title: Error: GTKMM 3.0 compiling error
body: <p>I have this error when compiling my first gtkmm project.</p>
  
  <pre><code>gtkmmgui.cpp:2:10: fatal error: gtkmm-3.0: No such file or directory
  </code></pre>
  
  <p>I also tried this:</p>
  
  <pre><code>g++ gtkmmgui.cpp `pkg-config --cflags --libs gtkmm3.0`
  </code></pre>
  
  <p>but it still doesn't work.</p>
  
  <p>Is this because of wrong #include directory?</p>
  
  <p>Source:</p>
  
  <pre><code>#include &lt;iostream&gt;
  #include &lt;gtkmm-3.0&gt;
  
  int main() {
      Gtk::Main kit(argc, argv);
      Gtk::Window window;
      Gtk::Window::run(window)
      return 0;
  }
  </code></pre>