building newlib with recent versions of autotools

[Hans-Bernhard Bröker]

Am 11.02.2018 um 06:05 schrieb Daniel Alley:
> I looked through the mailing list archives and noticed that there was a
> series of emails  about this in 2016 which made (what seems like, to an
> uninformed observer), a fairly significant amount of progress towards
> fixing the issue.  But the discussion seems to have abruptly ended without
> much in the way of resolution, and it doesn't appear as though any actions
> were taken.

On my end the effort essentially petered out because it turned out there 
were some serious side effects that broke parts of the build, at least 
for native build Cygwin+Newlib on Cygwin.  I never fully managed to fix 
those, so I gave up on the idea.