xcode报错：Cycle inside *******

xcode报错：Cycle inside *******; building could produce unreliable results. This usually can be resolved by moving the target's Headers build phase before Compile Sources.
Cycle details:

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Cycle inside rtc_extension; building could produce unreliable results. This usually can be resolved by moving the target's Headers build phase before Compile Sources.
Cycle details:
→ Target 'rtc_extension' has copy command from '/Users/xxx/Documents/SourceCode/base_extension/xxx/third_party/mac/xxx_webrtc.framework' to '/Users/xxx/Documents/SourceCode/base_extension/xxx/bin/Release/xxx_webrtc.framework'
○ Target 'rtc_extension' has link command with output '/Users/xxx/Documents/SourceCode/base_extension/xxx/bin/Release/librtc_extension.dylib'
○ Target 'rtc_extension' has copy command from '/Users/xxx/Documents/SourceCode/base_extension/xxx/third_party/mac/TTTRtcSDK.framework' to '/Users/xxx/Documents/SourceCode/base_extension/xxx/bin/Release/TTTRtcSDK.framework'

错误原因：

Xcode 10 默认使用的build system是New build system，与Xcode9不同。

解决办法：

修改build system
在Xcode菜单栏 -> File -> progect Setting，将build system修改为legacy build system，然后clean后编译。