Manual linking against Python3_LIBRARIES needed?

[maichmueller]

Hi!
I am a little confused as to whether or not I am supposed to link against ${Python3_LIBRARIES} manually when using pybind11 or whether pybind11 should automatically link it for me.
The point is that...

Case 1:

set set(PYBIND11_FINDPYTHON TRUE) and link against pybind11::module then pybind11 finds Python:

-- Found Python: /usr/bin/python3.10 (found suitable version "3.10.12", minimum required is "3.6") found components: Interpreter Development Development.Module Development.Embed

but I get a whole host of linker errors from within pybind11 for Python API:

Linker error msgs

/usr/bin/ld: /usr/bin/ld: DWARF error: invalid or unhandled FORM value: 0x23
CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `_Py_DECREF(_object*)':
main_tests.cpp:(.text+0x190): undefined reference to `_Py_Dealloc'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `_PyObject_TypeCheck(_object*, _typeobject*)':
main_tests.cpp:(.text+0x23c): undefined reference to `PyType_IsSubtype'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `_import_array()':
main_tests.cpp:(.text+0x430): undefined reference to `PyExc_RuntimeError'
/usr/bin/ld: main_tests.cpp:(.text+0x434): undefined reference to `PyExc_RuntimeError'
/usr/bin/ld: main_tests.cpp:(.text+0x444): undefined reference to `PyImport_ImportModule'
/usr/bin/ld: main_tests.cpp:(.text+0x47c): undefined reference to `PyObject_GetAttrString'
/usr/bin/ld: main_tests.cpp:(.text+0x4a0): undefined reference to `PyExc_AttributeError'
/usr/bin/ld: main_tests.cpp:(.text+0x4a4): undefined reference to `PyExc_AttributeError'
/usr/bin/ld: main_tests.cpp:(.text+0x4b4): undefined reference to `PyErr_SetString'
/usr/bin/ld: main_tests.cpp:(.text+0x4c8): undefined reference to `PyCapsule_Type'
/usr/bin/ld: main_tests.cpp:(.text+0x4cc): undefined reference to `PyCapsule_Type'
/usr/bin/ld: main_tests.cpp:(.text+0x4f4): undefined reference to `PyErr_SetString'
/usr/bin/ld: main_tests.cpp:(.text+0x514): undefined reference to `PyCapsule_GetPointer'
/usr/bin/ld: main_tests.cpp:(.text+0x554): undefined reference to `PyErr_SetString'
/usr/bin/ld: main_tests.cpp:(.text+0x5c0): undefined reference to `PyErr_Format'
/usr/bin/ld: main_tests.cpp:(.text+0x624): undefined reference to `PyErr_Format'
/usr/bin/ld: main_tests.cpp:(.text+0x66c): undefined reference to `PyErr_SetString'
/usr/bin/ld: main_tests.cpp:(.text+0x6a0): undefined reference to `PyErr_SetString'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::gil_scoped_acquire::gil_scoped_acquire()':
main_tests.cpp:(.text._ZN8pybind1118gil_scoped_acquireC2Ev[_ZN8pybind1118gil_scoped_acquireC2Ev]+0x38): undefined reference to `PyThread_tss_get'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1118gil_scoped_acquireC2Ev[_ZN8pybind1118gil_scoped_acquireC2Ev]+0x58): undefined reference to `PyGILState_GetThisThreadState'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1118gil_scoped_acquireC2Ev[_ZN8pybind1118gil_scoped_acquireC2Ev]+0x88): undefined reference to `PyThreadState_New'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1118gil_scoped_acquireC2Ev[_ZN8pybind1118gil_scoped_acquireC2Ev]+0xcc): undefined reference to `PyThread_tss_set'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1118gil_scoped_acquireC2Ev[_ZN8pybind1118gil_scoped_acquireC2Ev]+0x10c): undefined reference to `PyEval_AcquireThread'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::error_scope::error_scope()':
main_tests.cpp:(.text._ZN8pybind1111error_scopeC2Ev[_ZN8pybind1111error_scopeC2Ev]+0x24): undefined reference to `PyErr_Fetch'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::error_scope::~error_scope()':
main_tests.cpp:(.text._ZN8pybind1111error_scopeD2Ev[_ZN8pybind1111error_scopeD2Ev]+0x20): undefined reference to `PyErr_Restore'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::gil_scoped_acquire::~gil_scoped_acquire()':
main_tests.cpp:(.text._ZN8pybind1118gil_scoped_acquireD2Ev[_ZN8pybind1118gil_scoped_acquireD2Ev]+0x30): undefined reference to `PyEval_SaveThread'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `xt::import_numpy()':
main_tests.cpp:(.text._ZN2xt12import_numpyEv[_ZN2xt12import_numpyEv]+0x1c): undefined reference to `PyErr_Print'
/usr/bin/ld: main_tests.cpp:(.text._ZN2xt12import_numpyEv[_ZN2xt12import_numpyEv]+0x20): undefined reference to `PyExc_ImportError'
/usr/bin/ld: main_tests.cpp:(.text._ZN2xt12import_numpyEv[_ZN2xt12import_numpyEv]+0x24): undefined reference to `PyExc_ImportError'
/usr/bin/ld: main_tests.cpp:(.text._ZN2xt12import_numpyEv[_ZN2xt12import_numpyEv]+0x34): undefined reference to `PyErr_SetString'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::get_internals()':
main_tests.cpp:(.text._ZN8pybind116detail13get_internalsEv[_ZN8pybind116detail13get_internalsEv]+0x88): undefined reference to `PyEval_GetBuiltins'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail13get_internalsEv[_ZN8pybind116detail13get_internalsEv]+0x330): undefined reference to `PyThreadState_Get'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail13get_internalsEv[_ZN8pybind116detail13get_internalsEv]+0x344): undefined reference to `PyThread_tss_alloc'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail13get_internalsEv[_ZN8pybind116detail13get_internalsEv]+0x380): undefined reference to `PyThread_tss_create'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail13get_internalsEv[_ZN8pybind116detail13get_internalsEv]+0x3c0): undefined reference to `PyThread_tss_set'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::pybind11_fail(char const*)':
main_tests.cpp:(.text._ZN8pybind1113pybind11_failEPKc[_ZN8pybind1113pybind11_failEPKc]+0x10): undefined reference to `PyErr_Occurred'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::get_thread_state_unchecked()':
main_tests.cpp:(.text._ZN8pybind116detail26get_thread_state_uncheckedEv[_ZN8pybind116detail26get_thread_state_uncheckedEv]+0x8): undefined reference to `_PyThreadState_UncheckedGet'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::get_internals()::gil_scoped_acquire_local::gil_scoped_acquire_local()':
main_tests.cpp:(.text._ZZN8pybind116detail13get_internalsEvEN24gil_scoped_acquire_localC2Ev[_ZZN8pybind116detail13get_internalsEvEN24gil_scoped_acquire_localC2Ev]+0x18): undefined reference to `PyGILState_Ensure'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::str::str(char const*)':
main_tests.cpp:(.text._ZN8pybind113strC2EPKc[_ZN8pybind113strC2EPKc]+0x20): undefined reference to `PyUnicode_FromString'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind113strC2EPKc[_ZN8pybind113strC2EPKc]+0x58): undefined reference to `PyErr_Occurred'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::capsule::capsule(void const*, char const*, void (*)(_object*))':
