error building - ubuntu 24.04

[mirpouya]

I tried with numerous versions in ubuntu 24.04, outside conda, in conda env, python 3.12, python 3.8, eigen 3.4.0, eigen 3.3.9 non works and I also modified
.def("x", (double (Eigen::Quaterniond::) () const) &Eigen::Quaterniond::x)
.def("y", (double (Eigen::Quaterniond::) () const) &Eigen::Quaterniond::y)
.def("z", (double (Eigen::Quaterniond::) () const) &Eigen::Quaterniond::z)
.def("w", (double (Eigen::Quaterniond::) () const) &Eigen::Quaterniond::w)
to
.def("x", (const double &(Eigen::Quaterniond::)() const) &Eigen::Quaterniond::x)
.def("y", (const double &(Eigen::Quaterniond::)() const) &Eigen::Quaterniond::y)
.def("z", (const double &(Eigen::Quaterniond::)() const) &Eigen::Quaterniond::z)
.def("w", (const double &(Eigen::Quaterniond::)() const) &Eigen::Quaterniond::w)

and right before finish, at the same stop it fails

/home/pouya/Desktop/g2opy/EXTERNAL/pybind11/include/pybind11/pybind11.h:65:9: required from ‘pybind11::cpp_function::cpp_function(Func&&, const Extra& ...) [with Func = g2o::declareEigenTypes(pybind11::module&)::<lambda(Eigen::Matrix<double, 3, 1>&, Eigen::Matrix<double, 3, 1>&)>; Extra = {pybind11::name, pybind11::scope, pybind11::sibling}; = void]’
/home/pouya/Desktop/g2opy/EXTERNAL/pybind11/include/pybind11/pybind11.h:1097:22: required from ‘pybind11::class_<type_, options>& pybind11::class_<type_, options>::def_static(const char*, Func&&, const Extra& ...) [with Func = g2o::declareEigenTypes(pybind11::module&)::<lambda(Eigen::Matrix<double, 3, 1>&, Eigen::Matrix<double, 3, 1>&)>; Extra = {}; type_ = Eigen::Quaternion; options = {}]’
/home/pouya/Desktop/g2opy/python/core/eigen_types.h:185:14: required from here
/home/pouya/Desktop/g2opy/EXTERNAL/pybind11/include/pybind11/eigen.h:83:20: warning: implicitly-declared ‘Eigen::Stride<-1, -1>& Eigen::Stride<-1, -1>::operator=(const Eigen::Stride<-1, -1>&)’ is deprecated [-Wdeprecated-copy]
83 | stride = {EigenRowMajor ? rstride : cstride /* outer stride /,
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
84 | EigenRowMajor ? cstride : rstride / inner stride */ };
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /home/pouya/anaconda3/envs/g2opy-env/include/eigen3/Eigen/Core:473,
from /home/pouya/Desktop/g2opy/g2o/core/eigen_types.h:30,
from /home/pouya/Desktop/g2opy/build/g2o/config.h:26,
from /home/pouya/Desktop/g2opy/g2o/core/g2o_core_api.h:13,
from /home/pouya/Desktop/g2opy/g2o/core/hyper_graph.h:40,
from /home/pouya/Desktop/g2opy/python/core/hyper_graph.h:5,
from /home/pouya/Desktop/g2opy/python/g2o.cpp:3:
/home/pouya/anaconda3/envs/g2opy-env/include/eigen3/Eigen/src/Core/Stride.h:71:5: note: because ‘Eigen::Stride<-1, -1>’ has user-provided ‘Eigen::Stride<InnerStrideAtCompileTime, OuterStrideAtCompileTime>::Stride(const Eigen::Stride<InnerStrideAtCompileTime, OuterStrideAtCompileTime>&) [with int _OuterStrideAtCompileTime = -1; int _InnerStrideAtCompileTime = -1]’
71 | Stride(const Stride& other)
| ^~~~~~
make[2]: *** [python/CMakeFiles/g2o.dir/build.make:79: python/CMakeFiles/g2o.dir/g2o.cpp.o] Error 1
make[2]: Leaving directory '/home/pouya/Desktop/g2opy/build'
make[1]: *** [CMakeFiles/Makefile2:1506: python/CMakeFiles/g2o.dir/all] Error 2
make[1]: Leaving directory '/home/pouya/Desktop/g2opy/build'
make: *** [Makefile:136: all] Error 2
(g2opy-env) pouya@mir:~/Desktop/g2opy/build$

[gatlee21]

As some others have pointed out in a previous post, this repo isn't really being maintained. Your best bet is to use g2o-python and follow the instructions listed in: miquelmassot/g2o-python#40.

There is something wrong with the pypi pip installation of g2o-python (it's missing a lot of functions) so make sure to build from source.

I was able to build from source on Ubuntu 20.04. Afterward, I just had to set my LD_LIBRARY_PATH to where the g2o.so's are installed and then I was able to run my script with import g2o.