Ceres 2.2.0 linker error with shared library and Schur specilizations disabled

[Ky Waegel]

I just started testing the Ceres 2.2.0 build,  and I'm getting linker errors on both Windows and Linux platforms using the CMake flags "-DBUILD_SHARED_LIBS=ON -DSCHUR_SPECIALIZATIONS=ON". Has anyone else run into this?

mold: error: undefined symbol: ceres::internal::PartitionedMatrixView<2, -1, -1>::PartitionedMatrixView(ceres::internal::LinearSolver::Options const&, ceres::internal::BlockSparseMatrix const&)
>>> referenced by fake_bundle_adjustment_jacobian.cc
>>>               internal/ceres/CMakeFiles/ceres_internal.dir/fake_bundle_adjustment_jacobian.cc.o:(ceres::internal::CreateFakeBundleAdjustmentPartitionedJacobian(int, int, int, int, double, std::mersenne_twister_engine<unsigned long, 32ul, 624ul, 397ul, 31ul, 2567483615ul, 11ul, 4294967295ul, 7ul, 2636928640ul, 15ul, 4022730752ul, 18ul, 1812433253ul>&))

-Ky Waegel

[Ky Waegel]

It looks like the problem is here: https://ceres-solver.googlesource.com/ceres-solver/+/refs/heads/master/internal/ceres/fake_bundle_adjustment_jacobian.cc#109

The return type is defined as PartitionedMatrixView<2, Eigen::Dynamic, Eigen::Dynamic>, but I think only fully dynamic types are supported if Schur specializations are disabled. If I change that line (and dependent lines) to  PartitionedMatrixView<Eigen::Dynamic , Eigen::Dynamic, Eigen::Dynamic> the linker succeeds.

-Ky Waegel

[Sameer Agarwal]

oh this is definitely a bug. 

Thank you for flagging it, I will fix it shortly.

Sameer

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[Sameer Agarwal]

should be fixed at head. 

Sameer