/usr/include/ is in coinor-libclp-dev 1.12.0-2.1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/coin/
/usr/include/coin/ClpConstraintLinear.hpp
/usr/include/coin/ClpDualRowSteepest.hpp
/usr/include/coin/CbcOrClpParam.hpp
/usr/include/coin/ClpConstraintQuadratic.hpp
/usr/include/coin/ClpGubMatrix.hpp
/usr/include/coin/ClpPrimalColumnDantzig.hpp
/usr/include/coin/ClpPdcoBase.hpp
/usr/include/coin/ClpSimplexDual.hpp
/usr/include/coin/ClpCholeskyBase.hpp
/usr/include/coin/ClpEventHandler.hpp
/usr/include/coin/ClpMessage.hpp
/usr/include/coin/ClpCholeskyWssmp.hpp
/usr/include/coin/ClpPrimalColumnPivot.hpp
/usr/include/coin/ClpGubDynamicMatrix.hpp
/usr/include/coin/ClpNonLinearCost.hpp
/usr/include/coin/ClpPrimalColumnSteepest.hpp
/usr/include/coin/ClpInterior.hpp
/usr/include/coin/ClpDummyMatrix.hpp
/usr/include/coin/config_clp.h
/usr/include/coin/ClpFactorization.hpp
/usr/include/coin/ClpSolve.hpp
/usr/include/coin/ClpNetworkMatrix.hpp
/usr/include/coin/ClpSimplex.hpp
/usr/include/coin/ClpDynamicMatrix.hpp
/usr/include/coin/ClpConfig.h
/usr/include/coin/Idiot.hpp
/usr/include/coin/ClpSimplexNonlinear.hpp
/usr/include/coin/ClpPresolve.hpp
/usr/include/coin/Clp_C_Interface.h
/usr/include/coin/ClpLinearObjective.hpp
/usr/include/coin/ClpPlusMinusOneMatrix.hpp
/usr/include/coin/ClpSimplexPrimal.hpp
/usr/include/coin/ClpPackedMatrix.hpp
/usr/include/coin/ClpDynamicExampleMatrix.hpp
/usr/include/coin/ClpCholeskyDense.hpp
/usr/include/coin/ClpDualRowPivot.hpp
/usr/include/coin/ClpParameters.hpp
/usr/include/coin/ClpConstraint.hpp
/usr/include/coin/ClpNode.hpp
/usr/include/coin/ClpDualRowDantzig.hpp
/usr/include/coin/ClpSimplexOther.hpp
/usr/include/coin/ClpObjective.hpp
/usr/include/coin/ClpModel.hpp
/usr/include/coin/ClpMatrixBase.hpp
/usr/include/coin/ClpQuadraticObjective.hpp