Properly link flecs library

engine/libs/flecs/examples/c/reflection/basics/src/main.c

@@ -0,0 +1,34 @@
+#include <basics.h>
+#include <stdio.h>
+
+typedef struct {
+    float x, y;
+} Position;
+
+int main(int argc, char *argv[]) {
+    ecs_world_t *ecs = ecs_init_w_args(argc, argv);
+
+    // Register component as usual
+    ECS_COMPONENT(ecs, Position);
+
+    // Add reflection data to component
+    ecs_struct(ecs, {
+        .entity = ecs_id(Position), // Make sure to use existing id
+        .members = {
+            { .name = "x", .type = ecs_id(ecs_f32_t) }, // builtin float type
+            { .name = "y", .type = ecs_id(ecs_f32_t) }
+        }
+    });
+
+    // Create entity with Position as usual
+    ecs_entity_t ent = ecs_new_id(ecs);
+    ecs_set(ecs, ent, Position, {10, 20});
+
+    // Convert position component to flecs expression string
+    const Position *ptr = ecs_get(ecs, ent, Position);
+    char *str = ecs_ptr_to_expr(ecs, ecs_id(Position), ptr);
+    printf("%s\n", str); // {x: 10, y: 20}
+    ecs_os_free(str);
+
+    ecs_fini(ecs);
+}