runtimes-build fails with many "undefined symbols"

[liam-clink]

Building release 15.0.6 from the tar file, and during the stage of building the runtimes, failure occurs due to many undefined symbols.
Building with llvm-15.0.3, build command

cmake -S ../llvm -B . -G Ninja -DCMAKE_BUILD_TYPE=Release -DLLVM_TARGETS_TO_BUILD=X86 -DLLVM_ENABLE_PROJECTS="bolt;llvm;clang;lld;lldb;clang-tools-extra;cross-project-tests;libclc;polly;pstl" -DLLVM_ENABLE_RUNTIMES="openmp;libcxx;libcxxabi;libunwind;compiler-rt" -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ -DLIBCXX_USE_COMPILER_RT=YES -DLLVM_USE_LINKER=lld -DLIBCXXABI_USE_LLVM_UNWINDER=YES -DLLVM_INSTALL_UTILS=ON -DCMAKE_INSTALL_PREFIX=$HOME/llvm15_temp -DLLDB_ENABLE_PYTHON=TRUE -DPython3_EXECUTABLE=`which python3` -DLLVM_PARALLEL_LINK_JOBS=1 -DLLVM_ENABLE_LIBCXX=ON

Linking CXX shared library /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libomptarget.rtl.x86_64.so.15
FAILED: /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libomptarget.rtl.x86_64.so.15 
: && /home/liam/Downloads/llvm-project-15.0.6.src/build/./bin/clang++ --target=x86_64-unknown-linux-gnu -fPIC -fPIC -fno-semantic-interposition -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 -Wno-comment -Wstring-conversion -Wmisleading-indentation -fdiagnostics-color -ffunction-sections -fdata-sections -Wall -Wcast-qual -Wformat-pedantic -Wimplicit-fallthrough -Wsign-compare -Wno-extra -Wno-pedantic -std=c++14 -O3 -DNDEBUG  -Wl,-z,defs -Wl,-z,nodelete -fuse-ld=lld -Wl,--color-diagnostics   -Wl,--gc-sections -shared -Wl,-soname,libomptarget.rtl.x86_64.so.15 -o /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libomptarget.rtl.x86_64.so.15 openmp/libomptarget/plugins/common/elf_common/CMakeFiles/elf_common.dir/elf_common.cpp.o openmp/libomptarget/plugins/x86_64/CMakeFiles/omptarget.rtl.x86_64.dir/home/liam/Downloads/llvm-project-15.0.6.src/openmp/libomptarget/plugins/generic-elf-64bit/src/rtl.cpp.o  -Wl,-rpath,"\$ORIGIN:/home/liam/Downloads/llvm-project-15.0.6.src/build/runtimes/runtimes-bins/openmp/libomptarget/plugins/x86_64/..:"  /usr/lib/x86_64-linux-gnu/libffi.so  /usr/lib/x86_64-linux-gnu/libelf.so  -ldl  -Wl,--version-script=/home/liam/Downloads/llvm-project-15.0.6.src/openmp/libomptarget/plugins/x86_64/../exports  /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMObject.a  /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMBitReader.a  /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMCore.a  /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMRemarks.a  /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMBitstreamReader.a  /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMMCParser.a  /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMMC.a  /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMDebugInfoCodeView.a  /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMTextAPI.a  /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMBinaryFormat.a  /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMSupport.a  -lrt  -lm  /usr/lib/x86_64-linux-gnu/libz.so  /usr/lib/x86_64-linux-gnu/libtinfo.so  /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMDemangle.a  -ldl && :
ld.lld: error: undefined symbol: std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::assign(char const*)
>>> referenced by ELFObjectFile.cpp
>>>               ELFObjectFile.cpp.o:(llvm::object::ELFObjectFileBase::setARMSubArch(llvm::Triple&) const) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMObject.a
>>> referenced by ARMAttributeParser.cpp
>>>               ARMAttributeParser.cpp.o:(llvm::ARMAttributeParser::ABI_align_needed(llvm::ARMBuildAttrs::AttrType)) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMSupport.a
>>> referenced by ARMAttributeParser.cpp
>>>               ARMAttributeParser.cpp.o:(llvm::ARMAttributeParser::ABI_align_preserved(llvm::ARMBuildAttrs::AttrType)) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMSupport.a

