On Mon, 15 Oct 2018, Frank Gevaerts via curl-library wrote:

>> Maybe some autotools change?
>
> Definitely a change there. I downloaded the 7.60.0 release source, which
> works. Running buildconf breaks it. Based on versions in generated files,
> autoconf is 2.69 everywhere, automake was 1.15.1 in 7.60.0 and is 1.16.1
> now, so I suspect something in automake.

Seems totally reasonable. I also can't recall us doing special between those
two versions that would change how distclean works. =(

Unfortunately, this is not the first time an automake upgrade breaks our
build.

-- 
  / daniel.haxx.se
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