cmake: provide an IMPORTED target

cmake/Findugfx.cmake

@@ -7,7 +7,7 @@ if(NOT UGFX_ROOT)
 endif()
 
 # Assemble list of components
-list(APPEND ugfx_COMPONENTS
+list(APPEND ugfx_COMPONENTS_BUILTIN
     gadc
     gaudio
     gdisp
@@ -34,13 +34,15 @@ list(APPEND ugfx_INCLUDE_DIRS
     ${UGFX_ROOT}/src
 )
 
-# Include each component
-foreach(component ${ugfx_COMPONENTS})
+# Include each built-in component
+foreach(component ${ugfx_COMPONENTS_BUILTIN})
     include(${UGFX_ROOT}/src/${component}/${component}.cmake)
 endforeach()
 
-# Include target setup for ease-of-use
-include(${CMAKE_CURRENT_LIST_DIR}/target_setup.cmake)
+# Include each component
+foreach(component ${ugfx_FIND_COMPONENTS})
+	include(${UGFX_ROOT}/${component}/driver.cmake)
+endforeach()
 
 # Remove duplicates from non-cached variables
 list(REMOVE_DUPLICATES ugfx_SOURCES)
@@ -49,3 +51,28 @@ list(REMOVE_DUPLICATES ugfx_INCLUDE_DIRS)
 # Outsource heavy-lifting to cmake
 include(FindPackageHandleStandardArgs)
 find_package_handle_standard_args(ugfx DEFAULT_MSG UGFX_ROOT ugfx_SOURCES ugfx_INCLUDE_DIRS)
+
+# Create the target
+if(NOT TARGET ugfx)
+	add_library(ugfx INTERFACE IMPORTED)
+endif()
+target_include_directories(
+	ugfx
+    INTERFACE
+        ${ugfx_INCLUDE_DIRS}
+)
+target_sources(
+	ugfx
+    INTERFACE
+        ${ugfx_SOURCES}
+)
+target_compile_definitions(
+	ugfx
+    INTERFACE
+        ${ugfx_DEFS}
+)
+target_link_libraries(
+	ugfx
+    INTERFACE
+        ${ugfx_LIBS}
+)

cmake/target_setup.cmake

@@ -1,27 +0,0 @@
-function(ugfx_target_setup TARGET)
-
-    target_include_directories(
-        ${TARGET}
-        PRIVATE
-            ${ugfx_INCLUDE_DIRS}
-    )
-
-    target_sources(
-        ${TARGET}
-        PRIVATE
-            ${ugfx_SOURCES}
-    )
-
-    target_compile_definitions(
-        ${TARGET}
-        PRIVATE
-            ${ugfx_DEFS}
-    )
-
-    target_link_libraries(
-        ${TARGET}
-        PRIVATE
-            ${ugfx_LIBS}
-    )
-
-endfunction()