在 Visual Studio 中是否有在 C99 和 C11 C 标准之间切换的选项? [英] Is there any option to switch between C99 and C11 C standards in Visual Studio?

问题描述

我是 Visual Studio 环境的新手，我使用的是 VS2017 Pro.我想用 C 编写简单的程序并使用 c99 和 c11 标准编译.在 Visual Studio 中，我只能找到 C++ 标准的编译器开关.

I am new to Visual Studio Environment and I am using VS2017 Pro. I wanted to write simple program in C and compiled with both c99 and c11 standards. In Visual Studio, I could only find compiler switches for C++ standards only.

我们如何告诉 Visual Studio 环境我们要使用 c99 和 c11 C 标准编译当前代码.

How can we tell visual studio environment that we want to compile current code with c99 and c11 C standards.

推荐答案

Visual C++ 支持的唯一模式"是:/std:c++14 符合 C++14 的模式(默认)，/std:c++17 支持 C++17 的模式，在 VS 2017 (15.6) 中还不是很完整.还有一个 /std:c++latest 模式，在未来的某个时间点将包含 C++20 中的内容.所有这些都应与 /permissive- 结合以提高一致性.

The only 'modes' supported by Visual C++ are: /std:c++14 mode for C++14 conformance (the default), /std:c++17 mode for C++17 support which is not quite complete as of VS 2017 (15.6). There is also a /std:c++latest mode which at some future point will include things in C++20. All of these should be combined with /permissive- for improved conformance.

为了满足 C++11 标准库一致性，Visual C++ 必须支持 C99 标准库，这与支持 C99 语言一致性不是一回事.

To meet C++11 Standard Library conformance, Visual C++ has to support the C99 Standard Library, that's not the same thing as supporting C99 language conformance.

在某些时候，为了满足 C++17 标准库的要求，Visual C++ 将不得不支持 C11 标准库，这与 C11 语言一致性不同.

At some point to meet C++17 Standard Library requirements, Visual C++ will have to support the C11 Standard Library and again that's not the same thing as C11 language conformance.

请参阅 Microsoft 的 C++ 标准一致性 和 C++11/14VS 2013 中的 STL 功能、修复和重大更改

MSVC 帖子中有一个评论线程:Windows 的最佳选择，其中 Visual C++ 项目经理负责解决真正的C11"一致性问题.

There is a comment thread in the post MSVC: The best choice for Windows where a Visual C++ project manager takes on the question of true 'C11' conformance.

奥努尔，

虽然我们首先关注的是 C++ 一致性，但我们关注的是 C 一致性.
我们在 VS 2013 中做了一些关于 C 一致性的工作，虽然我们没有公开它很多.该工作包括:
– C99 _Bool
– C99 复合文字
– C99 指定初始值设定项
– C99 变量声明
我们的 C++ 一致性工作即将结束.最后的项目之一是符合标准的预处理器:C 和 C++ 共享的功能.这预处理器也将标志着我们的 C 一致性推送的开始作为我们 C++98/11/14 一致性工作的结束.

C conformance is on our radar though we’re focusing on C++ conformance first.
We did some work in VS 2013 on C conformance, though we didn’t publicize it a lot. That work included:
– C99 _Bool
– C99 compound literals
– C99 designated initializers
– C99 variable declarations
We’re nearing the end of our C++ conformance work. One of the last items is a conforming preprocessor: a feature shared by C and C++. The preprocessor will mark the beginning of our C conformance push as well as the end of our C++98/11/14 conformance work.

安德鲁

更新: VS 2019 (16.8) 将包括 /std:c11 和 /std:c17 标准开关.请参阅这篇博文.因为 MSVC 编译器不支持可变长度数组 (VLA)，所以它不声明符合 C99.请注意，这些开关启用了 这篇博文.

UPDATE: VS 2019 (16.8) will include /std:c11 and /std:c17 standards switches. See this blog post. Because the MSVC compiler does not support Variable-length Arrays (VLA) it does not claim C99 conformance. Note that these switches enable the new C99 preprocessor covered in this blog post.

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