Problem with absl

[PawBlo]

I have problem to compile & run alpha_zero_torch_example.cc. I build open_spiel from source. When I try to build
clang++ -I${HOME}/open_spiel -I${HOME}/open_spiel/open_spiel/abseil-cpp -std=c++17 -o az alpha_zero_torch_example.cc -L${HOME}/open_spiel/build -lopen_spiel
alpha_zero_torch_example.cc i get this error:

/usr/bin/ld: /tmp/alpha_zero_torch_example-8f9c6c.o: in function `main':
alpha_zero_torch_example.cc:(.text+0xb5): undefined reference to `absl::lts_20230125::ParseCommandLine(int, char**)'
/usr/bin/ld: alpha_zero_torch_example.cc:(.text+0x95d): undefined reference to `open_spiel::algorithms::torch_az::AlphaZero(open_spiel::algorithms::torch_az::AlphaZeroConfig, open_spiel::StopToken*, bool)'
/usr/bin/ld: /tmp/alpha_zero_torch_example-8f9c6c.o: in function `absl::lts_20230125::flags_internal::FlagRegistrar<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, true>::FlagRegistrar(absl::lts_20230125::flags_internal::Flag<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >&, char const*)':
alpha_zero_torch_example.cc:(.text._ZN4absl12lts_2023012514flags_internal13FlagRegistrarINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELb1EEC2ERNS1_4FlagIS8_EEPKc[_ZN4absl12lts_2023012514flags_internal13FlagRegistrarINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELb1EEC2ERNS1_4FlagIS8_EEPKc]+0x27): undefined reference to `absl::lts_20230125::flags_internal::RegisterCommandLineFlag(absl::lts_20230125::CommandLineFlag&, char const*)'
/usr/bin/ld: /tmp/alpha_zero_torch_example-8f9c6c.o: in function `absl::lts_20230125::flags_internal::FlagRegistrar<int, true>::FlagRegistrar(absl::lts_20230125::flags_internal::Flag<int>&, char const*)':
alpha_zero_torch_example.cc:(.text._ZN4absl12lts_2023012514flags_internal13FlagRegistrarIiLb1EEC2ERNS1_4FlagIiEEPKc[_ZN4absl12lts_2023012514flags_internal13FlagRegistrarIiLb1EEC2ERNS1_4FlagIiEEPKc]+0x27): undefined reference to `absl::lts_20230125::flags_internal::RegisterCommandLineFlag(absl::lts_20230125::CommandLineFlag&, char const*)'
/usr/bin/ld: /tmp/alpha_zero_torch_example-8f9c6c.o: in function `absl::lts_20230125::flags_internal::FlagRegistrar<double, true>::FlagRegistrar(absl::lts_20230125::flags_internal::Flag<double>&, char const*)':
alpha_zero_torch_example.cc:(.text._ZN4absl12lts_2023012514flags_internal13FlagRegistrarIdLb1EEC2ERNS1_4FlagIdEEPKc[_ZN4absl12lts_2023012514flags_internal13FlagRegistrarIdLb1EEC2ERNS1_4FlagIdEEPKc]+0x27): undefined reference to `absl::lts_20230125::flags_internal::RegisterCommandLineFlag(absl::lts_20230125::CommandLineFlag&, char const*)'
/usr/bin/ld: /tmp/alpha_zero_torch_example-8f9c6c.o: in function `absl::lts_20230125::flags_internal::FlagRegistrar<bool, true>::FlagRegistrar(absl::lts_20230125::flags_internal::Flag<bool>&, char const*)':
alpha_zero_torch_example.cc:(.text._ZN4absl12lts_2023012514flags_internal13FlagRegistrarIbLb1EEC2ERNS1_4FlagIbEEPKc[_ZN4absl12lts_2023012514flags_internal13FlagRegistrarIbLb1EEC2ERNS1_4FlagIbEEPKc]+0x27): undefined reference to `absl::lts_20230125::flags_internal::RegisterCommandLineFlag(absl::lts_20230125::CommandLineFlag&, char const*)'
/usr/bin/ld: /tmp/alpha_zero_torch_example-8f9c6c.o: in function `bool absl::lts_20230125::flags_internal::InvokeParseFlag<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >(std::basic_string_view<char, std::char_traits<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*)':