main_tests.cpp:(.text._ZN8pybind117capsuleC2EPKvPKcPFvP7_objectE[_ZN8pybind117capsuleC2EPKvPKcPFvP7_objectE]+0x30): undefined reference to `PyCapsule_New'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::translate_exception(std::__exception_ptr::exception_ptr)':
main_tests.cpp:(.text._ZN8pybind116detail19translate_exceptionENSt15__exception_ptr13exception_ptrE[_ZN8pybind116detail19translate_exceptionENSt15__exception_ptr13exception_ptrE]+0x10): undefined reference to `PyExc_RuntimeError'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail19translate_exceptionENSt15__exception_ptr13exception_ptrE[_ZN8pybind116detail19translate_exceptionENSt15__exception_ptr13exception_ptrE]+0x14): undefined reference to `PyExc_RuntimeError'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail19translate_exceptionENSt15__exception_ptr13exception_ptrE[_ZN8pybind116detail19translate_exceptionENSt15__exception_ptr13exception_ptrE]+0x1c): undefined reference to `PyExc_ValueError'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail19translate_exceptionENSt15__exception_ptr13exception_ptrE[_ZN8pybind116detail19translate_exceptionENSt15__exception_ptr13exception_ptrE]+0x20): undefined reference to `PyExc_ValueError'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail19translate_exceptionENSt15__exception_ptr13exception_ptrE[_ZN8pybind116detail19translate_exceptionENSt15__exception_ptr13exception_ptrE]+0x140): undefined reference to `PyExc_MemoryError'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail19translate_exceptionENSt15__exception_ptr13exception_ptrE[_ZN8pybind116detail19translate_exceptionENSt15__exception_ptr13exception_ptrE]+0x144): undefined reference to `PyExc_MemoryError'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail19translate_exceptionENSt15__exception_ptr13exception_ptrE[_ZN8pybind116detail19translate_exceptionENSt15__exception_ptr13exception_ptrE]+0x2d4): undefined reference to `PyExc_IndexError'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail19translate_exceptionENSt15__exception_ptr13exception_ptrE[_ZN8pybind116detail19translate_exceptionENSt15__exception_ptr13exception_ptrE]+0x2d8): undefined reference to `PyExc_IndexError'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail19translate_exceptionENSt15__exception_ptr13exception_ptrE[_ZN8pybind116detail19translate_exceptionENSt15__exception_ptr13exception_ptrE]+0x3a0): undefined reference to `PyExc_OverflowError'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail19translate_exceptionENSt15__exception_ptr13exception_ptrE[_ZN8pybind116detail19translate_exceptionENSt15__exception_ptr13exception_ptrE]+0x3a4): undefined reference to `PyExc_OverflowError'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::make_static_property_type()':
main_tests.cpp:(.text._ZN8pybind116detail25make_static_property_typeEv[_ZN8pybind116detail25make_static_property_typeEv]+0xc): undefined reference to `PyType_Type'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail25make_static_property_typeEv[_ZN8pybind116detail25make_static_property_typeEv]+0x10): undefined reference to `PyType_Type'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail25make_static_property_typeEv[_ZN8pybind116detail25make_static_property_typeEv]+0x28): undefined reference to `PyUnicode_FromString'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail25make_static_property_typeEv[_ZN8pybind116detail25make_static_property_typeEv]+0xf0): undefined reference to `PyProperty_Type'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail25make_static_property_typeEv[_ZN8pybind116detail25make_static_property_typeEv]+0xf4): undefined reference to `PyProperty_Type'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail25make_static_property_typeEv[_ZN8pybind116detail25make_static_property_typeEv]+0x140): undefined reference to `PyType_Ready'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::make_default_metaclass()':
main_tests.cpp:(.text._ZN8pybind116detail22make_default_metaclassEv[_ZN8pybind116detail22make_default_metaclassEv]+0xc): undefined reference to `PyType_Type'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail22make_default_metaclassEv[_ZN8pybind116detail22make_default_metaclassEv]+0x10): undefined reference to `PyType_Type'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail22make_default_metaclassEv[_ZN8pybind116detail22make_default_metaclassEv]+0x28): undefined reference to `PyUnicode_FromString'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail22make_default_metaclassEv[_ZN8pybind116detail22make_default_metaclassEv]+0x154): undefined reference to `PyType_Ready'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::make_object_base_type(_typeobject*)':
main_tests.cpp:(.text._ZN8pybind116detail21make_object_base_typeEP11_typeobject[_ZN8pybind116detail21make_object_base_typeEP11_typeobject]+0x20): undefined reference to `PyUnicode_FromString'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail21make_object_base_typeEP11_typeobject[_ZN8pybind116detail21make_object_base_typeEP11_typeobject]+0xec): undefined reference to `PyBaseObject_Type'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail21make_object_base_typeEP11_typeobject[_ZN8pybind116detail21make_object_base_typeEP11_typeobject]+0xf0): undefined reference to `PyBaseObject_Type'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail21make_object_base_typeEP11_typeobject[_ZN8pybind116detail21make_object_base_typeEP11_typeobject]+0x158): undefined reference to `PyType_Ready'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::get_internals()::gil_scoped_acquire_local::~gil_scoped_acquire_local()':
main_tests.cpp:(.text._ZZN8pybind116detail13get_internalsEvEN24gil_scoped_acquire_localD2Ev[_ZZN8pybind116detail13get_internalsEvEN24gil_scoped_acquire_localD2Ev]+0x18): undefined reference to `PyGILState_Release'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::error_fetch_and_normalize::error_fetch_and_normalize(char const*)':
main_tests.cpp:(.text._ZN8pybind116detail25error_fetch_and_normalizeC2EPKc[_ZN8pybind116detail25error_fetch_and_normalizeC2EPKc]+0xa0): undefined reference to `PyErr_Fetch'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail25error_fetch_and_normalizeC2EPKc[_ZN8pybind116detail25error_fetch_and_normalizeC2EPKc]+0x30c): undefined reference to `PyErr_NormalizeException'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::pybind11_fail(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)':
main_tests.cpp:(.text._ZN8pybind1113pybind11_failERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE[_ZN8pybind1113pybind11_failERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE]+0x10): undefined reference to `PyErr_Occurred'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::error_fetch_and_normalize::format_value_and_trace[abi:cxx11]() const':
main_tests.cpp:(.text._ZNK8pybind116detail25error_fetch_and_normalize22format_value_and_traceB5cxx11Ev[_ZNK8pybind116detail25error_fetch_and_normalize22format_value_and_traceB5cxx11Ev]+0x78): undefined reference to `PyObject_Str'
