Carthage在Xcode12编译问题

问题：

使用Xcode12进行carthage更新，运行以下命令

carthage update --platform iOS --no-use-binaries

*** Building scheme "Alamofire iOS" in Alamofire.xcworkspace

编译失败

Build Failed
	Task failed with exit code 1:
	/usr/bin/xcrun lipo -create /Users/gaoqinghua/Library/Caches/org.carthage.CarthageKit/DerivedData/12.0_12A7209/Alamofire/5.2.2/Build/Intermediates.noindex/ArchiveIntermediates/Alamofire\ iOS/IntermediateBuildFilesPath/UninstalledProducts/iphoneos/Alamofire.framework/Alamofire /Users/gaoqinghua/Library/Caches/org.carthage.CarthageKit/DerivedData/12.0_12A7209/Alamofire/5.2.2/Build/Products/Release-iphonesimulator/Alamofire.framework/Alamofire -output /Users/gaoqinghua/xx/xx/digital-manager-ios/Carthage/Build/iOS/Alamofire.framework/Alamofire


This usually indicates that project itself failed to compile. Please check the xcodebuild log for more details: /var/folders/m7/x46zxcqn07q6r05vgjwr9y0w0000gn/T/carthage-xcodebuild.TzT16X.log

解决方案：

在cartfile同级目录中，用记事本新建个文件，叫tmp.xcconfig
内容是

EXCLUDED_ARCHS__EFFECTIVE_PLATFORM_SUFFIX_simulator__NATIVE_ARCH_64_BIT_x86_64=arm64 arm64e armv7 armv7s armv6 armv8\
EXCLUDED_ARCHS=$(inherited) $(EXCLUDED_ARCHS__EFFECTIVE_PLATFORM_SUFFIX_$(EFFECTIVE_PLATFORM_SUFFIX)__NATIVE_ARCH_64_BIT_$(NATIVE_ARCH_64_BIT))}

然后执行

export XCODE_XCCONFIG_FILE=$PWD/tmp.xcconfig

carthage update --platform iOS --no-use-binaries --cache-builds

就能继续编译了。

如果依然某个三方库有问题，再次执行update命令即可。

如果依然有问题，去github看看这个库是不是有自身问题。

原因：

是Carthage使用Xcode12编译会出现重复的架构版本，去掉重复就可以了。