ld.lld: error: undefined symbol: std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::append(char const*)
>>> referenced by ELFObjectFile.cpp
>>>               ELFObjectFile.cpp.o:(llvm::object::ELFObjectFileBase::setARMSubArch(llvm::Triple&) const) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMObject.a
>>> referenced by ELFObjectFile.cpp
>>>               ELFObjectFile.cpp.o:(llvm::object::ELFObjectFileBase::setARMSubArch(llvm::Triple&) const) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMObject.a
>>> referenced by ELFObjectFile.cpp
>>>               ELFObjectFile.cpp.o:(llvm::Expected<llvm::ArrayRef<llvm::object::Elf_Sym_Impl<llvm::object::ELFType<(llvm::support::endianness)1, false>>>> llvm::object::ELFFile<llvm::object::ELFType<(llvm::support::endianness)1, false>>::getSectionContentsAsArray<llvm::object::Elf_Sym_Impl<llvm::object::ELFType<(llvm::support::endianness)1, false>>>(llvm::object::Elf_Shdr_Impl<llvm::object::ELFType<(llvm::support::endianness)1, false>> const&) const) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMObject.a
>>> referenced 97 more times

ld.lld: error: undefined symbol: std::__1::error_code::message() const
>>> referenced by ELFObjectFile.cpp
>>>               ELFObjectFile.cpp.o:(llvm::object::ELFObjectFile<llvm::object::ELFType<(llvm::support::endianness)1, false>>::section_rel_end(llvm::object::DataRefImpl) const) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMObject.a
>>> referenced by ELFObjectFile.cpp
>>>               ELFObjectFile.cpp.o:(llvm::object::ELFObjectFile<llvm::object::ELFType<(llvm::support::endianness)1, false>>::getRelocationOffset(llvm::object::DataRefImpl) const) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMObject.a
>>> referenced by ELFObjectFile.cpp
>>>               ELFObjectFile.cpp.o:(llvm::object::ELFObjectFile<llvm::object::ELFType<(llvm::support::endianness)1, false>>::getRelocationSymbol(llvm::object::DataRefImpl) const) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMObject.a
>>> referenced 29 more times

ld.lld: error: undefined symbol: std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::insert(unsigned long, char const*)
>>> referenced by ELFObjectFile.cpp
>>>               ELFObjectFile.cpp.o:(llvm::Expected<llvm::ArrayRef<llvm::object::Elf_Sym_Impl<llvm::object::ELFType<(llvm::support::endianness)1, false>>>> llvm::object::ELFFile<llvm::object::ELFType<(llvm::support::endianness)1, false>>::getSectionContentsAsArray<llvm::object::Elf_Sym_Impl<llvm::object::ELFType<(llvm::support::endianness)1, false>>>(llvm::object::Elf_Shdr_Impl<llvm::object::ELFType<(llvm::support::endianness)1, false>> const&) const) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMObject.a
>>> referenced by ELFObjectFile.cpp
>>>               ELFObjectFile.cpp.o:(llvm::Expected<llvm::ArrayRef<llvm::object::Elf_Sym_Impl<llvm::object::ELFType<(llvm::support::endianness)1, false>>>> llvm::object::ELFFile<llvm::object::ELFType<(llvm::support::endianness)1, false>>::getSectionContentsAsArray<llvm::object::Elf_Sym_Impl<llvm::object::ELFType<(llvm::support::endianness)1, false>>>(llvm::object::Elf_Shdr_Impl<llvm::object::ELFType<(llvm::support::endianness)1, false>> const&) const) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMObject.a
>>> referenced by ELFObjectFile.cpp
>>>               ELFObjectFile.cpp.o:(llvm::Expected<llvm::ArrayRef<llvm::object::Elf_Sym_Impl<llvm::object::ELFType<(llvm::support::endianness)1, false>>>> llvm::object::ELFFile<llvm::object::ELFType<(llvm::support::endianness)1, false>>::getSectionContentsAsArray<llvm::object::Elf_Sym_Impl<llvm::object::ELFType<(llvm::support::endianness)1, false>>>(llvm::object::Elf_Shdr_Impl<llvm::object::ELFType<(llvm::support::endianness)1, false>> const&) const) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMObject.a
>>> referenced 102 more times

