Clean Up CMake Build System

platforms/openal/CMakeLists.txt

@@ -0,0 +1,21 @@
+cmake_minimum_required(VERSION 3.16.0)
+project(reminecraftpe-openal)
+
+# Build
+add_library(reminecraftpe-openal STATIC
+	SoundSystemAL.cpp
+)
+
+# Core
+target_link_libraries(reminecraftpe-openal PUBLIC reminecraftpe-core)
+
+# OpenAL
+if(EMSCRIPTEN)
+    target_link_libraries(reminecraftpe-openal PUBLIC openal)
+else()
+    find_library(OPENAL_LIBRARY NAMES openal REQUIRED)
+    target_link_libraries(reminecraftpe-openal PUBLIC "${OPENAL_LIBRARY}")
+endif()
+
+# Headers
+target_include_directories(reminecraftpe-openal PUBLIC .)