Properly link flecs library

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

@@ -0,0 +1,43 @@
+#include <nested_struct.h>
+#include <stdio.h>
+
+typedef struct {
+    float x, y;
+} Point;
+
+typedef struct {
+    Point start, stop;
+} Line;
+
+int main(int argc, char *argv[]) {
+    ecs_world_t *ecs = ecs_init_w_args(argc, argv);
+
+    ECS_COMPONENT(ecs, Point);
+    ECS_COMPONENT(ecs, Line);
+
+    ecs_struct(ecs, {
+        .entity = ecs_id(Point),
+        .members = {
+            { .name = "x", .type = ecs_id(ecs_f32_t) },
+            { .name = "y", .type = ecs_id(ecs_f32_t) }
+        }
+    });
+
+    ecs_struct(ecs, {
+        .entity = ecs_id(Line),
+        .members = {
+            { .name = "start", .type = ecs_id(Point) },
+            { .name = "stop", .type = ecs_id(Point) }
+        }
+    });
+
+    ecs_entity_t ent = ecs_new_id(ecs);
+    ecs_set(ecs, ent, Line, {{10, 20}, {30, 40}});
+
+    const Line *ptr = ecs_get(ecs, ent, Line);
+    char *str = ecs_ptr_to_expr(ecs, ecs_id(Line), ptr);
+    printf("%s\n", str); // {start: {x: 10, y: 20}, stop: {x: 30, y: 40}}
+    ecs_os_free(str);
+
+    return ecs_fini(ecs);
+}