First working extract with passing tests. Next to rework this so that the demo is separate from the actual library that people would use.

guecs.hpp

@@ -6,7 +6,6 @@
 #include <memory>
 #include <SFML/Graphics.hpp>
 #include <functional>
-#include "events.hpp"
 #include <any>
 #include <queue>
 #include <typeindex>

meson.build

@@ -78,12 +78,21 @@ dependencies += [
 ]
 
 sources = [
+  'config.cpp',
   'dbc.cpp',
-  'lel.cpp'
+  'guecs.cpp',
+  'lel.cpp',
+  'shaders.cpp',
+  'sound.cpp',
+  'textures.cpp',
 ]
 
 executable('runtests', sources + [
   'tests/lel.cpp',
+  'tests/guecs.cpp',
+  'tests/shaders.cpp',
+  'tests/sound.cpp',
+  'tests/textures.cpp',
   ],
   cpp_args: cpp_args,
   link_args: link_args,