ld.lld: error: undefined symbol: std::__1::to_string(long)
>>> referenced by ELFObjectFile.cpp
>>>               ELFObjectFile.cpp.o:(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> llvm::object::getSecIndexForError<llvm::object::ELFType<(llvm::support::endianness)1, false>>(llvm::object::ELFFile<llvm::object::ELFType<(llvm::support::endianness)1, false>> const&, llvm::object::ELFType<(llvm::support::endianness)1, false>::Shdr const&)) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMObject.a
>>> referenced by ELFObjectFile.cpp
>>>               ELFObjectFile.cpp.o:(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> llvm::object::getSecIndexForError<llvm::object::ELFType<(llvm::support::endianness)0, false>>(llvm::object::ELFFile<llvm::object::ELFType<(llvm::support::endianness)0, false>> const&, llvm::object::ELFType<(llvm::support::endianness)0, false>::Shdr const&)) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMObject.a
>>> referenced by ELFObjectFile.cpp
>>>               ELFObjectFile.cpp.o:(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> llvm::object::getSecIndexForError<llvm::object::ELFType<(llvm::support::endianness)1, true>>(llvm::object::ELFFile<llvm::object::ELFType<(llvm::support::endianness)1, true>> const&, llvm::object::ELFType<(llvm::support::endianness)1, true>::Shdr const&)) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMObject.a
>>> referenced 1 more times

ld.lld: error: undefined symbol: std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::reserve(unsigned long)
>>> referenced by ELFObjectFile.cpp
>>>               ELFObjectFile.cpp.o:(llvm::toString(llvm::Error)) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMObject.a
>>> referenced by raw_ostream.cpp
>>>               raw_ostream.cpp.o:(llvm::raw_string_ostream::reserveExtraSpace(unsigned long)) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMSupport.a

ld.lld: error: undefined symbol: std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::append(char const*, unsigned long)
>>> referenced by ELFObjectFile.cpp
>>>               ELFObjectFile.cpp.o:(llvm::toString(llvm::Error)) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMObject.a
>>> referenced by ELFObjectFile.cpp
>>>               ELFObjectFile.cpp.o:(llvm::toString(llvm::Error)) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMObject.a
>>> referenced by ELFObjectFile.cpp
>>>               ELFObjectFile.cpp.o:(llvm::toString(llvm::Error)) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMObject.a
>>> referenced 6 more times

ld.lld: error: undefined symbol: std::__1::error_category::~error_category()
>>> referenced by Error.cpp
>>>               Error.cpp.o:(llvm::object::object_category()) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMObject.a
>>> referenced by Error.cpp
>>>               Error.cpp.o:((anonymous namespace)::_object_error_category::~_object_error_category()) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMObject.a
>>> referenced by Error.cpp
>>>               Error.cpp.o:(vtable for (anonymous namespace)::_object_error_category) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMObject.a
>>> referenced 4 more times

ld.lld: error: undefined symbol: std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>::basic_string(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const&)
>>> referenced by Error.cpp
>>>               Error.cpp.o:(llvm::ErrorInfoBase::message() const) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMObject.a
>>> referenced by BitcodeReader.cpp
>>>               BitcodeReader.cpp.o:(void std::__1::vector<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>, std::__1::allocator<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>>>::__push_back_slow_path<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const&>(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const&)) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMBitReader.a
>>> referenced by PrintPasses.cpp
>>>               PrintPasses.cpp.o:(llvm::cl::list<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>, bool, llvm::cl::parser<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>>>::handleOccurrence(unsigned int, llvm::StringRef, llvm::StringRef)) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMCore.a
>>> referenced 1 more times

ld.lld: error: undefined symbol: std::__1::error_category::default_error_condition(int) const
>>> referenced by Error.cpp
>>>               Error.cpp.o:(vtable for (anonymous namespace)::_object_error_category) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMObject.a
>>> referenced by Error.cpp
>>>               Error.cpp.o:(vtable for (anonymous namespace)::ErrorErrorCategory) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMSupport.a

ld.lld: error: undefined symbol: std::__1::error_category::equivalent(int, std::__1::error_condition const&) const
>>> referenced by Error.cpp
>>>               Error.cpp.o:(vtable for (anonymous namespace)::_object_error_category) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMObject.a
>>> referenced by Error.cpp
>>>               Error.cpp.o:(vtable for (anonymous namespace)::ErrorErrorCategory) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMSupport.a

ld.lld: error: undefined symbol: std::__1::error_category::equivalent(std::__1::error_code const&, int) const
>>> referenced by Error.cpp
>>>               Error.cpp.o:(vtable for (anonymous namespace)::_object_error_category) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMObject.a
>>> referenced by Error.cpp
>>>               Error.cpp.o:(vtable for (anonymous namespace)::ErrorErrorCategory) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMSupport.a

