-std default value for GCC4.8.1
c++, c++11, gcc
Solution
Update in 2018: in the newest version of gcc, the default option for `-std` is now `-std=gnu++14`.
From gcc standards 2.2 C++ language
The default, if no C++ language dialect options are given, is -std=gnu++98.
So if you want to enable C++11 features, you have to add the option `-std=c++11` or `-std=gnu++11` (for C++11 with GNU extensions)
Problem
If I don’t specify the `-std` option when compiling my C++ app using GCC4.8.1, does it apply c++11 value by default? I read the words from GCC document, but still not sure of that. My English is not good, so it might be my bad. -fext-numeric-literals (C++ and Objective-C++ only) Accept imaginary, fixed-point, or machine-defined literal number suffixes as GNU extensions. When this option is turned off these suffixes are treated as C++11 user-defined literal numeric suffixes. This is on by default for all pre-C++11 dialects and all GNU dialects: -std=c++98, -std=gnu++98, -std=gnu++11, -std=gnu++1y. This option is off by default for ISO C++11 onwards (-std=c++11, ...).