id summary reporter owner description type status milestone component version severity resolution keywords cc 1904 undefined reference to `boost::program_options::options_description::m_default_line_length' anonymous Vladimir Prus "If one uses the boost_program_options, one gets a linker error: undefined reference to `boost::program_options::options_description::m_default_line_length' Cause: boost/program_options/options_description.hpp, line 158 Currently: static const unsigned m_default_line_length; Should be: static const unsigned m_default_line_length = 80; The constant without assigneed value seems to become optimized out by the compiler." Bugs closed To Be Determined program_options Boost 1.35.0 Problem invalid