获取Apple clang版本和相应的上游LLVM版本 [英] Get Apple clang version and corresponding upstream LLVM version

问题描述

我想了解我的Macbook中安装了哪个版本的clang Apple，以查看具有c ++ 11和/或c ++ 14功能的功能. 我输入了以下命令:

I want to understand which version of clang Apple installed in my macbook, to see with c++11 and/or c++14 features are available. I typed this command:

clang --version

//----response
Apple LLVM version 7.0.0 (clang-700.1.76)     
Target: x86_64-apple-darwin15.0.0    
Thread model: posix

但是我无法理解(clang-700.1.76)的含义. 如何将这段代码转换为clang版本?

But I am not able to understand what (clang-700.1.76) mean. How can I convert this code to a clang version?

在此站点上，您可以检查clang版本 http://clang.llvm.org/cxx_status.html中可用的c ++功能

This is the site where you could check c++ features available in clang version http://clang.llvm.org/cxx_status.html

推荐答案

编译器的(Apple)版本号几乎没有用，因为您还需要考虑代码是使用libstdc++还是libc++编译的(或任何其他标准库)-以及它们的哪个版本.

The (Apple) version number of the compiler is mostly useless, since you also need to consider whether your code is compiled with libstdc++ or with libc++ (or any other standard library) - and which version of those.

如果要测试语言或库功能，最好检查其他定义的值，例如__cplusplus，__cpp_constexpr，__cpp_variadic_templates等.虽然不是很完美，但是看起来效果更好(如果您想获得可移植性)，根据我的经验，所有主要编译器的支持正在改善.

If you want to test for language or library features, it is better to check other defined values, e.g., __cplusplus, __cpp_constexpr, __cpp_variadic_templates, etc. It is not perfect, but it seems to work better (if you want portability) in my experience and the support from all major compiler is improving.

每个C ++标准版本都为__cplusplus定义了一个值，一些编译器使用中间值来表示我们已经在C ++ 14上启动，但还没有开始".在需要时使用>=进行测试.

Each C++ standard version defines a value for __cplusplus, some compilers use intermediate values to say "we already started on C++14, but we are not there yet". Use >= to test when needed.

其他功能测试宏类似，您可以在

The other feature test macros are similar, you can find the current version at N4440. Not all compilers implement N4440, though.

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