/usr/include/sofa/component/constraint/ is in libsofa1-dev 1.0~beta4-9.
This file is owned by root:root, with mode 0o755.
..
/usr/include/sofa/component/constraint/AttachConstraint.h
/usr/include/sofa/component/constraint/AttachConstraint.inl
/usr/include/sofa/component/constraint/DistanceConstraint.h
/usr/include/sofa/component/constraint/DistanceConstraint.inl
/usr/include/sofa/component/constraint/FixedConstraint.h
/usr/include/sofa/component/constraint/FixedConstraint.inl
/usr/include/sofa/component/constraint/FixedPlaneConstraint.h
/usr/include/sofa/component/constraint/FixedPlaneConstraint.inl
/usr/include/sofa/component/constraint/HermiteSplineConstraint.h
/usr/include/sofa/component/constraint/HermiteSplineConstraint.inl
/usr/include/sofa/component/constraint/LinearMovementConstraint.h
/usr/include/sofa/component/constraint/LinearMovementConstraint.inl
/usr/include/sofa/component/constraint/LinearSolverConstraintCorrection.h
/usr/include/sofa/component/constraint/LinearSolverConstraintCorrection.inl
/usr/include/sofa/component/constraint/OscillatorConstraint.h
/usr/include/sofa/component/constraint/OscillatorConstraint.inl
/usr/include/sofa/component/constraint/ParabolicConstraint.h
/usr/include/sofa/component/constraint/ParabolicConstraint.inl
/usr/include/sofa/component/constraint/PrecomputedConstraintCorrection.h
/usr/include/sofa/component/constraint/PrecomputedConstraintCorrection.inl
/usr/include/sofa/component/constraint/UncoupledConstraintCorrection.h
/usr/include/sofa/component/constraint/UncoupledConstraintCorrection.inl
/usr/include/sofa/component/constraint/UnilateralInteractionConstraint.h
/usr/include/sofa/component/constraint/UnilateralInteractionConstraint.inl
/usr/include/sofa/component/constraint/initConstraint.h