GCC风格的弱链接在Visual Studio？ [英] GCC style weak linking in Visual Studio?

问题描述

GCC有使弱符号链接通过 __属性的能力__（（弱））。我想用一个弱符号，用户可以在自己的应用程序覆盖静态库。一个GCC风格的弱符号愿意让我做，但我不知道它是否可以使用Visual Studio来完成。

GCC has the ability to make a symbol link weakly via __attribute__((weak)). I want to use the a weak symbol in a static library that users can override in their application. A GCC style weak symbol would let me do that, but I don't know if it can be done with visual studio.

是否Visual Studio中提供了类似的功能？

Does Visual Studio offer a similar feature?

推荐答案

MSVC ++有 __ declspec（selectany）占地面积弱符号的部分功能：它可以让​​你定义多个相同的符号与外部的联系，引导编译器选择几个可用的任何一种。不过，我不认为MSVC ++有任何会覆盖弱的象征功能的另一部分：可能性提供替换的定义库中的

MSVC++ has __declspec(selectany) which covers part of the functionality of weak symbols: it allows you to define multiple identical symbols with external linkage, directing the compiler to choose any one of several available. However, I don't think MSVC++ has anything that would cover the other part of weak symbol functionality: the possibility to provide "replaceable" definitions in a library.

这，顺便说一句，让人怀疑是如何的支持标准更换 ::运营商新的和 :: delete操作符函数工作在MSVC ++。

This, BTW, makes one wonder how the support for standard replaceable ::operator new and ::operator delete functions works in MSVC++.

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