id summary reporter owner description type status milestone component version severity resolution keywords cc 10500 gcc-5 is assumed to have variadic templates marc.glisse@… John Maddock When !__GNUC!__ > 4, boost defines BOOST_HAS_VARIADIC_TMPL (and not BOOST_NO_CXX11_VARIADIC_TEMPLATES) without checking any of !__cplusplus, !__GXX_EXPERIMENTAL_CXX0X!__ or !__cpp_variadic_templates. Whatever the default ends up being in gcc-5, -std=c++98 will still be an option, so this needs to be changed. Bugs closed Boost 1.57.0 config Boost 1.56.0 Problem fixed flast@…