https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65923
Richard Geary <richardg.work at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |richardg.work at gmail dot com --- Comment #2 from Richard Geary <richardg.work at gmail dot com> --- This is still present in g++ 5.3.0, and also affects std::literals::string_literals. The flag -Wno-literal-suffix does not turn it off. Thus -Werror builds will fail, despite the C++ being clean. A workaround is to use 'using namespace std::literals::chrono_literals;' but having a 'using namespace' in a header file is usually considered bad practice. Please can someone fix this?