Hi, NAMESPACE_TWEAKS is needed on any Glibc-based system but only enabled on Linux-based ones. I sent a patch to fix this:
https://savannah.gnu.org/bugs/?25176 -- Robert Millan The DRM opt-in fallacy: "Your data belongs to us. We will decide when (and how) you may access your data; but nobody's threatening your freedom: we still allow you to remove your data and not access it at all."
