Creating MSVC++ compatible import libraries

If you configured with -shared, then ATLAS should autocreate both a .dll and a .def file. My understanding is that the Windows tool LIB can then be used to create a MSVC++ compatible import library with commands like:
   LIB /nologo /MACHINE:[x86,X64] /def/lib[s,t]atlas.def
which will create the required .lib. For instance:
   LIB /nologo /MACHINE:X64 /def/libtatlas.def
Should create the threaded ATLAS library libtatlas.lib for 64-bit Windows.

You can see the genesis of this approach in the e-mail thread:

R. Clint Whaley 2016-07-28