尽管增加了链接，但当库发生更改时，Exe仍执行完整链接 [英] Exe performs full link when Library changes, despite incremental linking

问题描述

我有一个MSVC ++项目，由可执行文件，几个自己的静态库和一些预编译的静态第三方库组成.该exe使用增量链接以加快构建时间.

I have an MSVC++ project consisting of an executable, several own static libraries and some precompiled static third party libraries. The exe uses incremental linking in order to speed up build time.

当我在可执行项目中更改.cpp文件时，编译+链接的速度非常快(< 10s).
但是，当我在自己的一个库中更改.cpp文件时，可执行项目似乎正在对其使用的每个库进行 full 链接.
我现在不确定它是否是完整的链接，但是从"vc90.pdb not found"链接器警告中，我可以看出它链接到一些根本没有更改的外部库.

When I change a .cpp file within the executable project, compiling + linking is very quick (<10s).
However, when I change a .cpp file within one of my own libraries, the executable project appears to be doing a full link against every library it uses.
I'm not so sure anymore if it is a full link in fact, but from the "vc90.pdb not found" Linker Warnings, I can tell that it links against some external libraries which have not changed at all.

这是项目结构的示例:

• 预编译的第三方库ExtLib1，ExtLib2和ExtLib3
• 使用第三方库ExtLib1
的自己的库MyLib
• 使用MyLib和ExtLib1-3
自己的Exe MyExe

• Precompiled third party libraries ExtLib1, ExtLib2 and ExtLib3
• Own Library MyLib, using third party lib ExtLib1
• Own Exe MyExe, using MyLib and ExtLib1-3

在MyLib中更改.cpp文件将导致MyExe链接到MyLib，ExtLib1，ExtLib2和ExtLib3，即使 Incremental Linking 是打开.

Changing a .cpp file in MyLib would then lead to MyExe being linked to MyLib, ExtLib1, ExtLib2 and ExtLib3, even if Incremental Linking is turned on.

在我的项目中，完整的链接大约需要5分钟，所以我问:是否有任何方法可以仅重新链接已更改的库?

A full link takes around 5 minutes in my project, so I'm asking: Is there any way to re-link only the changed library?

推荐答案

这是对

This is a introduction to incremental linking. It lists situations that will cause a full link. One of them is "An object that was compiled with the /Yu /Z7 option is changed.", check if your MyLib caught it.

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