Unknown option: "-3" Unix manual page for curl_global_cleanup. (host=minya system=Darwin)
curl_global_cleanup(3)          libcurl Manual          curl_global_cleanup(3)

NAME
       curl_global_cleanup - global libcurl cleanup

SYNOPSIS
       #include <curl/curl.h>

       void curl_global_cleanup(void);

DESCRIPTION
       This function releases resources acquired by curl_global_init(3).

       You  should  call curl_global_cleanup(3) once for each call you make to
       curl_global_init(3), after you are done using libcurl.

       This function is not thread safe. You must not call it when  any  other
       thread  in  the program (i.e. a thread sharing the same memory) is run-
       ning.  This doesn't just mean no other thread that  is  using  libcurl.
       Because  curl_global_cleanup(3) calls functions of other libraries that
       are similarly thread unsafe, it could conflict with  any  other  thread
       that uses these other libraries.

       See  the  description  in libcurl(3) of global environment requirements
       for details of how to use this function.

CAUTION
       curl_global_cleanup(3) does not block waiting for  any  libcurl-created
       threads  to  terminate  (such as threads used for name resolving). If a
       module containing libcurl is dynamically unloaded while libcurl-created
       threads  are still running then your program may crash or other corrup-
       tion may occur. We recommend you do not run  libcurl  from  any  module
       that may be unloaded dynamically. This behavior may be addressed in the
       future.

SEE ALSO
       curl_global_init(3), libcurl(3), libcurl-thread(3),

libcurl 7.54.0                September 20, 2016        curl_global_cleanup(3)