alpha_zero_torch_example.cc:(.text._ZN4absl12lts_2023012514flags_internal15InvokeParseFlagINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEEbSt17basic_string_viewIcS6_EPT_PS8_[_ZN4absl12lts_2023012514flags_internal15InvokeParseFlagINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEEbSt17basic_string_viewIcS6_EPT_PS8_]+0x39): undefined reference to `absl::lts_20230125::flags_internal::AbslParseFlag(std::basic_string_view<char, std::char_traits<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*)'
/usr/bin/ld: /tmp/alpha_zero_torch_example-8f9c6c.o: in function `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > absl::lts_20230125::flags_internal::Unparse<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)':
alpha_zero_torch_example.cc:(.text._ZN4absl12lts_2023012514flags_internal7UnparseINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEES8_RKT_[_ZN4absl12lts_2023012514flags_internal7UnparseINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEES8_RKT_]+0x39): undefined reference to `absl::lts_20230125::flags_internal::AbslUnparseFlag[abi:cxx11](std::basic_string_view<char, std::char_traits<char> >)'
/usr/bin/ld: /tmp/alpha_zero_torch_example-8f9c6c.o: in function `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > absl::lts_20230125::UnparseFlag<int>(int const&)':
alpha_zero_torch_example.cc:(.text._ZN4absl12lts_2023012511UnparseFlagIiEENSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERKT_[_ZN4absl12lts_2023012511UnparseFlagIiEENSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERKT_]+0x21): undefined reference to `absl::lts_20230125::flags_internal::Unparse[abi:cxx11](int)'
/usr/bin/ld: /tmp/alpha_zero_torch_example-8f9c6c.o: in function `bool absl::lts_20230125::flags_internal::InvokeParseFlag<int>(std::basic_string_view<char, std::char_traits<char> >, int*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*)':
alpha_zero_torch_example.cc:(.text._ZN4absl12lts_2023012514flags_internal15InvokeParseFlagIiEEbSt17basic_string_viewIcSt11char_traitsIcEEPT_PNSt7__cxx1112basic_stringIcS5_SaIcEEE[_ZN4absl12lts_2023012514flags_internal15InvokeParseFlagIiEEbSt17basic_string_viewIcSt11char_traitsIcEEPT_PNSt7__cxx1112basic_stringIcS5_SaIcEEE]+0x39): undefined reference to `absl::lts_20230125::flags_internal::AbslParseFlag(std::basic_string_view<char, std::char_traits<char> >, int*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*)'
/usr/bin/ld: /tmp/alpha_zero_torch_example-8f9c6c.o: in function `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > absl::lts_20230125::UnparseFlag<double>(double const&)':
alpha_zero_torch_example.cc:(.text._ZN4absl12lts_2023012511UnparseFlagIdEENSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERKT_[_ZN4absl12lts_2023012511UnparseFlagIdEENSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERKT_]+0x23): undefined reference to `absl::lts_20230125::flags_internal::Unparse[abi:cxx11](double)'
/usr/bin/ld: /tmp/alpha_zero_torch_example-8f9c6c.o: in function `bool absl::lts_20230125::flags_internal::InvokeParseFlag<double>(std::basic_string_view<char, std::char_traits<char> >, double*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*)':