ld.lld: error: undefined symbol: std::__1::__shared_weak_count::__release_weak()
>>> referenced by DiagnosticHandler.cpp
>>>               DiagnosticHandler.cpp.o:((anonymous namespace)::PassRemarksOpt::~PassRemarksOpt()) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMCore.a
>>> referenced by DiagnosticHandler.cpp
>>>               DiagnosticHandler.cpp.o:(llvm::cl::opt<(anonymous namespace)::PassRemarksOpt, true, llvm::cl::parser<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>>>::handleOccurrence(unsigned int, llvm::StringRef, llvm::StringRef)) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMCore.a
>>> referenced by DiagnosticHandler.cpp
>>>               DiagnosticHandler.cpp.o:(llvm::cl::opt<(anonymous namespace)::PassRemarksOpt, true, llvm::cl::parser<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>>>::setDefault()) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMCore.a

ld.lld: error: undefined symbol: std::__1::__shared_weak_count::~__shared_weak_count()
>>> referenced by DiagnosticHandler.cpp
>>>               DiagnosticHandler.cpp.o:(std::__1::__shared_ptr_emplace<llvm::Regex, std::__1::allocator<llvm::Regex>>::~__shared_ptr_emplace()) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMCore.a
>>> referenced by DiagnosticHandler.cpp
>>>               DiagnosticHandler.cpp.o:(std::__1::__shared_ptr_emplace<llvm::Regex, std::__1::allocator<llvm::Regex>>::~__shared_ptr_emplace()) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMCore.a

ld.lld: error: undefined symbol: std::__1::__shared_weak_count::__get_deleter(std::type_info const&) const
>>> referenced by DiagnosticHandler.cpp
>>>               DiagnosticHandler.cpp.o:(vtable for std::__1::__shared_ptr_emplace<llvm::Regex, std::__1::allocator<llvm::Regex>>) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMCore.a

ld.lld: error: undefined symbol: std::__1::generic_category()
>>> referenced by DataExtractor.cpp
>>>               DataExtractor.cpp.o:(llvm::DataExtractor::prepareRead(unsigned long, unsigned long, llvm::Error*) const) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMSupport.a
>>> referenced by DataExtractor.cpp
>>>               DataExtractor.cpp.o:(llvm::DataExtractor::getCStrRef(unsigned long*, llvm::Error*) const) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMSupport.a
>>> referenced by DataExtractor.cpp
>>>               DataExtractor.cpp.o:(llvm::DataExtractor::getULEB128(unsigned long*, llvm::Error*) const) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMSupport.a
>>> referenced 14 more times

ld.lld: error: undefined symbol: std::__1::__next_prime(unsigned long)
>>> referenced by ELFAttributeParser.cpp
>>>               ELFAttributeParser.cpp.o:(std::__1::pair<std::__1::__hash_iterator<std::__1::__hash_node<std::__1::__hash_value_type<unsigned int, unsigned int>, void*>*>, bool> std::__1::__hash_table<std::__1::__hash_value_type<unsigned int, unsigned int>, std::__1::__unordered_map_hasher<unsigned int, std::__1::__hash_value_type<unsigned int, unsigned int>, std::__1::hash<unsigned int>, std::__1::equal_to<unsigned int>, true>, std::__1::__unordered_map_equal<unsigned int, std::__1::__hash_value_type<unsigned int, unsigned int>, std::__1::equal_to<unsigned int>, std::__1::hash<unsigned int>, true>, std::__1::allocator<std::__1::__hash_value_type<unsigned int, unsigned int>>>::__emplace_unique_key_args<unsigned int, std::__1::pair<unsigned int, unsigned long>>(unsigned int const&, std::__1::pair<unsigned int, unsigned long>&&)) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMSupport.a
>>> referenced by ELFAttributeParser.cpp
>>>               ELFAttributeParser.cpp.o:(std::__1::pair<std::__1::__hash_iterator<std::__1::__hash_node<std::__1::__hash_value_type<unsigned int, unsigned int>, void*>*>, bool> std::__1::__hash_table<std::__1::__hash_value_type<unsigned int, unsigned int>, std::__1::__unordered_map_hasher<unsigned int, std::__1::__hash_value_type<unsigned int, unsigned int>, std::__1::hash<unsigned int>, std::__1::equal_to<unsigned int>, true>, std::__1::__unordered_map_equal<unsigned int, std::__1::__hash_value_type<unsigned int, unsigned int>, std::__1::equal_to<unsigned int>, std::__1::hash<unsigned int>, true>, std::__1::allocator<std::__1::__hash_value_type<unsigned int, unsigned int>>>::__emplace_unique_key_args<unsigned int, std::__1::pair<unsigned int, unsigned long>>(unsigned int const&, std::__1::pair<unsigned int, unsigned long>&&)) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMSupport.a
>>> referenced by ELFAttributeParser.cpp
>>>               ELFAttributeParser.cpp.o:(std::__1::pair<std::__1::__hash_iterator<std::__1::__hash_node<std::__1::__hash_value_type<unsigned int, llvm::StringRef>, void*>*>, bool> std::__1::__hash_table<std::__1::__hash_value_type<unsigned int, llvm::StringRef>, std::__1::__unordered_map_hasher<unsigned int, std::__1::__hash_value_type<unsigned int, llvm::StringRef>, std::__1::hash<unsigned int>, std::__1::equal_to<unsigned int>, true>, std::__1::__unordered_map_equal<unsigned int, std::__1::__hash_value_type<unsigned int, llvm::StringRef>, std::__1::equal_to<unsigned int>, std::__1::hash<unsigned int>, true>, std::__1::allocator<std::__1::__hash_value_type<unsigned int, llvm::StringRef>>>::__emplace_unique_key_args<unsigned int, std::__1::pair<unsigned int, llvm::StringRef>>(unsigned int const&, std::__1::pair<unsigned int, llvm::StringRef>&&)) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMSupport.a
>>> referenced 3 more times

