Well, turns out my build only worked because I did not enable all optional components.
One enabling them (and specifically ARROW_S3), there's an issue getting AWS C++ SDK to install (same issue as in https://github.com/apache/arrow/pull/9285 from today).
Let's see what's that all about...

Elad

On 2021/01/21 15:57:53, Wes McKinney <w...@gmail.com> wrote:
> hi Elad -- I think we'd be interested in having portable aarch64>
> wheels for Linux, see>
> https://issues.apache.org/jira/browse/ARROW-10349. Would you be able>
> to post this information on there to help with the process?>
>
> Thanks>
> Wes>
>
> On Thu, Jan 21, 2021 at 3:21 AM Elad Rosenheim <el...@dynamicyield.com> wrote:>
> >>
> > Hi,>
> >>
> > AWS are touting ~20% lower cost and (potentially) increased performance for their own ARM-based line (cg6<x> instance family) compared to current-gen instances (c5 family).>
> >>
> > Turns out that compiling a Python wheel for PyArrow on Amazon Linux 2 + Graviton is pretty straightforward, here's a gist I've created: https://gist.github.com/eladroz/b9437249a76de2b394d54e646d53ec5e>
> >>
> > My own (very non-comprehensive) test showed essentially similar performance to current-gen Intel, but the price difference alone is interesting and in big data workloads can be significant.>
> >>
> > Hope that helps anyone down the line; I'll probably try to run more benchmarks.>
> >>
> > Elad Rosenheim>
>