Chapter2 tinylang standalone compiled error

[dev-xdyang]

when i compile tinylang standalone it always failed with following message. But it success compiled when integrated with llvm. if anyone encounter and solve this problem?

platform information:

Apple clang version 13.0.0 (clang-1300.0.29.3)
Target: x86_64-apple-darwin20.5.0

compile command:

cmake -G Ninja \
    -DCMAKE_BUILD_TYPE=RelWithDebInfo \
    -DLLVM_DIR=/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/lib/cmake/llvm \
    -DCMAKE_INSTALL_PREFIX=../tinylang-output \
    ../tinylang/

ninja
ninja install

error message:

- The C compiler identification is AppleClang 13.0.0.13000029
-- The CXX compiler identification is AppleClang 13.0.0.13000029
-- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc
-- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc -- 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: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++
-- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found ZLIB: /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.0.sdk/usr/lib/libz.tbd (found version "1.2.11")
-- Linker detection: ld64
-- Performing Test C_SUPPORTS_FPIC
-- Performing Test C_SUPPORTS_FPIC - Success
-- Performing Test CXX_SUPPORTS_FPIC
-- Performing Test CXX_SUPPORTS_FPIC - Success
-- Building with -fPIC
-- Performing Test C_SUPPORTS_FNO_SEMANTIC_INTERPOSITION
-- Performing Test C_SUPPORTS_FNO_SEMANTIC_INTERPOSITION - Failed
-- Performing Test CXX_SUPPORTS_FNO_SEMANTIC_INTERPOSITION
-- Performing Test CXX_SUPPORTS_FNO_SEMANTIC_INTERPOSITION - Failed
-- Performing Test SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG
-- Performing Test SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG - Success
CMake Warning (dev) at /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/lib/cmake/llvm/HandleLLVMOptions.cmake:436 (option):
  Policy CMP0077 is not set: option() honors normal variables.  Run "cmake
  --help-policy CMP0077" for policy details.  Use the cmake_policy command to
  set the policy and suppress this warning.

  For compatibility with older versions of CMake, option is clearing the
  normal variable 'LLVM_ENABLE_WARNINGS'.
Call Stack (most recent call first):
  CMakeLists.txt:10 (include)
This warning is for project developers.  Use -Wno-dev to suppress it.

-- Performing Test C_SUPPORTS_WERROR_DATE_TIME
-- Performing Test C_SUPPORTS_WERROR_DATE_TIME - Success
-- Performing Test CXX_SUPPORTS_WERROR_DATE_TIME
-- Performing Test CXX_SUPPORTS_WERROR_DATE_TIME - Success
-- Performing Test C_SUPPORTS_WERROR_UNGUARDED_AVAILABILITY_NEW
-- Performing Test C_SUPPORTS_WERROR_UNGUARDED_AVAILABILITY_NEW - Success
-- Performing Test CXX_SUPPORTS_WERROR_UNGUARDED_AVAILABILITY_NEW
-- Performing Test CXX_SUPPORTS_WERROR_UNGUARDED_AVAILABILITY_NEW - Success
-- Performing Test CXX_SUPPORTS_MISSING_FIELD_INITIALIZERS_FLAG
-- Performing Test CXX_SUPPORTS_MISSING_FIELD_INITIALIZERS_FLAG - Success
-- Performing Test C_SUPPORTS_IMPLICIT_FALLTHROUGH_FLAG
-- Performing Test C_SUPPORTS_IMPLICIT_FALLTHROUGH_FLAG - Success
-- Performing Test CXX_SUPPORTS_IMPLICIT_FALLTHROUGH_FLAG
-- Performing Test CXX_SUPPORTS_IMPLICIT_FALLTHROUGH_FLAG - Success
-- Performing Test C_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG
-- Performing Test C_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG - Success
-- Performing Test CXX_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG
-- Performing Test CXX_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG - Success
-- Performing Test CXX_SUPPORTS_CLASS_MEMACCESS_FLAG
-- Performing Test CXX_SUPPORTS_CLASS_MEMACCESS_FLAG - Failed
-- Performing Test CXX_SUPPORTS_NOEXCEPT_TYPE_FLAG
-- Performing Test CXX_SUPPORTS_NOEXCEPT_TYPE_FLAG - Success
-- Performing Test CXX_WONT_WARN_ON_FINAL_NONVIRTUALDTOR
-- Performing Test CXX_WONT_WARN_ON_FINAL_NONVIRTUALDTOR - Success
-- Performing Test CXX_SUPPORTS_SUGGEST_OVERRIDE_FLAG
-- Performing Test CXX_SUPPORTS_SUGGEST_OVERRIDE_FLAG - Success
-- Performing Test CXX_WSUGGEST_OVERRIDE_ALLOWS_ONLY_FINAL
-- Performing Test CXX_WSUGGEST_OVERRIDE_ALLOWS_ONLY_FINAL - Success
-- Performing Test C_WCOMMENT_ALLOWS_LINE_WRAP
-- Performing Test C_WCOMMENT_ALLOWS_LINE_WRAP - Success
-- Performing Test C_SUPPORTS_STRING_CONVERSION_FLAG
-- Performing Test C_SUPPORTS_STRING_CONVERSION_FLAG - Success
-- Performing Test CXX_SUPPORTS_STRING_CONVERSION_FLAG
-- Performing Test CXX_SUPPORTS_STRING_CONVERSION_FLAG - Success
-- Performing Test C_SUPPORTS_MISLEADING_INDENTATION_FLAG
-- Performing Test C_SUPPORTS_MISLEADING_INDENTATION_FLAG - Success
-- Performing Test CXX_SUPPORTS_MISLEADING_INDENTATION_FLAG
-- Performing Test CXX_SUPPORTS_MISLEADING_INDENTATION_FLAG - Success
-- Performing Test LINKER_SUPPORTS_COLOR_DIAGNOSTICS
-- Performing Test LINKER_SUPPORTS_COLOR_DIAGNOSTICS - Failed
CMake Warning (dev) at /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/lib/cmake/llvm/HandleLLVMOptions.cmake:950 (option):
  Policy CMP0077 is not set: option() honors normal variables.  Run "cmake
  --help-policy CMP0077" for policy details.  Use the cmake_policy command to
  set the policy and suppress this warning.

