Properly link flecs library

engine/libs/flecs/examples/cpp/reflection/basics_enum/src/main.cpp

@@ -0,0 +1,33 @@
+#include <basics_enum.h>
+#include <iostream>
+
+enum Color {
+    Red,
+    Green,
+    Blue
+};
+
+struct TypeWithEnum {
+    Color color;
+};
+
+int main(int, char *[]) {
+    flecs::world ecs;
+
+    // Register components with reflection data
+    ecs.component<Color>()
+        .constant("Red", Red)
+        .constant("Green", Green)
+        .constant("Blue", Blue);
+
+    ecs.component<TypeWithEnum>()
+        .member<Color>("color");
+
+    // Create entity with Position as usual
+    flecs::entity e = ecs.entity()
+        .set<TypeWithEnum>({Green});
+
+    // Convert position component to flecs expression string
+    const TypeWithEnum *ptr = e.get<TypeWithEnum>();
+    std::cout << ecs.to_expr(ptr).c_str() << "\n"; // {color: Green}
+}