Can we assume all chroots follow UsrMove?

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A while back, we made /lib64 a symbolic link to /usr/lib64:

  <https://fedoraproject.org/wiki/Features/UsrMove>

Is it safe to assume that this symbolic link exists in all chroots?
This includes the initial ramdisk, recovery environments, and chroots
for confining services.

If we can assume that, we can tell glibc to stop searching for shared
objects in /lib64 in addition to /usr/lib64.  It will avoid an
additional failing openat system call if the application calls dlopen
with a shared object name that the system cannot find.

Thanks,
Florian
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