/usr/bin/ld: main_tests.cpp:(.text._ZNK8pybind116detail25error_fetch_and_normalize22format_value_and_traceB5cxx11Ev[_ZNK8pybind116detail25error_fetch_and_normalize22format_value_and_traceB5cxx11Ev]+0x138): undefined reference to `PyUnicode_AsEncodedString'
/usr/bin/ld: main_tests.cpp:(.text._ZNK8pybind116detail25error_fetch_and_normalize22format_value_and_traceB5cxx11Ev[_ZNK8pybind116detail25error_fetch_and_normalize22format_value_and_traceB5cxx11Ev]+0x1ec): undefined reference to `PyBytes_AsStringAndSize'
/usr/bin/ld: main_tests.cpp:(.text._ZNK8pybind116detail25error_fetch_and_normalize22format_value_and_traceB5cxx11Ev[_ZNK8pybind116detail25error_fetch_and_normalize22format_value_and_traceB5cxx11Ev]+0x3d4): undefined reference to `PyFrame_GetCode'
/usr/bin/ld: main_tests.cpp:(.text._ZNK8pybind116detail25error_fetch_and_normalize22format_value_and_traceB5cxx11Ev[_ZNK8pybind116detail25error_fetch_and_normalize22format_value_and_traceB5cxx11Ev]+0x3ec): undefined reference to `PyFrame_GetLineNumber'
/usr/bin/ld: main_tests.cpp:(.text._ZNK8pybind116detail25error_fetch_and_normalize22format_value_and_traceB5cxx11Ev[_ZNK8pybind116detail25error_fetch_and_normalize22format_value_and_traceB5cxx11Ev]+0x4f8): undefined reference to `PyFrame_GetBack'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::string_caster<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, false>::load(pybind11::handle, bool)':
main_tests.cpp:(.text._ZN8pybind116detail13string_casterINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELb0EE4loadENS_6handleEb[_ZN8pybind116detail13string_casterINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELb0EE4loadENS_6handleEb]+0xc4): undefined reference to `PyUnicode_AsUTF8AndSize'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail13string_casterINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELb0EE4loadENS_6handleEb[_ZN8pybind116detail13string_casterINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELb0EE4loadENS_6handleEb]+0xe0): undefined reference to `PyErr_Clear'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::str::operator std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >() const':
main_tests.cpp:(.text._ZNK8pybind113strcvNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEv[_ZNK8pybind113strcvNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEv]+0x54): undefined reference to `PyUnicode_AsUTF8String'
/usr/bin/ld: main_tests.cpp:(.text._ZNK8pybind113strcvNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEv[_ZNK8pybind113strcvNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEv]+0x138): undefined reference to `PyBytes_AsStringAndSize'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `bool pybind11::detail::string_caster<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, false>::load_raw<char>(std::enable_if<std::is_same<char, char>::value, pybind11::handle>::type)':
main_tests.cpp:(.text._ZN8pybind116detail13string_casterINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELb0EE8load_rawIcEEbNSt9enable_ifIXsr3std7is_sameIT_cEE5valueENS_6handleEE4typeE[_ZN8pybind116detail13string_casterINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELb0EE8load_rawIcEEbNSt9enable_ifIXsr3std7is_sameIT_cEE5valueENS_6handleEE4typeE]+0x54): undefined reference to `PyBytes_AsString'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail13string_casterINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELb0EE8load_rawIcEEbNSt9enable_ifIXsr3std7is_sameIT_cEE5valueENS_6handleEE4typeE[_ZN8pybind116detail13string_casterINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELb0EE8load_rawIcEEbNSt9enable_ifIXsr3std7is_sameIT_cEE5valueENS_6handleEE4typeE]+0x90): undefined reference to `PyBytes_Size'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail13string_casterINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELb0EE8load_rawIcEEbNSt9enable_ifIXsr3std7is_sameIT_cEE5valueENS_6handleEE4typeE[_ZN8pybind116detail13string_casterINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELb0EE8load_rawIcEEbNSt9enable_ifIXsr3std7is_sameIT_cEE5valueENS_6handleEE4typeE]+0x114): undefined reference to `PyByteArray_Type'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail13string_casterINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELb0EE8load_rawIcEEbNSt9enable_ifIXsr3std7is_sameIT_cEE5valueENS_6handleEE4typeE[_ZN8pybind116detail13string_casterINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELb0EE8load_rawIcEEbNSt9enable_ifIXsr3std7is_sameIT_cEE5valueENS_6handleEE4typeE]+0x118): undefined reference to `PyByteArray_Type'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail13string_casterINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELb0EE8load_rawIcEEbNSt9enable_ifIXsr3std7is_sameIT_cEE5valueENS_6handleEE4typeE[_ZN8pybind116detail13string_casterINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELb0EE8load_rawIcEEbNSt9enable_ifIXsr3std7is_sameIT_cEE5valueENS_6handleEE4typeE]+0x13c): undefined reference to `PyByteArray_AsString'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail13string_casterINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELb0EE8load_rawIcEEbNSt9enable_ifIXsr3std7is_sameIT_cEE5valueENS_6handleEE4typeE[_ZN8pybind116detail13string_casterINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELb0EE8load_rawIcEEbNSt9enable_ifIXsr3std7is_sameIT_cEE5valueENS_6handleEE4typeE]+0x178): undefined reference to `PyByteArray_Size'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::str::raw_str(_object*)':
main_tests.cpp:(.text._ZN8pybind113str7raw_strEP7_object[_ZN8pybind113str7raw_strEP7_object]+0x14): undefined reference to `PyObject_Str'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::cast_error::set_error() const':
main_tests.cpp:(.text._ZNK8pybind1110cast_error9set_errorEv[_ZNK8pybind1110cast_error9set_errorEv]+0x14): undefined reference to `PyExc_RuntimeError'
/usr/bin/ld: main_tests.cpp:(.text._ZNK8pybind1110cast_error9set_errorEv[_ZNK8pybind1110cast_error9set_errorEv]+0x18): undefined reference to `PyExc_RuntimeError'
/usr/bin/ld: main_tests.cpp:(.text._ZNK8pybind1110cast_error9set_errorEv[_ZNK8pybind1110cast_error9set_errorEv]+0x38): undefined reference to `PyErr_SetString'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::object pybind11::detail::object_api<pybind11::detail::accessor<pybind11::detail::accessor_policies::str_attr> >::operator()<(pybind11::return_value_policy)1, pybind11::str&>(pybind11::str&) const':
main_tests.cpp:(.text._ZNK8pybind116detail10object_apiINS0_8accessorINS0_17accessor_policies8str_attrEEEEclILNS_19return_value_policyE1EJRNS_3strEEEENS_6objectEDpOT0_[_ZNK8pybind116detail10object_apiINS0_8accessorINS0_17accessor_policies8str_attrEEEEclILNS_19return_value_policyE1EJRNS_3strEEEENS_6objectEDpOT0_]+0x24): undefined reference to `PyGILState_Check'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::simple_collector<(pybind11::return_value_policy)1>::call(_object*) const':
