class abc{ // (): lld-link: error: undefined symbol: abc::a
    static String a;
    static String b;
  	
   public:

   String getabc(){
      if(a.IsEqual(""))
      return "abc";   
      else
        return a+b;  
   }
   static void setabc(String v1,String v2){
      a=v1;
      b=v2;
   };
};

CONSOLE_APP_MAIN   
{
   abc::setabc("","");
   
}