id summary reporter owner description type status milestone component version severity resolution keywords cc 3244 "XLC warnings about missing ""private"" keyword when extending boost::noncopyable" Ioannis Papadopoulos Anthony Williams "xlc 10.1 throws warnings whenever boost::mutex and boost::recursive_mutex are used because of missing access specifier. Example output: ""/usr/local/include/boost/thread/pthread/mutex.hpp"", line 30.9: 1540-0198 (W) The omitted keyword ""private"" is assumed for base class ""boost::noncopyable""." Patches closed Boost 1.40.0 thread Boost 1.39.0 Problem fixed mutex private noncopyable xlc warning