/usr/include/trilinos/ is in libtrilinos-optipack-dev 12.10.1-3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/trilinos/Makefile.export.OptiPack
/usr/include/trilinos/OptiPack_Config.h
/usr/include/trilinos/OptiPack_ConfigDefs.hpp
/usr/include/trilinos/OptiPack_DefaultPolyLineSearchPointEvaluator.hpp
/usr/include/trilinos/OptiPack_LineSearchPointEvaluatorBase.hpp
/usr/include/trilinos/OptiPack_NonlinearCG.hpp
/usr/include/trilinos/OptiPack_NonlinearCG_decl.hpp
/usr/include/trilinos/OptiPack_NonlinearCG_def.hpp
/usr/include/trilinos/OptiPack_Types.hpp
/usr/include/trilinos/OptiPack_UnconstrainedOptMeritFunc1D.hpp
/usr/include/trilinos/OptiPack_UnconstrainedOptMeritFunc1D_decl.hpp
/usr/include/trilinos/OptiPack_UnconstrainedOptMeritFunc1D_def.hpp
/usr/include/trilinos/OptiPack_Version.hpp