I'm trying to insert C++14 style user-defined literal suffixes into my code:Getting some variant of the following error message with GCC 4.9 (via C::B), MinGW7.1 (via nuwen-distro) and also online at coliru and cpp.sh:Code:# include <iostream> # include <string> int main() { auto str = "hello world"s; }Trying to compile with either of the above doesn't help either. Any suggestions re using such literals v welcome. Thanks.Code:error: unable to find numeric literal operator 'operator""i'| note: use -std=gnu++11 or -fext-numeric-literals to enable more built-in suffixes| ||=== Build failed: 1 error(s), 0 warning(s) (0 minute(s), 0 second(s)) ===|