more cleanup

Firmware/sdk/CMakeLists.txt

@@ -25,22 +25,8 @@ endif ()
 
 set(CARDBOY_SDK_BACKEND_LIBRARY "${_cardboy_backend_default}" CACHE STRING "Backend implementation library for Cardboy SDK" FORCE)
 
-add_library(cardboy_sdk STATIC
-        src/app_system.cpp
-)
 
-target_include_directories(cardboy_sdk
-        PUBLIC
-        ${CMAKE_CURRENT_SOURCE_DIR}/include
-)
-
-target_compile_features(cardboy_sdk PUBLIC cxx_std_20)
-
-target_link_libraries(cardboy_sdk
-        PUBLIC
-        cardboy_backend_interface
-        ${CARDBOY_SDK_BACKEND_LIBRARY}
-)
+add_subdirectory(core)
 
 add_subdirectory(apps)
 

Firmware/sdk/core/CMakeLists.txt

@@ -0,0 +1,22 @@
+cmake_minimum_required(VERSION 3.16)
+
+add_library(cardboy_sdk STATIC
+        ${CMAKE_CURRENT_SOURCE_DIR}/src/app_system.cpp
+)
+
+set_target_properties(cardboy_sdk PROPERTIES
+        EXPORT_NAME sdk
+)
+
+target_include_directories(cardboy_sdk
+        PUBLIC
+        ${CMAKE_CURRENT_SOURCE_DIR}/include
+)
+
+target_compile_features(cardboy_sdk PUBLIC cxx_std_20)
+
+target_link_libraries(cardboy_sdk
+        PUBLIC
+        cardboy_backend_interface
+        ${CARDBOY_SDK_BACKEND_LIBRARY}
+)