[FR] 0>app.h(341,5): Error : 'INTERNAL_EXPERIMENTAL' is not defined, evaluates to 0 [-Werror,-Wundef]

i receiver this error when try build sdk from rider for project ue5, how can i fix it

0>app.h(320,5): Error : 'INTERNAL_EXPERIMENTAL' is not defined, evaluates to 0 [-Werror,-Wundef]
0>#if INTERNAL_EXPERIMENTAL
0> ^
0>app.h(341,5): Error : 'INTERNAL_EXPERIMENTAL' is not defined, evaluates to 0 [-Werror,-Wundef]
0>#if INTERNAL_EXPERIMENTAL
0> ^
0>app.h(353,5): Error : 'INTERNAL_EXPERIMENTAL' is not defined, evaluates to 0 [-Werror,-Wundef]
0>#if INTERNAL_EXPERIMENTAL
0> ^
0>app.h(382,5): Error : 'INTERNAL_EXPERIMENTAL' is not defined, evaluates to 0 [-Werror,-Wundef]
0>#if INTERNAL_EXPERIMENTAL
0> ^

从 Rider 重现 UE5 SDK 构建，并检查 app.h 中报告的条件行 320、341、353 和 382。追踪 INTERNAL_EXPERIMENTAL 的构建配置并确定编译器的预期；完成标准是 SDK 构建在没有反复出现的 -Werror/-Wundef 错误的情况下完成。

由索引模型根据 Issue 内容生成。