::recursive_mutex TestGlobalCtorDtor2;
  int main() { (void)TestGlobalCtorDtor; (void)TestGlobalCtorDtor2; return 0;}
  " LLVM_HAS_NOGLOBAL_CTOR_MUTEX)