id summary reporter owner description type status milestone component version severity resolution keywords cc 3424 cflags don't affect C++ compiler Andrey Semashev Vladimir Prus According to [http://www.boost.org/boost-build2/doc/html/bbv2/overview/builtins/features.html this] page, the cflags should affect both C and C++ compilers. However, that isn't true, cflags are not passed to the C++ compiler, only cxxflags are. Bugs closed Boost 1.41.0 build Boost 1.40.0 Problem fixed