westonpace commented on pull request #10404:
URL: https://github.com/apache/arrow/pull/10404#issuecomment-871752641


   > I'm a bit lost in the above conversation, but it sounds like what is going 
on here is:
   > 
   >     * the atomic library being missing is the main focus here.  It can be 
achieved via R _but_ the correct way to do it is via the changes in the PR 
mentioned above
   > 
   >     * I need to test out whether the changes in the PR mentioned above 
work to install things on the Pi (_without_ the changes I made, as these are 
supposed to be _instead_ of those not _as well as_ those)
   > 
   >     * so I need to build the Arrow C++ library with the changes suggested 
above by @kou , and all being well, the R package should the install 
successfully without me adding the -latomic flag
   
   I think that is a very good summary.  Yesterday I spent a little bit of time 
trying to setup a docker environment where the -latomic flag is needed but it 
seems that it is less "what software is present" (which docker can control) and 
more "what hardware is present" (which docker doesn't control as much) so I 
wasn't able to produce a "raspberry-pi-like environment" to test in.  A friend 
of mine agreed to mail me a spare Pi that he wasn't using so I can take a look 
a week or so.


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