问一个g++的编译异常

问一个g++的编译错误？
我编译时遇到了如下的错误提示：
In file included from /usr/include/c++/4.4/cstdint:35,
  from iod_init.h:13:
/usr/include/c++/4.4/c++0x_warning.h:31:2: error: 
#error This file requires compiler and library support for the upcoming ISO C++ standard, C++0x. This support is currently experimental, and must be enabled with the -std=c++0x or -std=gnu++0x compiler options.

因为我在源代码中使用了int64_t类型。
查看了一下头问发现：

C/C++ code

** @file include/c++0x_warning.h *  This is a Standard C++ Library header. */#ifndef _CXX0X_WARNING_H#define _CXX0X_WARNING_H 1#ifndef __GXX_EXPERIMENTAL_CXX0X__#error This file requires compiler and library support for the upcoming \ISO C++ standard, C++0x. This support is currently experimental, and must be \enabled with the -std=c++0x or -std=gnu++0x compiler options.#endif#endif

这里出的编译错误。
但是我在头文件中已经

C/C++ code

#define __GXX_EXPERIMENTAL_CXX0X__#include <cstddef>#include <cstdio>#include <cstdlib>#include <cstdint>

请问为什么还是有问题呢？
谢谢！

[解决办法]
setting->compiler and debugger setting --> compiler settings -->other options
填入提示的那个选项试试
[解决办法]
工程上右键，选择build options，在compiler settings里面，有列表，
选择c++0x支持。

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