Hello *,dev-lisp/ecls-15.2.21 does not compiled with USE=cpu_flags_x86_sse. So, I've added the line
=dev-lisp/ecls-15.2.21 cpu_flags_x86_sse to .../profiles/base/package.use.mask. But I still see dns ~ # emerge -pv dev-lisp/ecls[ebuild R ] dev-lisp/ecls-15.2.21:0/15.2.21::gentoo [15.2.21:0/15.2.21::grozin] USE="X emacs libatomic%* threads unicode -debug -gengc -precisegc" CPU_FLAGS_X86="sse*" 0 KiB
Why isn't sse masked? Andrey