  For compatibility with older versions of CMake, option is clearing the
  normal variable 'LLVM_ENABLE_EH'.
Call Stack (most recent call first):
  CMakeLists.txt:10 (include)
This warning is for project developers.  Use -Wno-dev to suppress it.

CMake Warning (dev) at /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/lib/cmake/llvm/HandleLLVMOptions.cmake:951 (option):
  Policy CMP0077 is not set: option() honors normal variables.  Run "cmake
  --help-policy CMP0077" for policy details.  Use the cmake_policy command to
  set the policy and suppress this warning.

  For compatibility with older versions of CMake, option is clearing the
  normal variable 'LLVM_ENABLE_RTTI'.
Call Stack (most recent call first):
  CMakeLists.txt:10 (include)
This warning is for project developers.  Use -Wno-dev to suppress it.

CMake Warning (dev) at /usr/local/Cellar/cmake/3.16.5/share/cmake/Modules/CMakeDependentOption.cmake:39 (option):
  Policy CMP0077 is not set: option() honors normal variables.  Run "cmake
  --help-policy CMP0077" for policy details.  Use the cmake_policy command to
  set the policy and suppress this warning.

  For compatibility with older versions of CMake, option is clearing the
  normal variable 'LLVM_EXPORT_SYMBOLS_FOR_PLUGINS'.
Call Stack (most recent call first):
  /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/lib/cmake/llvm/HandleLLVMOptions.cmake:1115 (CMAKE_DEPENDENT_OPTION)
  CMakeLists.txt:10 (include)
This warning is for project developers.  Use -Wno-dev to suppress it.

