Error compiling with `--with-lto` -- undefined reference to `vtable for strictmod::objects::StrictExceptionObject`

[Ravi Rahman]

I am trying to compile with Cinder with --with-lto but am getting the following errors:

dfg++ -pthread   -flto -fuse-linker-plugin -ffat-lto-objects -flto-partition=none -g -fprofile-generate -Xlinker -export-dynamic -o python Programs/python.o libpython3.10_static.a -lcrypt -lpthread -ldl  -lz -lutil -lm   -lm  -lrt 
/usr/bin/ld: python.lto.o: in function `std::__shared_ptr<strictmod::objects::StrictExceptionObject, (__gnu_cxx::_Lock_policy)2>::__shared_ptr<std::allocator<strictmod::objects::StrictExceptionObject>, std::shared_ptr<strictmod::objects::StrictType>, std::weak_ptr<strictmod::objects::StrictModuleObject> const&, std::shared_ptr<sequence_map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::shared_ptr<strictmod::objects::BaseStrictObject>, std::hash<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::equal_to<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >(std::_Sp_alloc_shared_tag<std::allocator<strictmod::objects::StrictExceptionObject> >, std::shared_ptr<strictmod::objects::StrictType>&&, std::weak_ptr<strictmod::objects::StrictModuleObject> const&, std::shared_ptr<sequence_map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::shared_ptr<strictmod::objects::BaseStrictObject>, std::hash<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::equal_to<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >&&) [clone .isra.0]':
/vol/./StrictModules/Objects/exception_object.h:10: undefined reference to `vtable for strictmod::objects::StrictExceptionObject'
/usr/bin/ld: python.lto.o: in function `std::shared_ptr<strictmod::objects::StrictType> strictmod::objects::makeType<strictmod::objects::StrictExceptionType, char const (&) [10], std::shared_ptr<strictmod::objects::StrictModuleObject>&, std::vector<std::shared_ptr<strictmod::objects::BaseStrictObject>, std::allocator<std::shared_ptr<strictmod::objects::BaseStrictObject> > >, std::shared_ptr<strictmod::objects::StrictType> >(char const (&) [10], std::shared_ptr<strictmod::objects::StrictModuleObject>&, std::vector<std::shared_ptr<strictmod::objects::BaseStrictObject>, std::allocator<std::shared_ptr<strictmod::objects::BaseStrictObject> > >&&, std::shared_ptr<strictmod::objects::StrictType>&&) [clone .constprop.0]':
/vol/./StrictModules/Objects/exception_object.h:26: undefined reference to `vtable for strictmod::objects::StrictExceptionType'
/usr/bin/ld: python.lto.o: in function `strictmod::objects::AttributeErrorType()':
/vol/./StrictModules/Objects/exception_object.h:26: undefined reference to `vtable for strictmod::objects::StrictExceptionType'
/usr/bin/ld: python.lto.o: in function `strictmod::objects::AssertionErrorType()':
/vol/./StrictModules/Objects/exception_object.h:26: undefined reference to `vtable for strictmod::objects::StrictExceptionType'
/usr/bin/ld: python.lto.o: in function `strictmod::objects::ValueErrorType()':
/vol/./StrictModules/Objects/exception_object.h:26: undefined reference to `vtable for strictmod::objects::StrictExceptionType'
/usr/bin/ld: python.lto.o: in function `strictmod::objects::NotImplementedErrorType()':
/vol/./StrictModules/Objects/exception_object.h:26: undefined reference to `vtable for strictmod::objects::StrictExceptionType'
/usr/bin/ld: python.lto.o:/vol/./StrictModules/Objects/exception_object.h:26: more undefined references to `vtable for strictmod::objects::StrictExceptionType' follow

I am using the python-build-env dockerimage. It appears that all of the strict modules are getting compiled, so I am confused why it is failing to link.

Steps to reproduce:

git clone https://github.com/facebookincubator/cinder
docker run -v "$PWD/cinder:/vol" -w /vol -it --rm ghcr.io/facebookincubator/cinder/python-build-env:latest bash
./configure --with-lto
make VERBOSE=1

I am able to build it without LTO. Would appreciate if you could let me know what I need to do differently. Thanks!