V8.91 won't compile without C++11 on Ubuntu Linux

[danergo]

I want to use the library without C++11 but it won't compile for me: (Theoretically it should as per documentation @http://easylogging.muflihun.com: "For lower version of C++ (non-C++11), please consider using Easylogging++ v8.91. ")

error: #error This file requires compiler and library support for the ISO C++ 2011 standard. This support is currently experimental, and must be enabled with the -std=c++11 or -std=gnu++11 compiler options.

File structure:

./Main.cpp ./logger/easylogging++.h

Contents of Main.cpp:

include "logger/easylogging++.h"

_INITIALIZE_EASYLOGGINGPP using namespace std;

int main(int argc, char* argv[]) { LINFO << "This is my first log"; return 0; }

../src/logger/easylogging++.h: In function ‘std::string easyloggingpp::internal::threading::getCurrentThreadId()’: ../src/logger/easylogging++.h:691:16: error: ‘std::this_thread’ has not been declared ss << std::this_thread::get_id();

[zheolong]

Me too, v8.91 contains some c++11 code, but can not compile with c++11, sad.

That step succeeded after adding this line to CMakeLists.txt: set(CMAKE_CXX_FLAGS "-std=c++11")