alpha_zero_torch_example.cc:(.text._ZN4absl12lts_2023012514flags_internal15InvokeParseFlagIdEEbSt17basic_string_viewIcSt11char_traitsIcEEPT_PNSt7__cxx1112basic_stringIcS5_SaIcEEE[_ZN4absl12lts_2023012514flags_internal15InvokeParseFlagIdEEbSt17basic_string_viewIcSt11char_traitsIcEEPT_PNSt7__cxx1112basic_stringIcS5_SaIcEEE]+0x39): undefined reference to `absl::lts_20230125::flags_internal::AbslParseFlag(std::basic_string_view<char, std::char_traits<char> >, double*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*)'
/usr/bin/ld: /tmp/alpha_zero_torch_example-8f9c6c.o: in function `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > absl::lts_20230125::UnparseFlag<bool>(bool const&)':
alpha_zero_torch_example.cc:(.text._ZN4absl12lts_2023012511UnparseFlagIbEENSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERKT_[_ZN4absl12lts_2023012511UnparseFlagIbEENSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERKT_]+0x26): undefined reference to `absl::lts_20230125::flags_internal::Unparse[abi:cxx11](bool)'
/usr/bin/ld: /tmp/alpha_zero_torch_example-8f9c6c.o: in function `bool absl::lts_20230125::flags_internal::InvokeParseFlag<bool>(std::basic_string_view<char, std::char_traits<char> >, bool*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*)':
alpha_zero_torch_example.cc:(.text._ZN4absl12lts_2023012514flags_internal15InvokeParseFlagIbEEbSt17basic_string_viewIcSt11char_traitsIcEEPT_PNSt7__cxx1112basic_stringIcS5_SaIcEEE[_ZN4absl12lts_2023012514flags_internal15InvokeParseFlagIbEEbSt17basic_string_viewIcSt11char_traitsIcEEPT_PNSt7__cxx1112basic_stringIcS5_SaIcEEE]+0x39): undefined reference to `absl::lts_20230125::flags_internal::AbslParseFlag(std::basic_string_view<char, std::char_traits<char> >, bool*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*)'
/usr/bin/ld: /tmp/alpha_zero_torch_example-8f9c6c.o: in function `absl::lts_20230125::flags_internal::Flag<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >::Get() const':
alpha_zero_torch_example.cc:(.text._ZNK4absl12lts_2023012514flags_internal4FlagINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEE3GetEv[_ZNK4absl12lts_2023012514flags_internal4FlagINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEE3GetEv]+0x40): undefined reference to `absl::lts_20230125::flags_internal::FlagImpl::AssertValidType(void const*, std::type_info const* (*)()) const'
/usr/bin/ld: alpha_zero_torch_example.cc:(.text._ZNK4absl12lts_2023012514flags_internal4FlagINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEE3GetEv[_ZNK4absl12lts_2023012514flags_internal4FlagINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEE3GetEv]+0x84): undefined reference to `absl::lts_20230125::flags_internal::FlagImpl::Read(void*) const'
/usr/bin/ld: /tmp/alpha_zero_torch_example-8f9c6c.o: in function `absl::lts_20230125::flags_internal::Flag<int>::Get() const':
alpha_zero_torch_example.cc:(.text._ZNK4absl12lts_2023012514flags_internal4FlagIiE3GetEv[_ZNK4absl12lts_2023012514flags_internal4FlagIiE3GetEv]+0x31): undefined reference to `absl::lts_20230125::flags_internal::FlagImpl::AssertValidType(void const*, std::type_info const* (*)()) const'
/usr/bin/ld: /tmp/alpha_zero_torch_example-8f9c6c.o: in function `void absl::lts_20230125::flags_internal::FlagImpl::Read<int, 0>(int*) const':
