具有默认功能的Windows静态库 [英] Windows Static Library with Default Functions

问题描述

我想在Windows中创建一个静态库(.lib)，该库可以在后续构建中用作未定义函数的备份".

I would like to create a static library (.lib) in Windows that can be used in subsequent builds as a "backup" for undefined functions.

例如，假设我有foobar.lib，它具有以下定义:

For instance let's say I have foobar.lib which has definitions for:

FOO
BAR

我还有一些其他程序，它们仅定义FOO并将被构建到必须导出FOO和BAR的DLL中.我希望能够使用foobar.lib在生成的DLL中自动导出BAR的默认定义(并忽略foobar.lib中FOO的定义).

and I have some other program that defines FOO only and is to be built into a DLL that must export FOO and BAR. I want to be able to use foobar.lib to automatically export the default definition of BAR in the resulting DLL (and ignore the definition of FOO in foobar.lib).

我尝试将foobar.lib发送到链接器，但是遇到了多个定义的符号错误(/FORCE应该重写该错误，但强烈警告说它可能无法按预期工作).我还尝试使用/NODEFAULTLIB:foobar.lib，但随后它会完全忽略该库，并说BAR未定义.

I have tried sending foobar.lib to the linker but I get a multiple defined symbols error (/FORCE is supposed to override that but with strong warnings that it probably won't work as expected). I've also tried using /NODEFAULTLIB:foobar.lib but then it completely ignores the library and says BAR is undefined.

我几乎100％肯定有一种方法可以执行此操作，因为我使用的是执行此操作的应用程序(Abaqus)，允许用户编写插件，而不必为该插件定义所有必需的导出DLL.而且他们不使用/FORCE选项.

I am almost 100% certain there is a way to do this because I use an application that does this (Abaqus) to allow users to write plug-ins and not have to define all of the required exports for the plug-in DLL. And they do not use the /FORCE option.

推荐答案

我想出了一个解决方案(不确定是唯一的还是最佳的解决方案).

I figured out a solution (not sure if it is the only or best solution).

我试图使用一个目标文件(foobar.obj)在foobar.lib中定义FOO和BAR.如果我将其拆分为foo.obj和bar.obj，然后使用它们创建foobar.lib，则链接程序可以有效地忽略相应的.obj文件.

I was trying to define FOO and BAR in foobar.lib using one object file (foobar.obj). If I split it up into foo.obj and bar.obj and then use those to create foobar.lib the linker can effectively ignore the appropriate .obj files.

因此，简单的答案是:每个对象文件为静态库提供一个功能.

So the short answer is: one function per object file for the static library.

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