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Yep, exactly this. And quirks of glibc and friends make fully static compilation likely to produce odd failures, unfortunately.

Glibc does not really support static linking.

Kind of my point — so much software depends on it, it’s difficult to statically link more things.

Musl is a pretty good replacement, I have been using it for years without any troubles.

Admittedly you could put that on the Kubernetes folks, but the same problem doesn't exist with glibc.