Hi, I am trying to track a change in behavior in between gcc 4.4.7 (CentOS/x86_64) and gcc 4.9.2 (fedora/x86_64). The result of a complex computation (floating point involved) is slightly different in between those two. Does anyone knows if there was a major change in floating point computation of std::log, std::pow, std::ceil, std::sqrt or std::exp in between those versions? My input is a raw binary (no ASCII parsing involved anywhere in the code). I've compiled code in debug on both side (only option -g is used nothing else). Sorry if this is very broad, I need pointer to get started. Thanks, -- Mathieu