finally compiling and running, text still needs rework

CMakeLists.txt

@@ -49,7 +49,11 @@ add_subdirectory(third-party/libxm SYSTEM)
 
 
 if(LINUX)
-        set(SYSTEM_SOURCE_FILES src/system/linux/elf.c)
+        set(SYSTEM_SOURCE_FILES
+                src/system/linux/twn_elf.c
+                src/rendering/twn_gl_any_rendering.c
+                src/rendering/twn_gl_15_rendering.c
+                src/rendering/twn_gl_15_gpu_texture.c)
 else()
         set(SYSTEM_SOURCE_FILES)
 endif()
@@ -65,12 +69,17 @@ set(TWN_SOURCE_FILES
         src/twn_context.c include/twn_context.h
         src/twn_audio.c include/twn_audio.h
         src/twn_util.c include/twn_util.h
-        src/twn_rendering.c include/twn_rendering.h
         src/twn_input.c include/twn_input.h
         src/twn_camera.c include/twn_camera.h
-        src/twn_textures.c include/twn_textures.c
         src/twn_game_object.c
 
+        src/twn_textures.c src/twn_textures_c.h
+        src/rendering/twn_rendering.c src/rendering/twn_rendering_c.h
+        src/rendering/twn_sprites.c
+        src/rendering/twn_text.c
+        src/rendering/twn_triangles.c
+        src/rendering/twn_circles.c
+
         # for dynamic load based solution main is compiled in a separate target
         $<$<NOT:$<BOOL:${TWN_FEATURE_DYNLIB_GAME}>>:src/twn_main.c>
 
@@ -199,7 +208,7 @@ function(include_deps target)
         target_include_directories(${target} SYSTEM PRIVATE ${THIRD_PARTY_INCLUDES})
 
         # allow access to headers from any point in source tree
-        target_include_directories(${target} PRIVATE ${TWN_ROOT_DIR})
+        target_include_directories(${target} PRIVATE ${TWN_ROOT_DIR} ${TWN_ROOT_DIR}/include)
 endfunction()
 
 
@@ -308,6 +317,7 @@ give_options(${TWN_TARGET})
 include_deps(${TWN_TARGET})
 link_deps(${TWN_TARGET})
 target_link_libraries(${TWN_TARGET} PUBLIC twn_third_parties)
+target_include_directories(${TWN_TARGET} PRIVATE ${TWN_ROOT_DIR}/src)
 
 # build the testgame if this cmake list is built directly
 if(${CMAKE_PROJECT_NAME} MATCHES townengine)