一种解决方案，用于在两个项目中构建DLL的文件相同 [英] Same file used to build DLL in two projects under one solution

问题描述

我有一个特定的类，希望在同一解决方案下的两个DLL项目之间共享.

当前，我将文件复制到两个项目文件夹中，并同时包含#pragma和#ifndef保护.

我想知道是否有更好的解决方案.
两种代码的唯一区别是，它们对

I''ve got this one particular class that I wish to share between two DLL projects under the same solution.

Currently, I copied the file into the two project folders and included both a #pragma once and #ifndef guard.

I was wondering if there is a better solution for it.
The only difference in the both codes is that they both use different #define for the

_declspec(dllexport)

使用不同的#define.

只是为了让您大致了解两者的外观:

.

Just to give you a rough idea what both looks like:

#pragma once
#ifndef ITEM_H

class CItem
{
public:
DLL1_API CItem(void);
DLL1_API ~CItem(void);

DLL1_API int getValue(void) const;
DLL1_API void setValue(int value);

/*
Remaining methods with the similar signatures.
*/
}

#pragma once
#ifndef ITEM_H
class CItem
{
public:
DLL2_API CItem(void);
DLL2_API ~CItem(void);
DLL2_API int getValue(void) const;
DLL2_API void setValue(int value);
/*
Remaining methods with the similar signatures.
*/
}

DLL1_API和DLL2_API当前都设置为

Both DLL1_API and DLL2_API are current set to

_declspec(dllexport)

推荐答案

使用单个源文件，您可以将其添加到每个项目中.然后为每个项目创建一个唯一的标头，您可以将其包含在dll源中，该源将包含您可以在其中使用的任何唯一定义.因此，您可以使用在相应标头中唯一定义的DLL_API来代替DLL1_API或DLL2_API.

Use a single source file which you can add to each project. Then create a unique header for each project that you can include into the dll source which will contain any unique defines that you may use in it. So instead of using DLL1_API or DLL2_API, you would use DLL_API which is uniquely defined in the appropriate header.

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