Homebrew/homebrew-science — pull request #447 by sxprophet (2013-11-06 13:24:30+00:00)
Title: OpenCV: Enable SSSE3/SSE4/AVX support with clang compiler

Someone had reported corrupted Qt build with SSSE3 enabled on Haswell CPU. I've no Haswell machine so I'm not sure about the how OpenCV goes there.