fix: create OpenAL::OpenAL target alias for Linux

- FindOpenAL on Linux creates OPENAL_LIBRARY/OPENAL_INCLUDE_DIR
- But code expects OpenAL::OpenAL target
- Add compatibility layer to create proper target

src/CMakeLists.txt

@@ -14,6 +14,15 @@ if(CMAKE_SYSTEM_NAME STREQUAL "Windows")
     find_package(OpenAL CONFIG REQUIRED)
 else()
     find_package(OpenAL REQUIRED)
+    # Create OpenAL::OpenAL alias if not exists
+    if(NOT TARGET OpenAL::OpenAL AND TARGET OpenAL::AL)
+        add_library(OpenAL::OpenAL ALIAS OpenAL::AL)
+    elseif(NOT TARGET OpenAL::OpenAL AND OPENAL_FOUND)
+        add_library(OpenAL::OpenAL INTERFACE IMPORTED)
+        set_target_properties(OpenAL::OpenAL PROPERTIES
+            INTERFACE_INCLUDE_DIRECTORIES "${OPENAL_INCLUDE_DIR}"
+            INTERFACE_LINK_LIBRARIES "${OPENAL_LIBRARY}")
+    endif()
 endif()
 find_package(ZLIB REQUIRED)
 find_package(PNG REQUIRED)