On Thu, 9 Apr 2015, Hongyi Zhao wrote:

> When I use the `--dns-servers' option with curl, I meet the errors like
> this:
>
> werner@debian:~$ curl --dns-servers 8.8.8.8 http://www.debian.org
> curl: (4) A requested feature, protocol or option was not found built-in in
> this libcurl due to a build-time decision.
>
> Any hints to solve this issue?

There's a pretty good hint in the man page for this option: "This option
requires that libcurl was built with a resolver backend that supports this
operation. The c-ares backend is the only such one."

-- 
  / daniel.haxx.se
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