LIB /nologo /MACHINE:[x86,X64] /def/lib[s,t]atlas.defwhich will create the required .lib. For instance:
LIB /nologo /MACHINE:X64 /def/libtatlas.defShould create the threaded ATLAS library libtatlas.lib for 64-bit Windows.
You can see the genesis of this approach in the e-mail thread:
https://sf.net/projects/math-atlas/forums/forum/1026734/topic/5349864