C / C ++：内置类型各种编译器/平台的尺寸 [英] C/C++: Size of builtin types for various compilers/platforms

问题描述

我在哪里可以得到有关的，比如说， unsigned int类型在 GCC编译尺寸为Mac信息OS X（32和64位）？总的来说，我很想有一个资源我可以去一个编译器/设置/平台/类型，能够查找该类型将有多大。有谁知道这样的事？

Where can I go to get information about the size of, say, unsigned int compiling under gcc for Mac OS X (both 32 and 64 bits)? In general I'd love to have a resource I can go to with a compiler/settings/platform/type and be able to look up how big that type will be. Does anyone know of such a thing?

更新：感谢所有的反应。我希望能有沿静态表而不是某个位置的一片code的线条更东西，我不得不写，每一个机器上运行。

Update: Thanks for all the responses. I was hoping to have something more along the lines of a static table somewhere instead of a piece of code I'd have to write and run on every machine.

推荐答案

如果你不能写一个程序找出来，您应该咨询编译器/平台ABI（应用程序二进制接口）规范。它应该记录的大小，对齐，字节顺序，基本的原始类型等的支持。

If you can't write a program to find out, you should consult the ABI (Application Binary Interface) specification for the compiler/platform. It should document the sizes, alignments, endianness, etc. of the basic primitive types supported.

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