title: gcc doesn't include c header file json-c
body: <p>On  Macbook, I am making something with json-c(<a href="https://github.com/json-c/json-c" rel="nofollow">https://github.com/json-c/json-c</a>)</p>
  
  <pre><code>gcc a.c
  a.c:1:10: fatal error: 'json.h' file not found
  #include "json.h"
            ^
  1 error generated.`&gt;
  </code></pre>
  
  <p>when I try to compile it,</p>
  
  <p>it prints out error, but I have <code>json.h</code> file in include file.</p>
  
  <pre><code>&gt; cd /usr/local/include/json-c/
  &gt; ls
  arraylist.h            json_config.h          json_tokener.h
  bits.h                 json_inttypes.h        json_util.h
  debug.h                json_object.h          linkhash.h
  json.h                 json_object_iterator.h printbuf.h
  json_c_version.h       json_object_private.h  random_seed.h
  </code></pre>
  
  <p>/usr/include/json-c/json.h is definitely exists</p>