Intel describes libm.lib as a static library, libmmt.lib as a multi-threaded static library (/MT) and libmmds.lib as a multi-threaded static library (/MD) all implementing the LibM Math Library.
But don't you always have to choose either /MT or /MD? Why are there 3 static versions of the library on Windows, rather than just two?
This is for old VC6 that has a a runtime for single threaded application!! but for now you are correct, we don't have it any more!