title: Header file not found in Eclipse CDT
body: <p>I'm trying to build a project that uses an external library (Casablanca) using Eclipse CDT 8.8.1. on Mac OS.  As expected, the first build run returned "cpprest/http_client.h file not found" errors.  </p>
  
  <p>I then proceeded to add an include path (/Users/me/projects/casablanca/Release/include) by right-clicking on the project, selecting Properties->C/C++ Include Paths and Symbols, Add External Include Path, and moving it up in priority as the first listed folder.</p>
  
  <p>However this did not solve the problem and Eclipse still can't seem to find the headers.  The #include directive is as below:</p>
  
  <pre><code>#include &lt;cpprest/http_client.h&gt;
  </code></pre>
  
  <p>and the added /include directory does have a /cpprest sub-directory, with http_client.h in it.</p>
  
  <p>Any help would be appreciated.</p>