Compiling cocos2d-x via build_native.py returns: 'to_string' was not declared in this scope

Question

I am trying to build a cocos2d-x 3.0 (stable) project for Android via the build_native.py script but it hangs when a class is using the std::to_string (or the std::stoi) function. Building the project under Xcode gives no problem at all, it's just the command line compilation that fails.

I am already importing <string> in all the classes that make use of those functions, but with no success. I also modified the Application.mk file like this:

APP_STL := gnustl_static
APP_CPPFLAGS := -frtti -DCOCOS2D_DEBUG=0 -std=c++11 -Wno-literal-suffix -fsigned-char

adding the -std=c++11 flag to make sure the project is compiled using the C++11 version.

Is there anything else I should do here?

More

Following this thread I decided to include this:

#if CC_TARGET_PLATFORM == CC_PLATFORM_MAC || CC_TARGET_PLATFORM == CC_PLATFORM_IOS || CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID
string to_string(int t) {
    ostringstream os;
    os << t;
    return os.str();
}
#endif

in my headers, since I'm just using to_string with integer inputs. It is not a good solution, but works fine ... but then the compiler hangs when it finds the stoi function, again.

Answer 1

I ended up using this piece of code:

#if CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID
string to_string(int t) {
  ostringstream os;
  os << t;
  return os.str();
}

int stoi(const string myString) {
  return atoi(myString.c_str());
}
#endif

Answer 2

Try using atoi instead of stoi. Altough atoi returns zero on error, but it works with command line compilation

Answer 3

you can do int to str conversion process by using sstream library, its some long but it works :

#include <sstream>
std::stringstream myStringStream ; 
myStringStream << myInteger;
myString = myStringStream.str();