/usr/include/sofa/component/odesolver/ is in libsofa1-dev 1.0~beta4-9.
This file is owned by root:root, with mode 0o755.
..
/usr/include/sofa/component/odesolver/CGImplicitSolver.h
/usr/include/sofa/component/odesolver/CentralDifferenceSolver.h
/usr/include/sofa/component/odesolver/DampVelocitySolver.h
/usr/include/sofa/component/odesolver/EulerImplicitSolver.h
/usr/include/sofa/component/odesolver/EulerKaapiSolver.h
/usr/include/sofa/component/odesolver/EulerSolver.h
/usr/include/sofa/component/odesolver/NewmarkImplicitSolver.h
/usr/include/sofa/component/odesolver/OdeSolverImpl.h
/usr/include/sofa/component/odesolver/RungeKutta2Solver.h
/usr/include/sofa/component/odesolver/RungeKutta4Solver.h
/usr/include/sofa/component/odesolver/StaticSolver.h
/usr/include/sofa/component/odesolver/initOdeSolver.h