/usr/include/boost/config/compiler/ is in libboost1.46-dev 1.46.1-7ubuntu3.
This file is owned by root:root, with mode 0o755.
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/usr/include/boost/config/compiler/borland.hpp
/usr/include/boost/config/compiler/clang.hpp
/usr/include/boost/config/compiler/codegear.hpp
/usr/include/boost/config/compiler/comeau.hpp
/usr/include/boost/config/compiler/common_edg.hpp
/usr/include/boost/config/compiler/compaq_cxx.hpp
/usr/include/boost/config/compiler/digitalmars.hpp
/usr/include/boost/config/compiler/gcc.hpp
/usr/include/boost/config/compiler/gcc_xml.hpp
/usr/include/boost/config/compiler/greenhills.hpp
/usr/include/boost/config/compiler/hp_acc.hpp
/usr/include/boost/config/compiler/intel.hpp
/usr/include/boost/config/compiler/kai.hpp
/usr/include/boost/config/compiler/metrowerks.hpp
/usr/include/boost/config/compiler/mpw.hpp
/usr/include/boost/config/compiler/nvcc.hpp
/usr/include/boost/config/compiler/pathscale.hpp
/usr/include/boost/config/compiler/pgi.hpp
/usr/include/boost/config/compiler/sgi_mipspro.hpp
/usr/include/boost/config/compiler/sunpro_cc.hpp
/usr/include/boost/config/compiler/vacpp.hpp
/usr/include/boost/config/compiler/visualc.hpp