[Bug 275030] buildworld fails if obj dir is NFS-mounted [patch]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=275030

--- Comment #6 from Warner Losh <imp@FreeBSD.org> ---
Iirc, copying without -p would not preserve the file's times, which lead to
some dependency breaking. Removing that will break things again. Iirc, there
were other problems fixed that were discovered after the commit... it greatly
surprised me at the time. And it was a series of seventh that lead to the
copying as well that I need to see if I can recall...

Wtf is uarch being set on basename. It's not on any of the systems I checked

So its not all NFS setups that would fail.. this has got to be limited to
systems running some third party backup program...

But if ever there was a file flag to not set, it's uarch.

Do not land this patch.

I'll try to recreate this here.

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