alpha_zero_torch_example.cc:(.text._ZNK4absl12lts_2023012514flags_internal8FlagImpl4ReadIiLi0EEEvPT_[_ZNK4absl12lts_2023012514flags_internal8FlagImpl4ReadIiLi0EEEvPT_]+0x15): undefined reference to `absl::lts_20230125::flags_internal::FlagImpl::ReadOneWord() const'
/usr/bin/ld: /tmp/alpha_zero_torch_example-8f9c6c.o: in function `absl::lts_20230125::flags_internal::Flag<bool>::Get() const':
alpha_zero_torch_example.cc:(.text._ZNK4absl12lts_2023012514flags_internal4FlagIbE3GetEv[_ZNK4absl12lts_2023012514flags_internal4FlagIbE3GetEv]+0x31): undefined reference to `absl::lts_20230125::flags_internal::FlagImpl::AssertValidType(void const*, std::type_info const* (*)()) const'
/usr/bin/ld: /tmp/alpha_zero_torch_example-8f9c6c.o: in function `absl::lts_20230125::flags_internal::FlagImpl::Read(bool*) const':
alpha_zero_torch_example.cc:(.text._ZNK4absl12lts_2023012514flags_internal8FlagImpl4ReadEPb[_ZNK4absl12lts_2023012514flags_internal8FlagImpl4ReadEPb]+0x15): undefined reference to `absl::lts_20230125::flags_internal::FlagImpl::ReadOneBool() const'
/usr/bin/ld: /tmp/alpha_zero_torch_example-8f9c6c.o: in function `absl::lts_20230125::flags_internal::Flag<double>::Get() const':
alpha_zero_torch_example.cc:(.text._ZNK4absl12lts_2023012514flags_internal4FlagIdE3GetEv[_ZNK4absl12lts_2023012514flags_internal4FlagIdE3GetEv]+0x31): undefined reference to `absl::lts_20230125::flags_internal::FlagImpl::AssertValidType(void const*, std::type_info const* (*)()) const'
/usr/bin/ld: /tmp/alpha_zero_torch_example-8f9c6c.o: in function `void absl::lts_20230125::flags_internal::FlagImpl::Read<double, 0>(double*) const':
alpha_zero_torch_example.cc:(.text._ZNK4absl12lts_2023012514flags_internal8FlagImpl4ReadIdLi0EEEvPT_[_ZNK4absl12lts_2023012514flags_internal8FlagImpl4ReadIdLi0EEEvPT_]+0x15): undefined reference to `absl::lts_20230125::flags_internal::FlagImpl::ReadOneWord() const'
/usr/bin/ld: /tmp/alpha_zero_torch_example-8f9c6c.o:(.data+0x0): undefined reference to `vtable for absl::lts_20230125::flags_internal::FlagImpl'
/usr/bin/ld: /tmp/alpha_zero_torch_example-8f9c6c.o:(.data+0x70): undefined reference to `vtable for absl::lts_20230125::flags_internal::FlagImpl'
/usr/bin/ld: /tmp/alpha_zero_torch_example-8f9c6c.o:(.data+0xe0): undefined reference to `vtable for absl::lts_20230125::flags_internal::FlagImpl'
/usr/bin/ld: /tmp/alpha_zero_torch_example-8f9c6c.o:(.data+0x150): undefined reference to `vtable for absl::lts_20230125::flags_internal::FlagImpl'
/usr/bin/ld: /tmp/alpha_zero_torch_example-8f9c6c.o:(.data+0x1c0): undefined reference to `vtable for absl::lts_20230125::flags_internal::FlagImpl'
/usr/bin/ld: /tmp/alpha_zero_torch_example-8f9c6c.o:(.data+0x218): more undefined references to `vtable for absl::lts_20230125::flags_internal::FlagImpl' follow

1. How to solve this problem?
2. Do you have any specific requirements for the library to ensure everything works properly? Like Ubuntu version, cuda version, tensorflow version, clang version, ld version?
   My env:
   open_spiel - master
   Ubuntu 22.04.4 LTS
   GNU ld (GNU Binutils for Ubuntu) 2.38
   Python 3.10.12
   Ubuntu clang version 14.0.0-1ubuntu1.1

[lanctot]

Yes, this is a known problem. There is a solution described in here: #966, but it would be good to finally fix this properly.

[lanctot]

Closing due to inactivity, please re-open if you want to follow-up.