title: Where to get all the C header files located in /usr/include?
body: <p>There are two things you should know</p>
  
  <ol>
  <li>Using Kali Linux</li>
  <li>I am  a noob</li>
  </ol>
  
  <p>Okay getting to the problem. I was using Clion for coding my C projects and everything was fair and well but suddenly I wanted to make GUI apps with C so I google and found GTK to be the best choice. Went to their websites downloaded all the required files installed them also installed the dependencies files everything went well. The strange thing was that the gtk header files were not directly included in the /usr/include instead there was a file "gtk-3.o" which contained the gtk and gdk header files. So curse my noobness i always tried to include the 'gtk-3.o' instead of doing it like this <code>#include &lt;gtk-3.0/gtk/gtk.h&gt;</code> and whenever i did this i got error. Then I did the stupidest thing one could ever think of, I copied ALL the files in the gtk-3.0 folder and pasted them directly into the /usr/include. Now when i include the required files like including gtk.h and after that including gdk.h and after that one other file (forgot the name) i get an error saying only gtk.h can be included directly. I googled this error and found a guy saying that The GTK guys did not want the gtk files to be directly included in /usr/include due to unmet dependencies of some of their header files. A guy commented below that he included the gtk files like through subdirectory and worked fine but now i cannot do this because I have copied the contents of gtk-3.0 in /usr/include. I have completely removed Clion and am thinking of deleting the contents of /usr/include and maybe reinstalling Clion will get the header files back. If this is not going to happen please direct me how to get the header files or a better alternative to this solution if there is. Help would be highly appreciated because i have spent my entire day trying to solve this problem, I am exhausted and want some expert help. Thanks</p>
  
  <p>Note: I have not yet deleted the /usr/include/</p>