main_tests.cpp:(.text._ZNK8pybind116detail16simple_collectorILNS_19return_value_policyE1EE4callEP7_object[_ZNK8pybind116detail16simple_collectorILNS_19return_value_policyE1EE4callEP7_object]+0x34): undefined reference to `PyObject_CallObject'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::tuple::tuple<unsigned long, 0>(unsigned long)':
main_tests.cpp:(.text._ZN8pybind115tupleC2ImLi0EEET_[_ZN8pybind115tupleC2ImLi0EEET_]+0x24): undefined reference to `PyTuple_New'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::getattr(pybind11::handle, char const*)':
main_tests.cpp:(.text._ZN8pybind117getattrENS_6handleEPKc[_ZN8pybind117getattrENS_6handleEPKc]+0x34): undefined reference to `PyObject_GetAttrString'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::type_caster<bool, void>::load(pybind11::handle, bool)':
main_tests.cpp:(.text._ZN8pybind116detail11type_casterIbvE4loadENS_6handleEb[_ZN8pybind116detail11type_casterIbvE4loadENS_6handleEb]+0x5c): undefined reference to `_Py_TrueStruct'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail11type_casterIbvE4loadENS_6handleEb[_ZN8pybind116detail11type_casterIbvE4loadENS_6handleEb]+0x60): undefined reference to `_Py_TrueStruct'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail11type_casterIbvE4loadENS_6handleEb[_ZN8pybind116detail11type_casterIbvE4loadENS_6handleEb]+0xa0): undefined reference to `_Py_FalseStruct'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail11type_casterIbvE4loadENS_6handleEb[_ZN8pybind116detail11type_casterIbvE4loadENS_6handleEb]+0xa4): undefined reference to `_Py_FalseStruct'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail11type_casterIbvE4loadENS_6handleEb[_ZN8pybind116detail11type_casterIbvE4loadENS_6handleEb]+0x200): undefined reference to `PyErr_Clear'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::object_api<pybind11::handle>::is_none() const':
main_tests.cpp:(.text._ZNK8pybind116detail10object_apiINS_6handleEE7is_noneEv[_ZNK8pybind116detail10object_apiINS_6handleEE7is_noneEv]+0x1c): undefined reference to `_Py_NoneStruct'
/usr/bin/ld: main_tests.cpp:(.text._ZNK8pybind116detail10object_apiINS_6handleEE7is_noneEv[_ZNK8pybind116detail10object_apiINS_6handleEE7is_noneEv]+0x20): undefined reference to `_Py_NoneStruct'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::capsule::check_(pybind11::handle)':
main_tests.cpp:(.text._ZN8pybind117capsule6check_ENS_6handleE[_ZN8pybind117capsule6check_ENS_6handleE]+0x44): undefined reference to `PyCapsule_Type'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind117capsule6check_ENS_6handleE[_ZN8pybind117capsule6check_ENS_6handleE]+0x48): undefined reference to `PyCapsule_Type'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::accessor_policies::generic_item::get(pybind11::handle, pybind11::handle)':
main_tests.cpp:(.text._ZN8pybind116detail17accessor_policies12generic_item3getENS_6handleES3_[_ZN8pybind116detail17accessor_policies12generic_item3getENS_6handleES3_]+0x54): undefined reference to `PyObject_GetItem'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::type_error::set_error() const':
main_tests.cpp:(.text._ZNK8pybind1110type_error9set_errorEv[_ZNK8pybind1110type_error9set_errorEv]+0x14): undefined reference to `PyExc_TypeError'
/usr/bin/ld: main_tests.cpp:(.text._ZNK8pybind1110type_error9set_errorEv[_ZNK8pybind1110type_error9set_errorEv]+0x18): undefined reference to `PyExc_TypeError'
/usr/bin/ld: main_tests.cpp:(.text._ZNK8pybind1110type_error9set_errorEv[_ZNK8pybind1110type_error9set_errorEv]+0x38): undefined reference to `PyErr_SetString'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::internals** pybind11::capsule::get_pointer<pybind11::detail::internals*>() const':
main_tests.cpp:(.text._ZNK8pybind117capsule11get_pointerIPNS_6detail9internalsEEEPT_v[_ZNK8pybind117capsule11get_pointerIPNS_6detail9internalsEEEPT_v]+0x2c): undefined reference to `PyCapsule_GetPointer'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::capsule::name() const':
main_tests.cpp:(.text._ZNK8pybind117capsule4nameEv[_ZNK8pybind117capsule4nameEv]+0x18): undefined reference to `PyCapsule_GetName'
/usr/bin/ld: main_tests.cpp:(.text._ZNK8pybind117capsule4nameEv[_ZNK8pybind117capsule4nameEv]+0x34): undefined reference to `PyErr_Occurred'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::accessor_policies::generic_item::set(pybind11::handle, pybind11::handle, pybind11::handle)':
main_tests.cpp:(.text._ZN8pybind116detail17accessor_policies12generic_item3setENS_6handleES3_S3_[_ZN8pybind116detail17accessor_policies12generic_item3setENS_6handleES3_S3_]+0x6c): undefined reference to `PyObject_SetItem'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::raise_err(_object*, char const*)':
main_tests.cpp:(.text._ZN8pybind116detail9raise_errEP7_objectPKc[_ZN8pybind116detail9raise_errEP7_objectPKc]+0x14): undefined reference to `PyErr_Occurred'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail9raise_errEP7_objectPKc[_ZN8pybind116detail9raise_errEP7_objectPKc]+0x50): undefined reference to `PyErr_SetString'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::raise_from(_object*, char const*)':
main_tests.cpp:(.text._ZN8pybind1110raise_fromEP7_objectPKc[_ZN8pybind1110raise_fromEP7_objectPKc]+0x24): undefined reference to `PyErr_Occurred'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1110raise_fromEP7_objectPKc[_ZN8pybind1110raise_fromEP7_objectPKc]+0x74): undefined reference to `PyErr_Fetch'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1110raise_fromEP7_objectPKc[_ZN8pybind1110raise_fromEP7_objectPKc]+0x84): undefined reference to `PyErr_NormalizeException'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1110raise_fromEP7_objectPKc[_ZN8pybind1110raise_fromEP7_objectPKc]+0xa4): undefined reference to `PyException_SetTraceback'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1110raise_fromEP7_objectPKc[_ZN8pybind1110raise_fromEP7_objectPKc]+0xbc): undefined reference to `PyErr_Occurred'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1110raise_fromEP7_objectPKc[_ZN8pybind1110raise_fromEP7_objectPKc]+0xfc): undefined reference to `PyErr_SetString'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1110raise_fromEP7_objectPKc[_ZN8pybind1110raise_fromEP7_objectPKc]+0x118): undefined reference to `PyErr_Fetch'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1110raise_fromEP7_objectPKc[_ZN8pybind1110raise_fromEP7_objectPKc]+0x128): undefined reference to `PyErr_NormalizeException'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1110raise_fromEP7_objectPKc[_ZN8pybind1110raise_fromEP7_objectPKc]+0x13c): undefined reference to `PyException_SetCause'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1110raise_fromEP7_objectPKc[_ZN8pybind1110raise_fromEP7_objectPKc]+0x148): undefined reference to `PyException_SetContext'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1110raise_fromEP7_objectPKc[_ZN8pybind1110raise_fromEP7_objectPKc]+0x158): undefined reference to `PyErr_Restore'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::error_fetch_and_normalize::restore()':
