mapbox / mapbox/earcut.hpp

Build: nanobind error

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Description

When updating my nanobind build recipe from 1.0.1 to current git I'm encountering:

  • gcc 15.2.1
  • nanobind 2.13.0
  • Python 3.10
g++ -shared -Wl,-O1,--as-needed,-z,relro,-z,now -Wl,--undefined-version -Wl,-O1,--as-needed,-z,relro,-z,now -Wl,--undefined-version -Wl,-O1,--as-needed,-z,relro,-z,now -Wl,--undefined-version -march=native -mtune=native -O3 -pipe -fpermissive -fno-plt -fexceptions -Wno-unused-parameter -Wno-tautological-compare -Wno-deprecated-declarations -Wno-unknown-pragmas -Wno-error=incompatible-pointer-types -fPIC -Wno-implicit-function-declaration -Wno-incompatible-pointer-type build/temp.linux-x86_64-cpython-310/src/main.o -L/usr/lib -o build/lib.linux-x86_64-cpython-310/mapbox_earcut.cpython-310-x86_64-linux-gnu.so
/usr/bin/ld: build/temp.linux-x86_64-cpython-310/src/main.o: in function `nanobind__core_exec(_object*)':
main.cpp:(.text+0x436): undefined reference to `nanobind::detail::nb_module_exec(char const*, _object*)'
/usr/bin/ld: main.cpp:(.text+0x469): undefined reference to `nanobind::detail::setattr(_object*, char const*, _object*)'
/usr/bin/ld: main.cpp:(.text+0x522): undefined reference to `nanobind::detail::setattr(_object*, char const*, _object*)'
/usr/bin/ld: main.cpp:(.text+0x580): undefined reference to `nanobind::detail::nb_func_new(nanobind::detail::func_data_prelim_base const*)'
/usr/bin/ld: main.cpp:(.text+0x5ca): undefined reference to `nanobind::detail::nb_func_new(nanobind::detail::func_data_prelim_base const*)'
/usr/bin/ld: main.cpp:(.text+0x614): undefined reference to `nanobind::detail::nb_func_new(nanobind::detail::func_data_prelim_base const*)'
/usr/bin/ld: main.cpp:(.text+0x65e): undefined reference to `nanobind::detail::nb_func_new(nanobind::detail::func_data_prelim_base const*)'
/usr/bin/ld: main.cpp:(.text+0x6ce): undefined reference to `nanobind::detail::raise_python_or_cast_error()'
/usr/bin/ld: main.cpp:(.text+0x6e2): undefined reference to `nanobind::detail::raise_python_or_cast_error()'
/usr/bin/ld: build/temp.linux-x86_64-cpython-310/src/main.o: in function `nanobind__core_exec(_object*) [clone .cold]':
main.cpp:(.text.unlikely+0xce): undefined reference to `nanobind::python_error::restore()'
/usr/bin/ld: main.cpp:(.text.unlikely+0xe6): undefined reference to `nanobind::chain_error(nanobind::handle, char const*, ...)'
/usr/bin/ld: build/temp.linux-x86_64-cpython-310/src/main.o: in function `nanobind::detail::func_create<false, true, nanobind::detail::ndarray_object<unsigned int, nanobind::numpy, nanobind::detail::shape<-1l> > (*&)(nanobind::ndarray<long, nanobind::detail::shape<-1l, 2l>, nanobind::device::cpu> const&, nanobind::ndarray<unsigned int, nanobind::detail::shape<-1l>, nanobind::device::cpu> const&), nanobind::detail::ndarray_object<unsigned int, nanobind::numpy, nanobind::detail::shape<-1l> >, nanobind::ndarray<long, nanobind::detail::shape<-1l, 2l>, nanobind::device::cpu> const&, nanobind::ndarray<unsigned int, nanobind::detail::shape<-1l>, nanobind::device::cpu> const&, 0ul, 1ul, nanobind::scope, nanobind::name>(nanobind::detail::ndarray_object<unsigned int, nanobind::numpy, nanobind::detail::shape<-1l> > (*&)(nanobind::ndarray<long, nanobind::detail::shape<-1l, 2l>, nanobind::device::cpu> const&, nanobind::ndarray<unsigned int, nanobind::detail::shape<-1l>, nanobind::device::cpu> const&), nanobind::detail::ndarray_object<unsigned int, nanobind::numpy, nanobind::detail::shape<-1l> > (*)(nanobind::ndarray<long, nanobind::detail::shape<-1l, 2l>, nanobind::device::cpu> const&, nanobind::ndarray<unsigned int, nanobind::detail::shape<-1l>, nanobind::device::cpu> const&), std::integer_sequence<unsigned long, 0ul, 1ul>, nanobind::scope const&, nanobind::name const&)::{lambda(void*, _object**, unsigned char*, nanobind::rv_policy, nanobind::detail::cleanup_list*)#1}::_FUN(void*, _object**, unsigned char*, nanobind::rv_policy, nanobind::detail::cleanup_list*)':
main.cpp:(.text._ZZN8nanobind6detail11func_createILb0ELb1ERPFNS0_14ndarray_objectIJjNS_5numpyENS0_5shapeIJLln1EEEEEEERKNS_7ndarrayIJlNS4_IJLln1ELl2EEEENS_6device3cpuEEEERKNS7_IJjS5_SA_EEEES6_JSD_SG_EJLm0ELm1EEJNS_5scopeENS_4nameEEEEP7_objectOT1_PFT2_DpT3_ESt16integer_sequenceImJXspT4_EEEDpRKT5_ENUlPvPSN_PhNS_9rv_policyEPNS0_12cleanup_listEE_4_FUNES11_S12_S13_S14_S16_[_ZZN8nanobind6detail11func_createILb0ELb1ERPFNS0_14ndarray_objectIJjNS_5numpyENS0_5shapeIJLln1EEEEEEERKNS_7ndarrayIJlNS4_IJLln1ELl2EEEENS_6device3cpuEEEERKNS7_IJjS5_SA_EEEES6_JSD_SG_EJLm0ELm1EEJNS_5scopeENS_4nameEEEEP7_objectOT1_PFT2_DpT3_ESt16integer_sequenceImJXspT4_EEEDpRKT5_ENUlPvPSN_PhNS_9rv_policyEPNS0_12cleanup_listEE_4_FUNES11_S12_S13_S14_S16_]+0xd4): undefined reference to `nanobind::detail::ndarray_import(_object*, nanobind::detail::ndarray_config const*, bool, nanobind::detail::cleanup_list*)'

Before I've had been using nanobind 2.7

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Research direction

Start with the build command and linker errors for src/main.o, comparing the nanobind 2.7 and 2.13 configurations used with Python 3.10. Check how the extension is linked against nanobind and confirm that the build completes without the reported undefined references.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp, python
Domain
build-system
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Quiet
Clarity
Needs clarification
Newbie friendliness
35/100

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