/usr/include/gecode/third-party/boost/config/ is in libgecode-dev 4.4.0-5.
This file is owned by root:root, with mode 0o755.
..
/usr/include/gecode/third-party/boost/config/compiler/
/usr/include/gecode/third-party/boost/config/compiler/borland.hpp
/usr/include/gecode/third-party/boost/config/compiler/clang.hpp
/usr/include/gecode/third-party/boost/config/compiler/codegear.hpp
/usr/include/gecode/third-party/boost/config/compiler/comeau.hpp
/usr/include/gecode/third-party/boost/config/compiler/common_edg.hpp
/usr/include/gecode/third-party/boost/config/compiler/compaq_cxx.hpp
/usr/include/gecode/third-party/boost/config/compiler/digitalmars.hpp
/usr/include/gecode/third-party/boost/config/compiler/gcc.hpp
/usr/include/gecode/third-party/boost/config/compiler/gcc_xml.hpp
/usr/include/gecode/third-party/boost/config/compiler/greenhills.hpp
/usr/include/gecode/third-party/boost/config/compiler/hp_acc.hpp
/usr/include/gecode/third-party/boost/config/compiler/intel.hpp
/usr/include/gecode/third-party/boost/config/compiler/kai.hpp
/usr/include/gecode/third-party/boost/config/compiler/metrowerks.hpp
/usr/include/gecode/third-party/boost/config/compiler/mpw.hpp
/usr/include/gecode/third-party/boost/config/compiler/nvcc.hpp
/usr/include/gecode/third-party/boost/config/compiler/pathscale.hpp
/usr/include/gecode/third-party/boost/config/compiler/pgi.hpp
/usr/include/gecode/third-party/boost/config/compiler/sgi_mipspro.hpp
/usr/include/gecode/third-party/boost/config/compiler/sunpro_cc.hpp
/usr/include/gecode/third-party/boost/config/compiler/vacpp.hpp
/usr/include/gecode/third-party/boost/config/compiler/visualc.hpp
/usr/include/gecode/third-party/boost/config/no_tr1/
/usr/include/gecode/third-party/boost/config/no_tr1/cmath.hpp
/usr/include/gecode/third-party/boost/config/no_tr1/utility.hpp
/usr/include/gecode/third-party/boost/config/platform/
/usr/include/gecode/third-party/boost/config/platform/aix.hpp
/usr/include/gecode/third-party/boost/config/platform/amigaos.hpp
/usr/include/gecode/third-party/boost/config/platform/beos.hpp
/usr/include/gecode/third-party/boost/config/platform/bsd.hpp
/usr/include/gecode/third-party/boost/config/platform/cygwin.hpp
/usr/include/gecode/third-party/boost/config/platform/hpux.hpp
/usr/include/gecode/third-party/boost/config/platform/irix.hpp
/usr/include/gecode/third-party/boost/config/platform/linux.hpp
/usr/include/gecode/third-party/boost/config/platform/macos.hpp
/usr/include/gecode/third-party/boost/config/platform/qnxnto.hpp
/usr/include/gecode/third-party/boost/config/platform/solaris.hpp
/usr/include/gecode/third-party/boost/config/platform/symbian.hpp
/usr/include/gecode/third-party/boost/config/platform/vms.hpp
/usr/include/gecode/third-party/boost/config/platform/vxworks.hpp
/usr/include/gecode/third-party/boost/config/platform/win32.hpp
/usr/include/gecode/third-party/boost/config/posix_features.hpp
/usr/include/gecode/third-party/boost/config/select_compiler_config.hpp
/usr/include/gecode/third-party/boost/config/select_platform_config.hpp
/usr/include/gecode/third-party/boost/config/select_stdlib_config.hpp
/usr/include/gecode/third-party/boost/config/stdlib/
/usr/include/gecode/third-party/boost/config/stdlib/dinkumware.hpp
/usr/include/gecode/third-party/boost/config/stdlib/libcomo.hpp
/usr/include/gecode/third-party/boost/config/stdlib/libcpp.hpp
/usr/include/gecode/third-party/boost/config/stdlib/libstdcpp3.hpp
/usr/include/gecode/third-party/boost/config/stdlib/modena.hpp
/usr/include/gecode/third-party/boost/config/stdlib/msl.hpp
/usr/include/gecode/third-party/boost/config/stdlib/roguewave.hpp
/usr/include/gecode/third-party/boost/config/stdlib/sgi.hpp
/usr/include/gecode/third-party/boost/config/stdlib/stlport.hpp
/usr/include/gecode/third-party/boost/config/stdlib/vacpp.hpp
/usr/include/gecode/third-party/boost/config/suffix.hpp
/usr/include/gecode/third-party/boost/config/user.hpp