Multi-threaded (/ MT) VS in, multi-threaded debugging (/ MTd), the difference between multi-threaded DLL (/ MD), debugging multi-threaded DLL (/ MDd) of

A language development environment often comes with language libraries, which is the API of the operating system for the packaging, we also call these language runtime library.

For MSVC runtime (CRT), according to the static / dynamic linking, can be divided into static and dynamic version version; in accordance with debug / release, can be divided into debug and release versions; in accordance with the single-threaded / multi-threaded, can be divided into single-threaded version and multi-threaded version (VS but currently has not provided a single-threaded version)

In debug mode, use the debug runtime: multi-threaded debugging (/ MTd), debugging multi-threaded DLL (/ MDd)
in release mode, use the Publish runtime: multi-threaded (/ MT), multi-threaded DLL (/ MD)

D runtime with debug mode, but without the release mode. Commissioning and publishing difference is that the release mode debugging information omitted from the program, is simply to delete the contents for debugging in debug mode, so under normal circumstances, the size of the resulting executable file release mode than the debug mode to the next generation of small

Static links: multi-threaded (/ MT), multi-threaded debugging (/ MTd)
Dynamic Link: Multithreaded DLL (/ MD), multi-thread debugging DLL (/ MDd)

Dynamic Link is D, static link to T. The difference is, statically linked to integrated programs depend on libraries to run the executable file is no longer required runtime executable file is run; dynamically linked program did not depend on runtime integrated into the executable file, libraries need to run the executable file is run. Since statically linked program runtime depends integrated into the executable file, in general, the size of the resulting executable file is larger than the dynamic link generating

These four kinds selected from the runtime located VS project properties - "C / C + ±" Code Generation - "Runtime:

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