On Thu, 21 Apr 2016, Ray Satiro via curl-library wrote:

> I see what you're saying. The easiest way to fix it would be require a symbol
> that is defined only when the feature is available and put that in the header
> of each vtls that is supported, and wrap all the pubkey code.

...

> #define have_curlssl_pinnedpubkey

I think that is not only the easiest way but also the nicest and follows the
style we've used for a few other things already that depend on TLS backend
support.

-- 
  / daniel.haxx.se
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