main_tests.cpp:(.text._ZN8pybind116detail25error_fetch_and_normalize7restoreEv[_ZN8pybind116detail25error_fetch_and_normalize7restoreEv]+0xa8): undefined reference to `PyErr_Restore'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11_static_get':
main_tests.cpp:(.text.pybind11_static_get[pybind11_static_get]+0xc): undefined reference to `PyProperty_Type'
/usr/bin/ld: main_tests.cpp:(.text.pybind11_static_get[pybind11_static_get]+0x10): undefined reference to `PyProperty_Type'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11_static_set':
main_tests.cpp:(.text.pybind11_static_set[pybind11_static_set]+0xc): undefined reference to `PyProperty_Type'
/usr/bin/ld: main_tests.cpp:(.text.pybind11_static_set[pybind11_static_set]+0x10): undefined reference to `PyProperty_Type'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::setattr(pybind11::handle, char const*, pybind11::handle)':
main_tests.cpp:(.text._ZN8pybind117setattrENS_6handleEPKcS0_[_ZN8pybind117setattrENS_6handleEPKcS0_]+0x58): undefined reference to `PyObject_SetAttrString'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11_meta_call':
main_tests.cpp:(.text.pybind11_meta_call[pybind11_meta_call]+0x18): undefined reference to `PyType_Type'
/usr/bin/ld: main_tests.cpp:(.text.pybind11_meta_call[pybind11_meta_call]+0x1c): undefined reference to `PyType_Type'
/usr/bin/ld: main_tests.cpp:(.text.pybind11_meta_call[pybind11_meta_call]+0xe0): undefined reference to `PyExc_TypeError'
/usr/bin/ld: main_tests.cpp:(.text.pybind11_meta_call[pybind11_meta_call]+0xe4): undefined reference to `PyExc_TypeError'
/usr/bin/ld: main_tests.cpp:(.text.pybind11_meta_call[pybind11_meta_call]+0x120): undefined reference to `PyErr_Format'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11_meta_setattro':
main_tests.cpp:(.text.pybind11_meta_setattro[pybind11_meta_setattro]+0xc): undefined reference to `PyType_Type'
/usr/bin/ld: main_tests.cpp:(.text.pybind11_meta_setattro[pybind11_meta_setattro]+0x10): undefined reference to `PyType_Type'
/usr/bin/ld: main_tests.cpp:(.text.pybind11_meta_setattro[pybind11_meta_setattro]+0x2c): undefined reference to `_PyType_Lookup'
/usr/bin/ld: main_tests.cpp:(.text.pybind11_meta_setattro[pybind11_meta_setattro]+0x80): undefined reference to `PyObject_IsInstance'
/usr/bin/ld: main_tests.cpp:(.text.pybind11_meta_setattro[pybind11_meta_setattro]+0xa4): undefined reference to `PyObject_IsInstance'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11_meta_getattro':
main_tests.cpp:(.text.pybind11_meta_getattro[pybind11_meta_getattro]+0xc): undefined reference to `PyType_Type'
/usr/bin/ld: main_tests.cpp:(.text.pybind11_meta_getattro[pybind11_meta_getattro]+0x10): undefined reference to `PyType_Type'
/usr/bin/ld: main_tests.cpp:(.text.pybind11_meta_getattro[pybind11_meta_getattro]+0x28): undefined reference to `_PyType_Lookup'
/usr/bin/ld: main_tests.cpp:(.text.pybind11_meta_getattro[pybind11_meta_getattro]+0x48): undefined reference to `PyInstanceMethod_Type'
/usr/bin/ld: main_tests.cpp:(.text.pybind11_meta_getattro[pybind11_meta_getattro]+0x4c): undefined reference to `PyInstanceMethod_Type'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11_meta_dealloc':
main_tests.cpp:(.text.pybind11_meta_dealloc[pybind11_meta_dealloc]+0xc): undefined reference to `PyType_Type'
/usr/bin/ld: main_tests.cpp:(.text.pybind11_meta_dealloc[pybind11_meta_dealloc]+0x10): undefined reference to `PyType_Type'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::weakref::weakref(pybind11::handle, pybind11::handle)':
main_tests.cpp:(.text._ZN8pybind117weakrefC2ENS_6handleES1_[_ZN8pybind117weakrefC2ENS_6handleES1_]+0x54): undefined reference to `PyWeakref_NewRef'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind117weakrefC2ENS_6handleES1_[_ZN8pybind117weakrefC2ENS_6handleES1_]+0x8c): undefined reference to `PyErr_Occurred'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::cpp_function::initialize_generic(std::unique_ptr<pybind11::detail::function_record, pybind11::cpp_function::InitializingFunctionRecordDeleter>&&, char const*, std::type_info const* const*, unsigned long)':
main_tests.cpp:(.text._ZN8pybind1112cpp_function18initialize_genericEOSt10unique_ptrINS_6detail15function_recordENS0_33InitializingFunctionRecordDeleterEEPKcPKPKSt9type_infom[_ZN8pybind1112cpp_function18initialize_genericEOSt10unique_ptrINS_6detail15function_recordENS0_33InitializingFunctionRecordDeleterEEPKcPKPKSt9type_infom]+0x350): undefined reference to `PyExc_FutureWarning'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1112cpp_function18initialize_genericEOSt10unique_ptrINS_6detail15function_recordENS0_33InitializingFunctionRecordDeleterEEPKcPKPKSt9type_infom[_ZN8pybind1112cpp_function18initialize_genericEOSt10unique_ptrINS_6detail15function_recordENS0_33InitializingFunctionRecordDeleterEEPKcPKPKSt9type_infom]+0x354): undefined reference to `PyExc_FutureWarning'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1112cpp_function18initialize_genericEOSt10unique_ptrINS_6detail15function_recordENS0_33InitializingFunctionRecordDeleterEEPKcPKPKSt9type_infom[_ZN8pybind1112cpp_function18initialize_genericEOSt10unique_ptrINS_6detail15function_recordENS0_33InitializingFunctionRecordDeleterEEPKcPKPKSt9type_infom]+0x3d0): undefined reference to `PyErr_WarnEx'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1112cpp_function18initialize_genericEOSt10unique_ptrINS_6detail15function_recordENS0_33InitializingFunctionRecordDeleterEEPKcPKPKSt9type_infom[_ZN8pybind1112cpp_function18initialize_genericEOSt10unique_ptrINS_6detail15function_recordENS0_33InitializingFunctionRecordDeleterEEPKcPKPKSt9type_infom]+0xd54): undefined reference to `PyInstanceMethod_Type'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1112cpp_function18initialize_genericEOSt10unique_ptrINS_6detail15function_recordENS0_33InitializingFunctionRecordDeleterEEPKcPKPKSt9type_infom[_ZN8pybind1112cpp_function18initialize_genericEOSt10unique_ptrINS_6detail15function_recordENS0_33InitializingFunctionRecordDeleterEEPKcPKPKSt9type_infom]+0xd58): undefined reference to `PyInstanceMethod_Type'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1112cpp_function18initialize_genericEOSt10unique_ptrINS_6detail15function_recordENS0_33InitializingFunctionRecordDeleterEEPKcPKPKSt9type_infom[_ZN8pybind1112cpp_function18initialize_genericEOSt10unique_ptrINS_6detail15function_recordENS0_33InitializingFunctionRecordDeleterEEPKcPKPKSt9type_infom]+0xdd0): undefined reference