Spurious rebuild of Versions.v.i

[Dan Kegel]

Roland McGrath wrote:
>>Also included are some non-parallel-make-safe constructs.  In general,
>>anything which can cause recursion to a parent directory is unsafe; I
>>just had two subdirectories attempt to recreate Versions.v.i at the
>>same time.  Looks like rtld-csu and rtld-gmon.
> 
> 
> That is redundant but should not be unsafe.  That is, the unnecessary
> rebuilds should produce the correct results.

I just had a look at how Versions.v.i is built, and I guess
it looks safe, but only because that rule was carefully
written... it's a bit unnerving as a newbie to have to trust that...
but then us newbies have to take a lot on faith, don't we?
- Dan