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见文档 Include What You Use,有一个强制要求是 .cpp对应的头文件 .h必须是第一个被包含的头文件。
JSEnv.Build.cs
里没有指定是否用PCHUsageMode.UseExplicitOrSharedPCHs
,UBT会用当前工程的 XX.Target.cs里的配置,如果XX.Target.CS
里指定了BuildSettingsVersion ≥ V2
的情况下会自动开启IWYU
模式。另外一种可能改法是把
#if UE_5_3_OR_LATER
这个宏去掉,但是不知道会不会引起其他问题。