title: <glad/glad.h>: No such file or directory
body: <p>I'm following <a href="https://learnopengl.com/#!Getting-started/Hello-Window" rel="noreferrer">this tutorial</a> to learn OpenGL, but I'm having trouble compiling since the compiler can't find one of the header files.</p>
  
  <p>This is the file I'm trying to compile:</p>
  
  <pre><code>#include &lt;glad/glad.h&gt;
  #include &lt;GLFW/glfw3.h&gt;
  
  int main() {    
    return 0;
  }
  </code></pre>
  
  <p>To compile, I'm using</p>
  
  <pre><code>$ gcc -o sandbox sandbox.cpp -lGL -lGLU -lglut
  </code></pre>
  
  <p>and I get the following error:</p>
  
  <pre><code>sandbox.cpp:1:23: fatal error: glad/glad.h: No such file or directory
  #include &lt;glad/glad.h&gt;
                     ^
  compilation terminated.
  </code></pre>
  
  <p>I followed the first two sections of <a href="https://en.wikibooks.org/wiki/OpenGL_Programming/Installation/Linux" rel="noreferrer">this wiki
  </a> to install OpenGL and libraries.</p>
  
  <p>I think the problem is either the wrong compile command or a flaw in my OpenGL installation.</p>