未在gcc 4.4.5中定义_GLIBCXX_ATOMIC_BUILTINS [英] _GLIBCXX_ATOMIC_BUILTINS not defined in gcc 4.4.5

问题描述

我有一些我正在移植的代码，并且我已经追踪到了错误，遗漏了
的宏_GLIBCXX_ATOMIC_BUILTINS

I have some code that I'm porting and I've tracked down the error to missing the macro _GLIBCXX_ATOMIC_BUILTINS

更高版本的gcc没有定义这个？

Do later versions of gcc not define this?

解决这个问题的正确方法是什么？

What's the proper way to get around this?

推荐答案

在该版本中，您还需要检查某些特定数据类型的原子宏， p>

In that version you will also want to check the atomic macros for some particular data type, so you could do:

#if defined(_GLIBCXX_ATOMIC_BUILTINS_4) && !defined(_GLIBCXX_ATOMIC_BUILTINS)
#define _GLIBCXX_ATOMIC_BUILTINS
#endif

或 p>

or

#if defined(_GLIBCXX_ATOMIC_BUILTINS) || defined(_GLIBCXX_ATOMIC_BUILTINS_4)

宏是：

The macros are:

/* Define if builtin atomic operations for bool are supported on this host. */
#undef _GLIBCXX_ATOMIC_BUILTINS_1

/* Define if builtin atomic operations for short are supported on this host. */
#undef _GLIBCXX_ATOMIC_BUILTINS_2

/* Define if builtin atomic operations for int are supported on this host. */
#undef _GLIBCXX_ATOMIC_BUILTINS_4

/* Define if builtin atomic operations for long long are supported on this
   host. */
#undef _GLIBCXX_ATOMIC_BUILTINS_8

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