ns3，C++，儘管被用作'typeid'的操作數，但仍會評估帶有副作用的表達式：

Question

發生了一些奇怪的事情：我沒有修改我的ns3 C++代碼的任何部分，並且運行編譯這是錯誤出現：

[ 815/1681] cxx: scratch/initial-scenario.cc -> build/scratch/initial-scenario.cc.1.o 
In file included from ../scratch/initial-scenario.cc:3: 
In file included from ./ns3/core-module.h:18: 
In file included from ./ns3/calendar-scheduler.h:24: 
In file included from ./ns3/scheduler.h:25: 
In file included from ./ns3/object.h:29: 
In file included from ./ns3/object-base.h:23: 
In file included from ./ns3/type-id.h:25: 
In file included from ./ns3/trace-source-accessor.h:24: 
./ns3/callback.h:1244:54: error: expression with side effects will be evaluated despite being used as an operand to 'typeid' [-Werror,-Wpotentially-evaluated-expression] 
         "got=" << Demangle (typeid (*other).name()) << std::endl << 
                ^
./ns3/fatal-error.h:98:32: note: expanded from macro 'NS_FATAL_ERROR' 
     std::cerr << "msg=\"" << msg << "\", ";   \ 
          ^
1 error generated. 

我不明白爲什麼會出現這個錯誤。奇怪的是，我正在兩個不同的目錄中使用兩個類似的代碼，並且兩者都出現錯誤，但我沒有修改任何內容。可能是編譯器的問題？任何建議？

Answer 1

我解決下什麼建議在這裏的問題：https://www.nsnam.org/wiki/Ns-3.24-errata

的問題是有關的Xcode 7.0

的更新