ld.lld: error: undefined symbol: std::__1::system_category()
>>> referenced by Error.cpp
>>>               Error.cpp.o:(llvm::errorToErrorCode(llvm::Error)) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMSupport.a
>>> referenced by raw_ostream.cpp
>>>               raw_ostream.cpp.o:(llvm::raw_fd_ostream::raw_fd_ostream(llvm::StringRef, std::__1::error_code&, llvm::sys::fs::OpenFlags)) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMSupport.a
>>> referenced by raw_ostream.cpp
>>>               raw_ostream.cpp.o:(llvm::raw_fd_ostream::raw_fd_ostream(int, bool, bool, llvm::raw_ostream::OStreamKind)) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMSupport.a
>>> referenced 4 more times

ld.lld: error: undefined symbol: std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> std::__1::operator+<char, std::__1::char_traits<char>, std::__1::allocator<char>>(char const*, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const&)
>>> referenced by Error.cpp
>>>               Error.cpp.o:(llvm::StringError::log(llvm::raw_ostream&) const) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMSupport.a

ld.lld: error: undefined symbol: std::__1::mutex::lock()
>>> referenced by ErrorHandling.cpp
>>>               ErrorHandling.cpp.o:(llvm::report_fatal_error(llvm::Twine const&, bool)) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMSupport.a
>>> referenced by ErrorHandling.cpp
>>>               ErrorHandling.cpp.o:(llvm::report_bad_alloc_error(char const*, bool)) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMSupport.a
>>> referenced by Process.cpp
>>>               Process.cpp.o:(llvm::sys::Process::FileDescriptorHasColors(int)) in archive /home/liam/Downloads/llvm-project-15.0.6.src/build/lib/libLLVMSupport.a

ld.lld: error: too many errors emitted, stopping now (use --error-limit=0 to see all errors)

FAILED: runtimes/runtimes-stamps/runtimes-build /home/liam/Downloads/llvm-project-15.0.6.src/build/runtimes/runtimes-stamps/runtimes-build 
cd /home/liam/Downloads/llvm-project-15.0.6.src/build/runtimes/runtimes-bins && /usr/bin/cmake --build .
ninja: build stopped: subcommand failed.

[liam-clink]

This does not happen when the -DLLVM_ENABLE_LIBCXX=ON option is omitted. Shouldn't llvm work better using it's own libc++ over libstdc++?

[layerkugou]

good thankyou

[bernardassan]

This seems to happen when parts of the project are built with different compilers. I just downloaded llvm-19.1.1, when building Zig and linking to the released llvm-19.1.1 it gives me similar errors. Using ldd on some of the objects, It seems they were built with gcc and linked to libstdc++ and the gcc runtime libgcc_s. But when building Zig it uses libc++ which leads to similar issues with symbol resolution.