Unknown option: "-3" Unix manual page for CURLINFO_SSL_ENGINES. (host=minya system=Darwin)
CURLINFO_SSL_ENGINES(3)    curl_easy_getinfo options   CURLINFO_SSL_ENGINES(3)

NAME
       CURLINFO_SSL_ENGINES - get an slist of OpenSSL crypto-engines

SYNOPSIS
       #include <curl/curl.h>

       CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_SSL_ENGINES,
                                  struct curl_slist **engine_list);

DESCRIPTION
       Pass the address of a 'struct curl_slist *' to receive a linked-list of
       OpenSSL crypto-engines supported. Note that engines are normally imple-
       mented  in  separate  dynamic  libraries.  Hence  not  all the returned
       engines  may  be  available  at   run-time.   NOTE:   you   must   call
       curl_slist_free_all(3) on the list pointer once you're done with it, as
       libcurl will not free the data for you.

PROTOCOLS
       All TLS based ones.

EXAMPLE
       TODO

AVAILABILITY
       Added in 7.12.3. Available in OpenSSL builds with "engine" support.

RETURN VALUE
       Returns CURLE_OK if the option is supported,  and  CURLE_UNKNOWN_OPTION
       if not.

SEE ALSO
       curl_easy_getinfo(3), curl_easy_setopt(3),

libcurl 7.54.0                 February 03, 2016       CURLINFO_SSL_ENGINES(3)