M R Swami Reddy wrote: > Thank you very much for your response. > Btw, here is command line from build-log: Yes, but you should provide complete details about your system and the way you are configuring, otherwise, there is no hope people will help you. In any case, I suggest moving the conversation to gcc-help only: then, if you figure out a specific bug in the libstdc++ implementation, you should file a Bugzilla PR, the libstd++ mailing list is for development activities only. Thanks, Paolo.