-/* ========================================================================= */
-/* this should better go into "system.h" or "features.h" (yet to be created) */
-/* ========================================================================= */
+#if defined(__ANDROID__)
+#define PLATFORM_ANDROID
+#undef PLATFORM_STRING
+#define PLATFORM_STRING "Android"
+#endif
+
+#if defined(__EMSCRIPTEN__)
+#define PLATFORM_EMSCRIPTEN
+#undef PLATFORM_STRING
+#define PLATFORM_STRING "Emscripten"
+#endif
+
+
+// ============================================================================
+// define additional platform keywords for CPU architecture
+// ============================================================================