Compiling IB documents for earlier than iOS 7 is no longer supported

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Prepare build
note: Using new build systemnote: Planning buildnote: Using build description from memory


Build target GPU_SIFT of project GPU_SIFT with configuration Debug

CompileXIB /Users/weiqin/Downloads/sift-gpu-iphone-master/GPU_SIFT/MainWindow.xib (in target: GPU_SIFT)
    cd /Users/weiqin/Downloads/sift-gpu-iphone-master
    export XCODE_DEVELOPER_USR_PATH=/Applications/Xcode.app/Contents/Developer/usr/bin/..
    /Applications/Xcode.app/Contents/Developer/usr/bin/ibtool --errors --warnings --notices --module GPU_SIFT --output-partial-info-plist /Users/weiqin/Library/Developer/Xcode/DerivedData/GPU_SIFT-aksfzmygsijpfxbbdgqhplqgzqjh/Build/Intermediates.noindex/GPU_SIFT.build/Debug-iphonesimulator/GPU_SIFT.build/MainWindow-PartialInfo.plist --auto-activate-custom-fonts --target-device iphone --minimum-deployment-target 8.0 --output-format human-readable-text --compile /Users/weiqin/Library/Developer/Xcode/DerivedData/GPU_SIFT-aksfzmygsijpfxbbdgqhplqgzqjh/Build/Products/Debug-iphonesimulator/GPU_SIFT.app/MainWindow.nib /Users/weiqin/Downloads/sift-gpu-iphone-master/GPU_SIFT/MainWindow.xib

/* com.apple.ibtool.document.warnings */
/Users/weiqin/Downloads/sift-gpu-iphone-master/GPU_SIFT/MainWindow.xib:global: warning: This file is set to build for a version older than the deployment target. Functionality may be limited. [9]
/* com.apple.ibtool.document.errors */
/Users/weiqin/Downloads/sift-gpu-iphone-master/GPU_SIFT/MainWindow.xib:global: error: Compiling IB documents for earlier than iOS 7 is no longer supported. [12]



Build failed    2018/10/25, 10:45    1.0 seconds