重新链接使用带有隐式链接的更新共享库的应用程序? [英] relinking applications that use updated shared library with implicit linking?

问题描述

假设我更改了一个共享库并重新编译了它.
我是否必须重新链接所有使用该共享库的主要应用程序(如果我使用带有隐式链接的共享库 - #include "myLib.h")或者当这些应用程序自动完成重新链接负载?

Let's say I changed a shared library and recompiled it.
Do I have to relink all main applications that use that shared lib (in case I'm using that shared library with implicit linking - #include "myLib.h") or relinking is done automatically when those applications load?

推荐答案

只有当 Application库的二进制接口 (ABI) 与以前的版本不兼容 - 如果删除了某些公共函数或更改了它们的签名，如果更改了某些结构的大小，更改了虚函数顺序以及其他一些情况，则可能会发生这种情况.

You have to recompile only if the Application Binary Interface (ABI) of the library is incompatible with previous version - it could happen if some public functions are removed or their signature is changed, if some structures' sizes are changed, virtual functions order is changed and some other cases.

否则你不需要重新链接 - 这是使用 共享库，允许在不分发新版本应用程序的情况下分发它们的新版本.

Otherwise you don't need re-linking - that is one of the main advantages of using shared libraries, allowing to distribute new versions of them without distributing new versions of the applications.

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