错误时<string>包括

Question

_gnu_cxx::snprintf has not been declared 

当我包括我的CPP字符串。这个错误是在这一行：

using ::__gnu_cxx::snprintf; 

cstdio是包括顺序如下：

/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.2.sdk/usr/include/c++/4.2.1/string:47, 
/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.2.sdk/usr/include/c++/4.2.1/bits/char_traits.h:46, 
/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.2.sdk/usr/include/c++/4.2.1/bits/stl_algobase.h:70, 
/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.2.sdk/usr/include/c++/4.2.1/iosfwd:45, 
/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.2.sdk/usr/include/c++/4.2.1/iosfwd:45, 

Answer 1

我在我的头加入的#define _GLIBCXX_USE_C99_DYNAMIC 1解决了这个。