-- Looking for os_signpost_interval_begin
-- Looking for os_signpost_interval_begin - found
-- Performing Test macos_signposts_usable
-- Performing Test macos_signposts_usable - Success
-- Configuring done
-- Generating done
-- Build files have been written to: /Users/xdyang/Documents/Version/llvm-project/build-tinylang
[1/4] Building CXX object tools/driver/CMakeFiles/tinylang.dir/Driver.cpp.o
FAILED: tools/driver/CMakeFiles/tinylang.dir/Driver.cpp.o
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++  -DGTEST_HAS_RTTI=0 -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/Users/xdyang/Documents/Version/llvm-project/tinylang/include -Iinclude -I/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include -fPIC -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -fdiagnostics-color -O2 -g -DNDEBUG -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.0.sdk -mmacosx-version-min=11.4    -fno-exceptions -fno-rtti -MD -MT tools/driver/CMakeFiles/tinylang.dir/Driver.cpp.o -MF tools/driver/CMakeFiles/tinylang.dir/Driver.cpp.o.d -o tools/driver/CMakeFiles/tinylang.dir/Driver.cpp.o -c /Users/xdyang/Documents/Version/llvm-project/tinylang/tools/driver/Driver.cpp
In file included from /Users/xdyang/Documents/Version/llvm-project/tinylang/tools/driver/Driver.cpp:1:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/InitLLVM.h:12:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/ADT/Optional.h:18:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/ADT/Hashing.h:48:
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/ErrorHandling.h:71:2: error: expected expression
[[noreturn]] void report_fatal_error(const char *reason,
 ^
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/ErrorHandling.h:71:14: error: expected unqualified-id
[[noreturn]] void report_fatal_error(const char *reason,
             ^
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/ErrorHandling.h:73:2: error: expected expression
[[noreturn]] void report_fatal_error(StringRef reason,
 ^
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/ErrorHandling.h:73:14: error: expected unqualified-id
[[noreturn]] void report_fatal_error(StringRef reason,
             ^
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/ErrorHandling.h:75:2: error: expected expression
[[noreturn]] void report_fatal_error(const Twine &reason,
 ^
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/ErrorHandling.h:75:14: error: expected unqualified-id
[[noreturn]] void report_fatal_error(const Twine &reason,
             ^
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/ErrorHandling.h:114:2: error: expected expression
[[noreturn]] void report_bad_alloc_error(const char *Reason,
 ^
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/ErrorHandling.h:114:14: error: expected unqualified-id
[[noreturn]] void report_bad_alloc_error(const char *Reason,
             ^
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/ErrorHandling.h:120:2: error: expected expression
[[noreturn]] void
 ^
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/ErrorHandling.h:120:14: error: expected unqualified-id
[[noreturn]] void
             ^
In file included from /Users/xdyang/Documents/Version/llvm-project/tinylang/tools/driver/Driver.cpp:1:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/InitLLVM.h:12:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/ADT/Optional.h:18:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/ADT/Hashing.h:49:
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/SwapByteOrder.h:98:1: error: unknown type name 'constexpr'
constexpr bool IsBigEndianHost = false;
^
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/SwapByteOrder.h:152:13: error: no template named 'enable_if_t' in namespace 'std'; did you mean 'enable_if'?
inline std::enable_if_t<std::is_enum<T>::value, T> getSwappedBytes(T C) {
       ~~~~~^~~~~~~~~~~
            enable_if
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.0.sdk/usr/include/c++/v1/type_traits:541:63: note: 'enable_if' declared here
template <bool, class _Tp = void> struct _LIBCPP_TEMPLATE_VIS enable_if {};
                                                              ^
In file included from /Users/xdyang/Documents/Version/llvm-project/tinylang/tools/driver/Driver.cpp:1:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/InitLLVM.h:12:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/ADT/Optional.h:18:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/ADT/Hashing.h:49:
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/SwapByteOrder.h:154:40: error: no template named 'underlying_type_t' in namespace 'std'; did you mean 'underlying_type'?
      getSwappedBytes(static_cast<std::underlying_type_t<T>>(C)));
                                  ~~~~~^~~~~~~~~~~~~~~~~
                                       underlying_type
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.0.sdk/usr/include/c++/v1/type_traits:4112:8: note: 'underlying_type' declared here
struct underlying_type : __underlying_type_impl<_Tp, is_enum<_Tp>::value> {};
       ^
In file included from /Users/xdyang/Documents/Version/llvm-project/tinylang/tools/driver/Driver.cpp:1:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/InitLLVM.h:12:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/ADT/Optional.h:18:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/ADT/Hashing.h:49:
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/SwapByteOrder.h:154:59: error: a space is required between consecutive right angle brackets (use '> >')
      getSwappedBytes(static_cast<std::underlying_type_t<T>>(C)));
                                                          ^~
                                                          > >
In file included from /Users/xdyang/Documents/Version/llvm-project/tinylang/tools/driver/Driver.cpp:1:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/InitLLVM.h:12:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/ADT/Optional.h:18:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/ADT/Hashing.h:50:
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/type_traits.h:31:23: warning: alias declarations are a C++11 extension [-Wc++11-extensions]
  using UnderlyingT = std::remove_reference_t<T>;
                      ^
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/type_traits.h:31:28: error: no template named 'remove_reference_t' in namespace 'std'; did you mean 'remove_reference'?
  using UnderlyingT = std::remove_reference_t<T>;
                      ~~~~~^~~~~~~~~~~~~~~~~~
                           remove_reference
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.0.sdk/usr/include/c++/v1/type_traits:1298:50: note: 'remove_reference' declared here
template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_reference        {typedef _LIBCPP_NODEBUG_TYPE _Tp type;};
                                                 ^
In file included from /Users/xdyang/Documents/Version/llvm-project/tinylang/tools/driver/Driver.cpp:1:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/InitLLVM.h:12:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/ADT/Optional.h:18:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/ADT/Hashing.h:50:
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/type_traits.h:44:59: warning: alias declarations are a C++11 extension [-Wc++11-extensions]
struct add_lvalue_reference_if_not_pointer { using type = T &; };
                                                          ^
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/type_traits.h:48:13: error: no template named 'enable_if_t' in namespace 'std'; did you mean 'enable_if'?
    T, std::enable_if_t<std::is_pointer<T>::value>> {
       ~~~~~^~~~~~~~~~~
            enable_if
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.0.sdk/usr/include/c++/v1/type_traits:541:63: note: 'enable_if' declared here
template <bool, class _Tp = void> struct _LIBCPP_TEMPLATE_VIS enable_if {};
                                                              ^
In file included from /Users/xdyang/Documents/Version/llvm-project/tinylang/tools/driver/Driver.cpp:1:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/InitLLVM.h:12:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/ADT/Optional.h:18:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/ADT/Hashing.h:50:
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/type_traits.h:48:53: error: expected expression
    T, std::enable_if_t<std::is_pointer<T>::value>> {
                                                    ^
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/type_traits.h:50:2: error: expected '>'
};
 ^
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/type_traits.h:48:24: note: to match this '<'
    T, std::enable_if_t<std::is_pointer<T>::value>> {
                       ^
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/type_traits.h:50:2: error: expected a type
};
 ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
2 warnings and 20 errors generated.
[2/4] Building CXX object lib/Basic/CMakeFiles/tinylangBasic.dir/Version.cpp.o
ninja: build stopped: subcommand failed.
[2/4] Building CXX object tools/driver/CMakeFiles/tinylang.dir/Driver.cpp.o
FAILED: tools/driver/CMakeFiles/tinylang.dir/Driver.cpp.o
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++  -DGTEST_HAS_RTTI=0 -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/Users/xdyang/Documents/Version/llvm-project/tinylang/include -Iinclude -I/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include -fPIC -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -fdiagnostics-color -O2 -g -DNDEBUG -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.0.sdk -mmacosx-version-min=11.4    -fno-exceptions -fno-rtti -MD -MT tools/driver/CMakeFiles/tinylang.dir/Driver.cpp.o -MF tools/driver/CMakeFiles/tinylang.dir/Driver.cpp.o.d -o tools/driver/CMakeFiles/tinylang.dir/Driver.cpp.o -c /Users/xdyang/Documents/Version/llvm-project/tinylang/tools/driver/Driver.cpp
In file included from /Users/xdyang/Documents/Version/llvm-project/tinylang/tools/driver/Driver.cpp:1:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/InitLLVM.h:12:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/ADT/Optional.h:18:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/ADT/Hashing.h:48:
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/ErrorHandling.h:71:2: error: expected expression
[[noreturn]] void report_fatal_error(const char *reason,
 ^
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/ErrorHandling.h:71:14: error: expected unqualified-id
[[noreturn]] void report_fatal_error(const char *reason,
             ^
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/ErrorHandling.h:73:2: error: expected expression
[[noreturn]] void report_fatal_error(StringRef reason,
 ^
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/ErrorHandling.h:73:14: error: expected unqualified-id
[[noreturn]] void report_fatal_error(StringRef reason,
             ^
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/ErrorHandling.h:75:2: error: expected expression
[[noreturn]] void report_fatal_error(const Twine &reason,
 ^
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/ErrorHandling.h:75:14: error: expected unqualified-id
[[noreturn]] void report_fatal_error(const Twine &reason,
             ^
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/ErrorHandling.h:114:2: error: expected expression
[[noreturn]] void report_bad_alloc_error(const char *Reason,
 ^
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/ErrorHandling.h:114:14: error: expected unqualified-id
[[noreturn]] void report_bad_alloc_error(const char *Reason,
             ^
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/ErrorHandling.h:120:2: error: expected expression
[[noreturn]] void
 ^
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/ErrorHandling.h:120:14: error: expected unqualified-id
[[noreturn]] void
             ^
In file included from /Users/xdyang/Documents/Version/llvm-project/tinylang/tools/driver/Driver.cpp:1:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/InitLLVM.h:12:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/ADT/Optional.h:18:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/ADT/Hashing.h:49:
