vs /MT
When it comes to building software applications, one crucial decision that developers must make is which switch to use for _AFXDLL builds: /MD or /MT. These switches determine how the Microsoft Foundation Class (MFC) library is linked to the application, and choosing the right one can greatly impact the performance and stability of the final product. In this article, we will explore the differences between /MD and /MT and help you decide which one is best for your project.
First, let's start by understanding what _AFXDLL builds are. In simple terms, _AFXDLL is a preprocessor directive that allows an application to use the shared version of the MFC library. This means that instead of linking the MFC library directly into the application, it will be loaded dynamically at runtime. This can result in a smaller executable file size, as well as improved memory usage and performance.
Now, let's take a closer look at the two switches: /MD and /MT. /MD stands for "Multithreaded DLL," while /MT stands for "Multithreaded." The main difference between the two is that /MD links the MFC library dynamically, while /MT links it statically. This means that with /MD, the MFC library will be loaded at runtime, while with /MT, it will be included in the final executable file.
So, how do you decide which switch is best for your project? The answer lies in the type of application you are building. If you are developing a small application that will only be used on a single computer, then /MT is the way to go. Since the MFC library will be included in the executable file, there is no need to worry about distributing the library separately. This also means that the application will be self-contained and can be easily shared with others.
On the other hand, if you are building a larger application or one that will be used on multiple computers, then /MD is the better choice. By linking the MFC library dynamically, you can reduce the size of the executable file and improve memory usage. Additionally, if there are any updates or bug fixes to the MFC library, they will be automatically applied to your application without the need for recompiling and redistributing the entire application.
Another factor to consider is the compatibility of your application with other applications or libraries. If you are using third-party libraries that are built with /MT, then it would make sense to use the same switch for your application to avoid any potential conflicts. Similarly, if you are planning to use your application with other MFC-based software, then using /MD would be the safer option.
It's also worth noting that some developers prefer to use /MT for all their projects, regardless of the size or usage. This is because linking the MFC library statically can result in faster startup times and improved overall performance. However, this approach may not be suitable for everyone, and it's essential to carefully consider the specific needs of your project before making a decision.
In conclusion, choosing the best switch for _AFXDLL builds is a crucial decision for any software developer. It can greatly impact the performance and stability of the final product. By understanding the differences between /MD and /MT and considering the specific requirements of your project, you can make an informed decision on which switch to use. Whether you choose to link the MFC library dynamically with /MD or statically with /MT, remember to test and optimize your application to ensure the best results.
