Found the following significant warnings:
  d:/RCompile/CRANpkg/lib/4.1/BH/include/boost/multiprecision/traits/std_integer_traits.hpp:31:18: warning: ISO C++ does not support '__int128' for 'type name' [-Wpedantic]
  d:/RCompile/CRANpkg/lib/4.1/BH/include/boost/multiprecision/traits/std_integer_traits.hpp:33:27: warning: ISO C++ does not support '__int128' for 'type name' [-Wpedantic]
  d:/RCompile/CRANpkg/lib/4.1/BH/include/boost/multiprecision/traits/std_integer_traits.hpp:35:20: warning: ISO C++ does not support '__int128' for 'type name' [-Wpedantic]
  d:/RCompile/CRANpkg/lib/4.1/BH/include/boost/multiprecision/traits/std_integer_traits.hpp:37:29: warning: ISO C++ does not support '__int128' for 'type name' [-Wpedantic]
  d:/RCompile/CRANpkg/lib/4.1/BH/include/boost/multiprecision/traits/std_integer_traits.hpp:39:20: warning: ISO C++ does not support '__int128' for 'type name' [-Wpedantic]
  d:/RCompile/CRANpkg/lib/4.1/BH/include/boost/multiprecision/traits/std_integer_traits.hpp:41:29: warning: ISO C++ does not support '__int128' for 'type name' [-Wpedantic]
  d:/RCompile/CRANpkg/lib/4.1/BH/include/boost/multiprecision/traits/std_integer_traits.hpp:43:22: warning: ISO C++ does not support '__int128' for 'type name' [-Wpedantic]
  d:/RCompile/CRANpkg/lib/4.1/BH/include/boost/multiprecision/traits/std_integer_traits.hpp:45:31: warning: ISO C++ does not support '__int128' for 'type name' [-Wpedantic]
  d:/RCompile/CRANpkg/lib/4.1/BH/include/boost/multiprecision/traits/std_integer_traits.hpp:47:22: warning: ISO C++ does not support '__int128' for 'type name' [-Wpedantic]
  d:/RCompile/CRANpkg/lib/4.1/BH/include/boost/multiprecision/traits/std_integer_traits.hpp:49:26: warning: ISO C++ does not support '__int128' for 'type name' [-Wpedantic]
  d:/RCompile/CRANpkg/lib/4.1/BH/include/boost/multiprecision/traits/std_integer_traits.hpp:52:31: warning: ISO C++ does not support '__int128' for 'type name' [-Wpedantic]
  d:/RCompile/CRANpkg/lib/4.1/BH/include/boost/multiprecision/traits/std_integer_traits.hpp:54:26: warning: ISO C++ does not support '__int128' for 'type name' [-Wpedantic]
  d:/RCompile/CRANpkg/lib/4.1/BH/include/boost/multiprecision/traits/std_integer_traits.hpp:57:20: warning: ISO C++ does not support '__int128' for 'type name' [-Wpedantic]
  d:/RCompile/CRANpkg/lib/4.1/BH/include/boost/multiprecision/traits/std_integer_traits.hpp:59:17: warning: ISO C++ does not support '__int128' for 'type name' [-Wpedantic]
  d:/RCompile/CRANpkg/lib/4.1/BH/include/boost/multiprecision/traits/std_integer_traits.hpp:62:29: warning: ISO C++ does not support '__int128' for 'type name' [-Wpedantic]
  d:/RCompile/CRANpkg/lib/4.1/BH/include/boost/multiprecision/traits/std_integer_traits.hpp:64:17: warning: ISO C++ does not support '__int128' for 'type name' [-Wpedantic]
  d:/RCompile/CRANpkg/lib/4.1/BH/include/boost/multiprecision/detail/default_ops.hpp:1652:25: warning: ISO C++ does not support '__int128' for 'a' [-Wpedantic]
  d:/RCompile/CRANpkg/lib/4.1/BH/include/boost/multiprecision/detail/default_ops.hpp:1652:30: warning: ISO C++ does not support '__int128' for 'b' [-Wpedantic]
  d:/RCompile/CRANpkg/lib/4.1/BH/include/boost/multiprecision/detail/default_ops.hpp:1652:35: warning: ISO C++ does not support '__int128' for 'c' [-Wpedantic]
  d:/RCompile/CRANpkg/lib/4.1/BH/include/boost/multiprecision/detail/hash.hpp:23:49: warning: ISO C++ does not support '__int128' for 'val' [-Wpedantic]
  d:/RCompile/CRANpkg/lib/4.1/BH/include/boost/multiprecision/detail/hash.hpp:25:47: warning: ISO C++ does not support '__int128' for 'val' [-Wpedantic]
  d:/RCompile/CRANpkg/lib/4.1/BH/include/boost/multiprecision/detail/hash.hpp:27:43: warning: ISO C++ does not support '__int128' for 'type name' [-Wpedantic]
  d:/RCompile/CRANpkg/lib/4.1/BH/include/boost/multiprecision/detail/hash.hpp:44:56: warning: ISO C++ does not support '__int128' for 'val' [-Wpedantic]
  d:/RCompile/CRANpkg/lib/4.1/BH/include/boost/multiprecision/integer.hpp:214:71: warning: ISO C++ does not support '__int128' for 'type name' [-Wpedantic]
See 'd:/Rcompile/CRANpkg/local/4.1/DDD.Rcheck/00install.out' for details.