to `PyCFunction_Type'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1112cpp_function18initialize_genericEOSt10unique_ptrINS_6detail15function_recordENS0_33InitializingFunctionRecordDeleterEEPKcPKPKSt9type_infom[_ZN8pybind1112cpp_function18initialize_genericEOSt10unique_ptrINS_6detail15function_recordENS0_33InitializingFunctionRecordDeleterEEPKcPKPKSt9type_infom]+0xdd4): undefined reference to `PyCFunction_Type'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1112cpp_function18initialize_genericEOSt10unique_ptrINS_6detail15function_recordENS0_33InitializingFunctionRecordDeleterEEPKcPKPKSt9type_infom[_ZN8pybind1112cpp_function18initialize_genericEOSt10unique_ptrINS_6detail15function_recordENS0_33InitializingFunctionRecordDeleterEEPKcPKPKSt9type_infom]+0x12cc): undefined reference to `PyCMethod_New'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1112cpp_function18initialize_genericEOSt10unique_ptrINS_6detail15function_recordENS0_33InitializingFunctionRecordDeleterEEPKcPKPKSt9type_infom[_ZN8pybind1112cpp_function18initialize_genericEOSt10unique_ptrINS_6detail15function_recordENS0_33InitializingFunctionRecordDeleterEEPKcPKPKSt9type_infom]+0x1a68): undefined reference to `PyInstanceMethod_New'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::none::none()':
main_tests.cpp:(.text._ZN8pybind114noneC2Ev[_ZN8pybind114noneC2Ev]+0x1c): undefined reference to `_Py_NoneStruct'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind114noneC2Ev[_ZN8pybind114noneC2Ev]+0x20): undefined reference to `_Py_NoneStruct'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::repr(pybind11::handle)':
main_tests.cpp:(.text._ZN8pybind114reprENS_6handleE[_ZN8pybind114reprENS_6handleE]+0x2c): undefined reference to `PyObject_Repr'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::function_record* pybind11::capsule::get_pointer<pybind11::detail::function_record>() const':
main_tests.cpp:(.text._ZNK8pybind117capsule11get_pointerINS_6detail15function_recordEEEPT_v[_ZNK8pybind117capsule11get_pointerINS_6detail15function_recordEEEPT_v]+0x2c): undefined reference to `PyCapsule_GetPointer'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::cpp_function::dispatcher(_object*, _object*, _object*)':
main_tests.cpp:(.text._ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_[_ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_]+0x18): undefined reference to `PyExc_TypeError'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_[_ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_]+0x1c): undefined reference to `PyExc_TypeError'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_[_ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_]+0x84): undefined reference to `PyCapsule_GetPointer'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_[_ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_]+0x228): undefined reference to `PyErr_SetString'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_[_ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_]+0x998): undefined reference to `PyDict_Copy'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_[_ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_]+0x9fc): undefined reference to `PyDict_DelItemString'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_[_ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_]+0x14d4): undefined reference to `PyExc_SystemError'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_[_ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_]+0x14d8): undefined reference to `PyExc_SystemError'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_[_ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_]+0x14e8): undefined reference to `PyErr_SetString'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_[_ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_]+0x157c): undefined reference to `_Py_NotImplementedStruct'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_[_ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_]+0x1580): undefined reference to `_Py_NotImplementedStruct'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_[_ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_]+0x1f98): undefined reference to `PyErr_Occurred'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_[_ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_]+0x2008): undefined reference to `PyErr_SetString'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_[_ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_]+0x20ac): undefined reference to `PyErr_Occurred'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_[_ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_]+0x214c): undefined reference to `PyErr_SetString'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::capsule::capsule(void const*, void (*)(void*))':
main_tests.cpp:(.text._ZN8pybind117capsuleC2EPKvPFvPvE[_ZN8pybind117capsuleC2EPKvPFvPvE]+0x40): undefined reference to `PyCapsule_New'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind117capsuleC2EPKvPFvPvE[_ZN8pybind117capsuleC2EPKvPFvPvE]+0x78): undefined reference to `PyCapsule_SetContext'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::capsule::set_name(char const*)':
main_tests.cpp:(.text._ZN8pybind117capsule8set_nameEPKc[_ZN8pybind117capsule8set_nameEPKc]+0x20): undefined reference to `PyCapsule_SetName'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::hasattr(pybind11::handle, char const*)':
main_tests.cpp:(.text._ZN8pybind117hasattrENS_6handleEPKc[_ZN8pybind117hasattrENS_6handleEPKc]+0x28): undefined reference to `PyObject_HasAttrString'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::capsule::set_pointer(void const*)':
main_tests.cpp:(.text._ZN8pybind117capsule11set_pointerEPKv[_ZN8pybind117capsule11set_pointerEPKv]+0x20): undefined reference to `PyCapsule_SetPointer'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::local_internals::shared_loader_life_support_data::shared_loader_life_support_data()':
main_tests.cpp:(.text._ZN8pybind116detail15local_internals31shared_loader_life_support_dataC2Ev[_ZN8pybind116detail15local_internals31shared_loader_life_support_dataC2Ev]+0x1c): undefined reference to `PyThread_tss_alloc'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail15local_internals31shared_loader_life_support_dataC2Ev[_ZN8pybind116detail15local_internals31shared_loader_life_support_dataC2Ev]+0x44): undefined reference to `PyThread_tss_create'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::dict_getitemstring(_object*, char const*)':
main_tests.cpp:(.text._ZN8pybind116detail18dict_getitemstringEP7_objectPKc[_ZN8pybind116detail18dict_getitemstringEP7_objectPKc]+0x20): undefined reference to `PyUnicode_FromString'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail18dict_getitemstringEP7_objectPKc[_ZN8pybind116detail18dict_getitemstringEP7_objectPKc]+0x8c): undefined reference to `PyDict_GetItemWithError'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail18dict_getitemstringEP7_objectPKc[_ZN8pybind116detail18dict_getitemstringEP7_objectPKc]+0xb0): undefined reference to `PyErr_Occurred'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::tuple::tuple<long, 0>(long)':
