Update CMakeLists.txt to use MakeAvailable

Author: oursentury

flutter_libs/windows/CMakeLists.txt

@@ -69,20 +69,21 @@ FetchContent_Declare(
     URL https://github.com/objectbox/objectbox-c/releases/download/v${OBJECTBOX_VERSION}/objectbox-windows-${OBJECTBOX_ARCH}.zip
 )
 
-FetchContent_GetProperties(objectbox-download)
-if(NOT objectbox-download_POPULATED)
-  FetchContent_Populate(objectbox-download)
-endif()
+# FIXED: Use MakeAvailable instead of GetProperties/Populate
+# This handles the download and set-up internally and is the modern standard.
+FetchContent_MakeAvailable(objectbox-download)
 
+# We still need the source directory path to point to the library files
+# After MakeAvailable, the directory variable is named <lowercaseName>_SOURCE_DIR
 set(objectbox_flutter_libs_bundled_libraries
     "${objectbox-download_SOURCE_DIR}/lib/${CMAKE_SHARED_LIBRARY_PREFIX}objectbox${CMAKE_SHARED_LIBRARY_SUFFIX}"
     PARENT_SCOPE
 )
 
 add_library(objectbox SHARED IMPORTED GLOBAL)
 set_target_properties(objectbox PROPERTIES
-    IMPORTED_LOCATION ${objectbox-download_SOURCE_DIR}/lib/${CMAKE_SHARED_LIBRARY_PREFIX}objectbox${CMAKE_SHARED_LIBRARY_SUFFIX}
-    IMPORTED_IMPLIB ${objectbox-download_SOURCE_DIR}/lib/${CMAKE_IMPORT_LIBRARY_PREFIX}objectbox${CMAKE_IMPORT_LIBRARY_SUFFIX}
+    IMPORTED_LOCATION "${objectbox-download_SOURCE_DIR}/lib/${CMAKE_SHARED_LIBRARY_PREFIX}objectbox${CMAKE_SHARED_LIBRARY_SUFFIX}"
+    IMPORTED_IMPLIB "${objectbox-download_SOURCE_DIR}/lib/${CMAKE_IMPORT_LIBRARY_PREFIX}objectbox${CMAKE_IMPORT_LIBRARY_SUFFIX}"
 )
 
-target_link_libraries(${PLUGIN_NAME} PRIVATE objectbox)
+target_link_libraries(${PLUGIN_NAME} PRIVATE objectbox)