I don’t think any of us have tried the Mac ICC build – actually, none of the developers in shouting distance were even aware ICC was available on macs (although it makes sense in retrospect). I don’t think any Rosetta labs actually have an ICC license; some of us use institutional-type licenses on supercomputers but not locally. Since we don’t run on mac supercomputer clusters, nobody’s tried this before.
This is certainly a fiddle-with-the-scons-files type fix. (Pretty much any build environment we haven’t tried is broken but achievable with some tweaking).
Looking into my copy of tools/build/basic.settings, I see no entry for macos and icc. (I’m surprised it compiled at all.) I would try examining the gcc+macos and icc+linux entries and combining them to see what works. It may take some fiddling…