main_tests.cpp:(.text._ZN8pybind115tupleC2IlLi0EEET_[_ZN8pybind115tupleC2IlLi0EEET_]+0x24): undefined reference to `PyTuple_New'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::tuple::tuple<int, 0>(int)':
main_tests.cpp:(.text._ZN8pybind115tupleC2IiLi0EEET_[_ZN8pybind115tupleC2IiLi0EEET_]+0x24): undefined reference to `PyTuple_New'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::dict::dict()':
main_tests.cpp:(.text._ZN8pybind114dictC2Ev[_ZN8pybind114dictC2Ev]+0x18): undefined reference to `PyDict_New'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::tuple::size() const':
main_tests.cpp:(.text._ZNK8pybind115tuple4sizeEv[_ZNK8pybind115tuple4sizeEv]+0x18): undefined reference to `PyTuple_Size'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::dict::size() const':
main_tests.cpp:(.text._ZNK8pybind114dict4sizeEv[_ZNK8pybind114dict4sizeEv]+0x18): undefined reference to `PyDict_Size'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `void pybind11::detail::accessor_policies::tuple_item::set<unsigned long, 0>(pybind11::handle, unsigned long const&, pybind11::handle)':
main_tests.cpp:(.text._ZN8pybind116detail17accessor_policies10tuple_item3setImLi0EEEvNS_6handleERKT_S4_[_ZN8pybind116detail17accessor_policies10tuple_item3setImLi0EEEvNS_6handleERKT_S4_]+0x5c): undefined reference to `PyTuple_SetItem'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::loader_life_support::get_stack_top()':
main_tests.cpp:(.text._ZN8pybind116detail19loader_life_support13get_stack_topEv[_ZN8pybind116detail19loader_life_support13get_stack_topEv]+0xc): undefined reference to `PyThread_tss_get'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::loader_life_support::set_stack_top(pybind11::detail::loader_life_support*)':
main_tests.cpp:(.text._ZN8pybind116detail19loader_life_support13set_stack_topEPS1_[_ZN8pybind116detail19loader_life_support13set_stack_topEPS1_]+0x18): undefined reference to `PyThread_tss_set'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::object pybind11::detail::accessor_policies::tuple_item::get<unsigned long, 0>(pybind11::handle, unsigned long const&)':
main_tests.cpp:(.text._ZN8pybind116detail17accessor_policies10tuple_item3getImLi0EEENS_6objectENS_6handleERKT_[_ZN8pybind116detail17accessor_policies10tuple_item3getImLi0EEENS_6objectENS_6handleERKT_]+0x44): undefined reference to `PyTuple_GetItem'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::iterator_policies::dict_readonly::increment()':
main_tests.cpp:(.text._ZN8pybind116detail17iterator_policies13dict_readonly9incrementEv[_ZN8pybind116detail17iterator_policies13dict_readonly9incrementEv]+0x30): undefined reference to `PyDict_Next'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::object pybind11::detail::object_api<pybind11::detail::accessor<pybind11::detail::accessor_policies::str_attr> >::operator()<(pybind11::return_value_policy)1, pybind11::handle&>(pybind11::handle&) const':
main_tests.cpp:(.text._ZNK8pybind116detail10object_apiINS0_8accessorINS0_17accessor_policies8str_attrEEEEclILNS_19return_value_policyE1EJRNS_6handleEEEENS_6objectEDpOT0_[_ZNK8pybind116detail10object_apiINS0_8accessorINS0_17accessor_policies8str_attrEEEEclILNS_19return_value_policyE1EJRNS_6handleEEEENS_6objectEDpOT0_]+0x24): undefined reference to `PyGILState_Check'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::capsule::capsule(void const*, void (*)(void*))::{lambda(_object*)#1}::operator()(_object*) const':
main_tests.cpp:(.text._ZZN8pybind117capsuleC1EPKvPFvPvEENKUlP7_objectE_clES7_[_ZZN8pybind117capsuleC1EPKvPFvPvEENKUlP7_objectE_clES7_]+0x20): undefined reference to `PyCapsule_GetContext'
/usr/bin/ld: main_tests.cpp:(.text._ZZN8pybind117capsuleC1EPKvPFvPvEENKUlP7_objectE_clES7_[_ZZN8pybind117capsuleC1EPKvPFvPvEENKUlP7_objectE_clES7_]+0x48): undefined reference to `PyErr_Occurred'
/usr/bin/ld: main_tests.cpp:(.text._ZZN8pybind117capsuleC1EPKvPFvPvEENKUlP7_objectE_clES7_[_ZZN8pybind117capsuleC1EPKvPFvPvEENKUlP7_objectE_clES7_]+0xe4): undefined reference to `PyCapsule_GetPointer'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::capsule::get_name_in_error_scope(_object*)':
main_tests.cpp:(.text._ZN8pybind117capsule23get_name_in_error_scopeEP7_object[_ZN8pybind117capsule23get_name_in_error_scopeEP7_object]+0x1c): undefined reference to `PyCapsule_GetName'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind117capsule23get_name_in_error_scopeEP7_object[_ZN8pybind117capsule23get_name_in_error_scopeEP7_object]+0x44): undefined reference to `PyErr_Occurred'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind117capsule23get_name_in_error_scopeEP7_object[_ZN8pybind117capsule23get_name_in_error_scopeEP7_object]+0x68): undefined reference to `PyErr_WriteUnraisable'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11_object_init':
main_tests.cpp:(.text.pybind11_object_init[pybind11_object_init]+0x54): undefined reference to `PyExc_TypeError'
/usr/bin/ld: main_tests.cpp:(.text.pybind11_object_init[pybind11_object_init]+0x58): undefined reference to `PyExc_TypeError'
/usr/bin/ld: main_tests.cpp:(.text.pybind11_object_init[pybind11_object_init]+0x74): undefined reference to `PyErr_SetString'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11_object_dealloc':
main_tests.cpp:(.text.pybind11_object_dealloc[pybind11_object_dealloc]+0x3c): undefined reference to `PyObject_GC_UnTrack'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::instance::allocate_layout()':
main_tests.cpp:(.text._ZN8pybind116detail8instance15allocate_layoutEv[_ZN8pybind116detail8instance15allocate_layoutEv]+0x190): undefined reference to `PyMem_Calloc'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::clear_instance(_object*)':
main_tests.cpp:(.text._ZN8pybind116detail14clear_instanceEP7_object[_ZN8pybind116detail14clear_instanceEP7_object]+0x138): undefined reference to `PyObject_ClearWeakRefs'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind116detail14clear_instanceEP7_object[_ZN8pybind116detail14clear_instanceEP7_object]+0x144): undefined reference to `_PyObject_GetDictPtr'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::instance::deallocate_layout()':
main_tests.cpp:(.text._ZN8pybind116detail8instance17deallocate_layoutEv[_ZN8pybind116detail8instance17deallocate_layoutEv]+0x2c): undefined reference to `PyMem_Free'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::gil_scoped_acquire::dec_ref()':
