I decided to attempt building the native-comp feature branch, since it
seems like it may make it to mainline fairly soon.  When bootstrapping
with

  make NATIVE_FULL_AOT=1 -j 32 bootstrap

I get an error compiling gnus/gnus-icalendar.el.  I've put the log
below.  I've updated the emacs information from my running emacs below
to match the version of the repository from which I built.


In GNU Emacs 28.0.50 (build 1, x86_64-pc-linux-gnu, X toolkit, cairo version 1.16.0)
 of 2021-02-13 built on miko
Repository revision: d3a399dd299bf7e811cf42950d5f8ac67f063b36
Repository branch: native-comp
Windowing system distributor 'The X.Org Foundation', version 11.0.12010000
System Description: Debian GNU/Linux bullseye/sid

Configured using:
 'configure --without-toolkit-scroll-bars --with-x-toolkit=lucid --with-nativecomp'