When will Gnu C++ support C++11 without explicitly asking for it?

Currently, with g++-4.8.1 you have to compile a file in C++11-mode via

g++ -std=c++11 -o prog.x prog.cpp

Is there a plan when I just can say

g++ -o prog.x prog.cpp

to compile prog.cpp?

Maybe prog.cpp has

• #include <regex>
• thread_local
• class Widget { int member = 5; }
• MyType operator"" myt(const char*, sze_t);
• and so on.

GCC 6.0: https://gcc.gnu.org/gcc-6/changes.html

The default mode for C++ is now -std=gnu++14 instead of -std=gnu++98.