main_tests.cpp:(.text._ZN8pybind1118gil_scoped_acquire7dec_refEv[_ZN8pybind1118gil_scoped_acquire7dec_refEv]+0xb8): undefined reference to `PyThreadState_Clear'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1118gil_scoped_acquire7dec_refEv[_ZN8pybind1118gil_scoped_acquire7dec_refEv]+0xcc): undefined reference to `PyThreadState_DeleteCurrent'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1118gil_scoped_acquire7dec_refEv[_ZN8pybind1118gil_scoped_acquire7dec_refEv]+0xe0): undefined reference to `PyThread_tss_set'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::initialize_interpreter(bool, int, char const* const*, bool)':
main_tests.cpp:(.text._ZN8pybind1122initialize_interpreterEbiPKPKcb[_ZN8pybind1122initialize_interpreterEbiPKPKcb]+0x38): undefined reference to `PyConfig_InitIsolatedConfig'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::initialize_interpreter(PyConfig*, int, char const* const*, bool)':
main_tests.cpp:(.text._ZN8pybind1122initialize_interpreterEP8PyConfigiPKPKcb[_ZN8pybind1122initialize_interpreterEP8PyConfigiPKPKcb]+0x3c): undefined reference to `PyConfig_SetBytesArgv'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1122initialize_interpreterEP8PyConfigiPKPKcb[_ZN8pybind1122initialize_interpreterEP8PyConfigiPKPKcb]+0x54): undefined reference to `PyStatus_Exception'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1122initialize_interpreterEP8PyConfigiPKPKcb[_ZN8pybind1122initialize_interpreterEP8PyConfigiPKPKcb]+0x6c): undefined reference to `PyConfig_Clear'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1122initialize_interpreterEP8PyConfigiPKPKcb[_ZN8pybind1122initialize_interpreterEP8PyConfigiPKPKcb]+0x90): undefined reference to `PyStatus_IsError'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1122initialize_interpreterEP8PyConfigiPKPKcb[_ZN8pybind1122initialize_interpreterEP8PyConfigiPKPKcb]+0x118): undefined reference to `Py_InitializeFromConfig'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1122initialize_interpreterEP8PyConfigiPKPKcb[_ZN8pybind1122initialize_interpreterEP8PyConfigiPKPKcb]+0x140): undefined reference to `PyStatus_Exception'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1122initialize_interpreterEP8PyConfigiPKPKcb[_ZN8pybind1122initialize_interpreterEP8PyConfigiPKPKcb]+0x158): undefined reference to `PyConfig_Clear'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1122initialize_interpreterEP8PyConfigiPKPKcb[_ZN8pybind1122initialize_interpreterEP8PyConfigiPKPKcb]+0x17c): undefined reference to `PyStatus_IsError'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1122initialize_interpreterEP8PyConfigiPKPKcb[_ZN8pybind1122initialize_interpreterEP8PyConfigiPKPKcb]+0x214): undefined reference to `PyRun_SimpleStringFlags'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1122initialize_interpreterEP8PyConfigiPKPKcb[_ZN8pybind1122initialize_interpreterEP8PyConfigiPKPKcb]+0x220): undefined reference to `PyConfig_Clear'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::precheck_interpreter()':
main_tests.cpp:(.text._ZN8pybind116detail20precheck_interpreterEv[_ZN8pybind116detail20precheck_interpreterEv]+0x8): undefined reference to `Py_IsInitialized'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::finalize_interpreter()':
main_tests.cpp:(.text._ZN8pybind1120finalize_interpreterEv[_ZN8pybind1120finalize_interpreterEv]+0xc): undefined reference to `PyEval_GetBuiltins'
/usr/bin/ld: main_tests.cpp:(.text._ZN8pybind1120finalize_interpreterEv[_ZN8pybind1120finalize_interpreterEv]+0x218): undefined reference to `Py_Finalize'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::internals::~internals()':
main_tests.cpp:(.text._ZN8pybind116detail9internalsD2Ev[_ZN8pybind116detail9internalsD2Ev]+0x1c): undefined reference to `PyThread_tss_free'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::object pybind11::detail::object_api<pybind11::detail::accessor<pybind11::detail::accessor_policies::str_attr> >::operator()<(pybind11::return_value_policy)1, char const*&>(char const*&) const':
main_tests.cpp:(.text._ZNK8pybind116detail10object_apiINS0_8accessorINS0_17accessor_policies8str_attrEEEEclILNS_19return_value_policyE1EJRPKcEEENS_6objectEDpOT0_[_ZNK8pybind116detail10object_apiINS0_8accessorINS0_17accessor_policies8str_attrEEEEclILNS_19return_value_policyE1EJRPKcEEENS_6objectEDpOT0_]+0x24): undefined reference to `PyGILState_Check'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/main_tests.cpp.o: in function `pybind11::detail::string_caster<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, false>::decode_utfN(char const*, long)':
main_tests.cpp:(.text._ZN8pybind116detail13string_casterINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELb0EE11decode_utfNEPKcl[_ZN8pybind116detail13string_casterINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEELb0EE11decode_utfNEPKcl]+0x20): undefined reference to `PyUnicode_DecodeUTF8'
/usr/bin/ld: /usr/bin/ld: DWARF error: invalid or unhandled FORM value: 0x23
CMakeFiles/reinforce_tests_gridworld.dir/test/libreinforce/test_gridworld.cpp.o: in function `_Py_DECREF(_object*)':
test_gridworld.cpp:(.text+0x2034): undefined reference to `_Py_Dealloc'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/libreinforce/test_gridworld.cpp.o: in function `_PyObject_TypeCheck(_object*, _typeobject*)':
test_gridworld.cpp:(.text+0x20e0): undefined reference to `PyType_IsSubtype'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/libreinforce/test_gridworld.cpp.o: in function `pybind11::module_::import(char const*)':
test_gridworld.cpp:(.text._ZN8pybind117module_6importEPKc[_ZN8pybind117module_6importEPKc]+0x1c): undefined reference to `PyImport_ImportModule'
/usr/bin/ld: CMakeFiles/reinforce_tests_gridworld.dir/test/libreinforce/test_gridworld.cpp.o: in function `pybind11::detail::npy_api::lookup()':
test_gridworld.cpp:(.text._ZN8pybind116detail7npy_api6lookupEv[_ZN8pybind116detail7npy_api6lookupEv]+0x54): undefined reference to `PyCapsule_GetPointer'
clang: error: linker command failed with exit code 1 (use -v to see invocation)
ninja: build stopped: subcommand failed.

Case 2:

set(PYBIND11_FINDPYTHON FALSE)
find_package(Python3 REQUIRED COMPONENTS Interpreter Development NumPy)

then I find Python3 again all the same,

-- Found Python3: /usr/bin/python3.10 (found version "3.10.12") found components: Interpreter Development NumPy Development.Module Development.Embed

yet linking only pybind11::module brings the same linker errors.

However, once I also link ${Python3_LIBRARIES} the linker errors are resolved and it compiles just fine.

I can't imagine this being the expected behaviour, as this leaves PYBIND11_FINDPYTHON broken due to always needing to call FindPython manually to have Python3_LIBRARIES available. But I would like to ask here first: Is manual linking against Python3_LIBRARIESmeant to be required or where am I missing a step?

My setup is:

• Ubuntu 22.04 in a docker container (the image installs python3 python3-pip python3-dev, so the deps are available)
• pybind11 v2.10.4 pulled in by Conan (the pkg manager).