GTK3 Linux Swift header issues

gtk3-swift-package-issues.scala

/**

I tried to get GTK running with Swift. To run  this, a Linux machine with a working GTK3 
installation is needed (could also work with OSX && brew install gtk+3, however I did not try that); 
i.e. 
`sudo apt-get install libgtk-3-dev`

Initially I tried with GTK but since GTK has dependencies to a lot of other things, I tried something 
simpler, i.e. in this case GDK which has only dependencies to X11.

I'm aware that GTK is a difficult system, and not easy to link against, however I thought I'd share 
these header issues nevertheless.

*/

// First try
module CGTK [system] {
	umbrella header "/usr/include/gtk-3.0/gdk/gdk.h"
	link "gdk-3"
	export *
}

/*
Error:
Cloning Packages/CGTK
Compiling Swift Module 'example' (1 sources)
<module-includes>:1:10: note: in file included from <module-includes>:1:
#include "/usr/include/gtk-3.0/gdk/gdk.h"
         ^
/usr/include/gtk-3.0/gdk/gdk.h:30:10: error: 'gdk/gdkconfig.h' file not found
#include <gdk/gdkconfig.h>
*/

/**
Setting an umbrella directory also failed:
*/

module CGTK [system] {
	umbrella "/usr/include/gtk-3.0/gdk/"
	link "gdk-3"
	export *
}

/*
Cloning Packages/CGTK
Compiling Swift Module 'example' (1 sources)
<module-includes>:1:10: note: in file included from <module-includes>:1:
#include "/usr/include/gtk-3.0/gdk/x11/gdkx11dnd.h"
         ^
/usr/include/gtk-3.0/gdk/x11/gdkx11dnd.h:22:2: error: "Only <gdk/gdkx.h> can be included directly."
#error "Only <gdk/gdkx.h> can be included directly."
*/


/**
I also tried adding X11, just to make sure that this wasn't the issue
*/
module CX11 [system] {
  module Xlib {
	header "/usr/include/X11/Xlib.h"
  }
  module X {
	header "/usr/include/X11/X.h"
  }
  link "X11"
}

module CGTK [system] {
        module gdk [system] {
		umbrella header "/usr/include/gtk-3.0/gdk/gdk.h"
		link "gdk-3"
		export *
        }
	use CX11
}

/**
Same error:
Cloning Packages/CGTK
Compiling Swift Module 'example' (1 sources)
<module-includes>:1:10: note: in file included from <module-includes>:1:
#include "/usr/include/gtk-3.0/gdk/gdk.h"
         ^
/usr/include/gtk-3.0/gdk/gdk.h:30:10: error: 'gdk/gdkconfig.h' file not found
#include <gdk/gdkconfig.h>
*/

/**
gdkconfig is obviously in the folder:

terhechte@terhechte-virtual-machine:~/Desktop/example$ ls -l /usr/include/gtk-3.0/gdk/
total 480
drwxr-xr-x 2 root root  4096 Dez  8 10:48 broadway
drwxr-xr-x 2 root root  4096 Dez  8 10:48 deprecated
-rw-r--r-- 1 root root  2995 Okt 16 11:46 gdkapplaunchcontext.h
-rw-r--r-- 1 root root  1892 Okt 16 11:46 gdk-autocleanup.h
-rw-r--r-- 1 root root  1381 Okt 16 11:46 gdkbroadway.h
-rw-r--r-- 1 root root  3673 Okt 16 11:46 gdkcairo.h
-rw-r--r-- 1 root root   445 Okt 16 11:46 gdkconfig.h
-rw-r--r-- 1 root root  8259 Okt 16 11:46 gdkcursor.h
-rw-r--r-- 1 root root 11047 Okt 16 11:46 gdkdevice.h
-rw-r--r-- 1 root root  1859 Okt 16 11:46 gdkdevicemanager.h
-rw-r--r-- 1 root root  7461 Okt 16 11:46 gdkdisplay.h
-rw-r--r-- 1 root root  2430 Okt 16 11:46 gdkdisplaymanager.h
-rw-r--r-- 1 root root  7124 Okt 16 11:46 gdkdnd.h
-rw-r--r-- 1 root root  5895 Okt 16 11:46 gdkenumtypes.h
-rw-r--r-- 1 root root 45037 Okt 16 11:46 gdkevents.h
-rw-r--r-- 1 root root  4926 Okt 16 11:46 gdkframeclock.h
-rw-r--r-- 1 root root  2018 Okt 16 11:46 gdkframetimings.h
-rw-r--r-- 1 root root  3886 Okt 16 11:46 gdkglcontext.h
-rw-r--r-- 1 root root  2109 Okt 16 11:46 gdk.h
-rw-r--r-- 1 root root  6212 Okt 16 11:46 gdkkeys.h
-rw-r--r-- 1 root root 73184 Okt 16 11:46 gdkkeysyms-compat.h
-rw-r--r-- 1 root root 82512 Okt 16 11:46 gdkkeysyms.h
-rw-r--r-- 1 root root  4766 Okt 16 11:46 gdkmain.h
-rw-r--r-- 1 root root  1766 Okt 16 11:46 gdkmir.h
-rw-r--r-- 1 root root  2394 Okt 16 11:46 gdkpango.h
-rw-r--r-- 1 root root  2064 Okt 16 11:46 gdkpixbuf.h
-rw-r--r-- 1 root root  1494 Okt 16 11:46 gdkprivate.h
-rw-r--r-- 1 root root  3715 Okt 16 11:46 gdkproperty.h
-rw-r--r-- 1 root root  1889 Okt 16 11:46 gdkrectangle.h
-rw-r--r-- 1 root root  2055 Okt 16 11:46 gdkrgba.h
-rw-r--r-- 1 root root  5257 Okt 16 11:46 gdkscreen.h
-rw-r--r-- 1 root root  5660 Okt 16 11:46 gdkselection.h
-rw-r--r-- 1 root root  2307 Okt 16 11:46 gdktestutils.h
-rw-r--r-- 1 root root  4398 Okt 16 11:46 gdkthreads.h
-rw-r--r-- 1 root root 17452 Okt 16 11:46 gdktypes.h
-rw-r--r-- 1 root root 10597 Okt 16 11:46 gdkversionmacros.h
-rw-r--r-- 1 root root  5577 Okt 16 11:46 gdkvisual.h
-rw-r--r-- 1 root root  1416 Okt 16 11:46 gdkwayland.h
-rw-r--r-- 1 root root 45981 Okt 16 11:46 gdkwindow.h
-rw-r--r-- 1 root root  1961 Okt 16 11:46 gdkx.h
drwxr-xr-x 2 root root  4096 Dez  8 10:48 wayland
drwxr-xr-x 2 root root  4096 Dez  8 10:48 x11

*/

I have managed to get it past this first error by installing swift on /usr/lib and using the following module.modulemap

module CGTK [system] {
  module Gdk {
    umbrella "/usr/include/gtk-3.0/gdk/"
  }

  module Glib {
    umbrella "/usr/include/glib-2.0/glib"

}

But then it dies on me, I think that first you need to create a CGlib module, then a CGTK module depending on that first one... I'll keep looking.

Any repos to take a look?