make use of 'target_sources' to cleanup build scripts

fggl/CMakeLists.txt

@@ -2,14 +2,9 @@ configure_file(FgglConfig.h.in FgglConfig.h)
 
 add_library(fggl fggl.cpp
 	ecs/ecs.cpp
-	gfx/window.cpp
-	gfx/renderer.cpp
-	gfx/input.cpp
-	gfx/shader.cpp
-	gfx/ogl.cpp
 	data/model.cpp
 	data/procedural.cpp
-	debug/debug.cpp)
+)
 target_include_directories(fggl PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/../)
 
 # Graphics backend
@@ -18,5 +13,3 @@ target_link_libraries(fggl glfw)
 
 # Debug backend
 add_subdirectory(debug)
-target_link_libraries(fggl imgui)
-

fggl/debug/CMakeLists.txt

 
+target_sources(fggl
+    PRIVATE
+	debug.cpp
+)
 
+target_link_libraries(fggl imgui)

fggl/gfx/CMakeLists.txt

 
+# Sources
+target_sources(fggl
+    PRIVATE
+	window.cpp
+	renderer.cpp
+	input.cpp
+	shader.cpp
+	ogl.cpp
+)
+
 # OpenGL Backend
 find_package( OpenGL REQUIRED )
 include_directories( ${OPENGL_INCLUDE_DIR} )