在什么条件下，你会得到未解决的外部符号__declspec（dllimport）？ [英] Under what conditions will you get unresolved external symbol for __declspec(dllimport)?

问题描述

我将应用程序转换为使用.dlls，并且我链接器错误说明

I am converting an application to use .dlls and I'm riddled with linker errors stating

未解决的外部
符号__declspec（dllimport）public：
void __thiscall
Rail :: SetNextrail（Class Rail *）

unersolved external symbol"__declspec(dllimport) public: void __thiscall Rail::SetNextrail(class Rail *)"

这个错误消息的结尾有更多的乱码。为什么会发生这种情况，你如何解决它？ __declspec（dllimport）放置与宏定义为：

There is more gibberish at the end of this error message. Why should this happen and how do you fix it? __declspec(dllimport) is being placed with a macro defined as:

#ifdef LUDOAI_EXPORT
#define DECLSPECAI __declspec(dllexport)
#else
#define DECLSPECAI __declspec(dllimport)
#endif

推荐答案

我相信你需要做的是指定Railsimport library到链接器。使用GUI，它位于项目设置的链接器选项卡的其他库下。

I believe what you need to do is specify the Rails "import library" to the linker. Using the GUI, this is on the linker tab of project settings, under "additional libraries."

导入库是一个.LIB文件，到进口的相应图书馆。在.LIB文件的符号中是无条件跳转到导入表的相应地址进行导入。当你的代码调用一个导入，它真的调用这个存根在导入库，跳转到导入。

The "import library" is a .LIB file which contains symbols that resolve to the imports of the corresponding library. In the symbols from the .LIB file is an unconditional jump to the imports table's corresponding address for the import. When your code calls an import, it really calls this stub in the import library, which jumps to the import.

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