Use dev-libs/boost to provide TR1-compatible functional interface. This USE flag is only needed with GCC earlier than version 4.1, or with other compilares not providing said interface.

Packages describing “boost” as local USE flag

Package “boost” Flag Description
net-libs/wvstreams Use dev-libs/boost to provide TR1-compatible functional interface. This USE flag is only needed with GCC earlier than version 4.1, or with other compilares not providing said interface.
sci-mathematics/eclib Add parallel capabilities using dev-libs/boost.
app-text/podofo Add support for boost
dev-libs/botan Use dev-libs/boost
sci-mathematics/petsc Use boost (dev-libs/boost)
app-i18n/ibus-pinyin Enable support for dev-libs/boost
sci-visualization/paraview Enable the usage of dev-libs/boost
sci-libs/vtk Add support for boost
app-i18n/pyzy Enable support for dev-libs/boost
app-text/poppler Use boost::small_vector for a serious performance gain
virtual/podofo-build Add support for boost
dev-games/ogre Enable boost support
dev-cpp/msgpack-cxx Enable boost support
sci-libs/adolc Use the boost allocator from dev-libs/boost
sci-libs/symengine Add support for boost integers(dev-libs/boost)
app-i18n/ibus-libpinyin Compile against dev-libs/boost libraries
app-office/scribus Enable support for Boost based enhancement
media-sound/vimpc Use boost instead of C++11 libraries

All packages providing a “boost” USE flag (12)