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/SwapByteOrder.h:98:1: error: unknown type name 'constexpr'
constexpr bool IsBigEndianHost = false;
^
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/SwapByteOrder.h:152:13: error: no template named 'enable_if_t' in namespace 'std'; did you mean 'enable_if'?
inline std::enable_if_t<std::is_enum<T>::value, T> getSwappedBytes(T C) {
       ~~~~~^~~~~~~~~~~
            enable_if
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.0.sdk/usr/include/c++/v1/type_traits:541:63: note: 'enable_if' declared here
template <bool, class _Tp = void> struct _LIBCPP_TEMPLATE_VIS enable_if {};
                                                              ^
In file included from /Users/xdyang/Documents/Version/llvm-project/tinylang/tools/driver/Driver.cpp:1:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/InitLLVM.h:12:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/ADT/Optional.h:18:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/ADT/Hashing.h:49:
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/SwapByteOrder.h:154:40: error: no template named 'underlying_type_t' in namespace 'std'; did you mean 'underlying_type'?
      getSwappedBytes(static_cast<std::underlying_type_t<T>>(C)));
                                  ~~~~~^~~~~~~~~~~~~~~~~
                                       underlying_type
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.0.sdk/usr/include/c++/v1/type_traits:4112:8: note: 'underlying_type' declared here
struct underlying_type : __underlying_type_impl<_Tp, is_enum<_Tp>::value> {};
       ^
In file included from /Users/xdyang/Documents/Version/llvm-project/tinylang/tools/driver/Driver.cpp:1:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/InitLLVM.h:12:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/ADT/Optional.h:18:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/ADT/Hashing.h:49:
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/SwapByteOrder.h:154:59: error: a space is required between consecutive right angle brackets (use '> >')
      getSwappedBytes(static_cast<std::underlying_type_t<T>>(C)));
                                                          ^~
                                                          > >
In file included from /Users/xdyang/Documents/Version/llvm-project/tinylang/tools/driver/Driver.cpp:1:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/InitLLVM.h:12:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/ADT/Optional.h:18:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/ADT/Hashing.h:50:
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/type_traits.h:31:23: warning: alias declarations are a C++11 extension [-Wc++11-extensions]
  using UnderlyingT = std::remove_reference_t<T>;
                      ^
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/type_traits.h:31:28: error: no template named 'remove_reference_t' in namespace 'std'; did you mean 'remove_reference'?
  using UnderlyingT = std::remove_reference_t<T>;
                      ~~~~~^~~~~~~~~~~~~~~~~~
                           remove_reference
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.0.sdk/usr/include/c++/v1/type_traits:1298:50: note: 'remove_reference' declared here
template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_reference        {typedef _LIBCPP_NODEBUG_TYPE _Tp type;};
                                                 ^
In file included from /Users/xdyang/Documents/Version/llvm-project/tinylang/tools/driver/Driver.cpp:1:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/InitLLVM.h:12:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/ADT/Optional.h:18:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/ADT/Hashing.h:50:
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/type_traits.h:44:59: warning: alias declarations are a C++11 extension [-Wc++11-extensions]
struct add_lvalue_reference_if_not_pointer { using type = T &; };
                                                          ^
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/type_traits.h:48:13: error: no template named 'enable_if_t' in namespace 'std'; did you mean 'enable_if'?
    T, std::enable_if_t<std::is_pointer<T>::value>> {
       ~~~~~^~~~~~~~~~~
            enable_if
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.0.sdk/usr/include/c++/v1/type_traits:541:63: note: 'enable_if' declared here
template <bool, class _Tp = void> struct _LIBCPP_TEMPLATE_VIS enable_if {};
                                                              ^
In file included from /Users/xdyang/Documents/Version/llvm-project/tinylang/tools/driver/Driver.cpp:1:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/InitLLVM.h:12:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/ADT/Optional.h:18:
In file included from /Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/ADT/Hashing.h:50:
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/type_traits.h:48:53: error: expected expression
    T, std::enable_if_t<std::is_pointer<T>::value>> {
                                                    ^
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/type_traits.h:50:2: error: expected '>'
};
 ^
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/type_traits.h:48:24: note: to match this '<'
    T, std::enable_if_t<std::is_pointer<T>::value>> {
                       ^
/Users/xdyang/Documents/Version/llvm-project/build/llvm-core-libraries-output/include/llvm/Support/type_traits.h:50:2: error: expected a type
};
 ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
2 warnings and 20 errors generated.
ninja: build stopped: subcommand failed.

[sherrytonger]

Add "set(CMAKE_CXX_STANDARD 17)" to the CMakeLists, problem solved.

[redstar]

Add "set(CMAKE_CXX_STANDARD 17)" to the CMakeLists, problem solved.

Interesting. The LLVM sources are not yet require C++17. This looks like a problem with compiler detection in the core libraries. (The error comes from include/llvm/Support/ErrorHandling.h.)