Build: nanobind error

[kiefernforst]

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

[mrgreywater]

Hi, I assume you're trying to create a python binding for earcut.hpp using nanobind? You're probably better off asking in the nanobind community how to create those bindings. If you'd like us to help anyway, please provide the code you're trying to get working.