Swift: Apple Mach-O Linker Error (file too small for architecture x86_64)

Question

I'm creating a weather app which gets information from a web site. Everything was fine the last time I was coding (last night), I was able to compile and run the simulator with no errors. Just today when I launch the same project, without changing anything, I got a "Apple Mach-O Linker Error". Could you all help with this please?

Here's the details of the error:

Ld /Users/Allister/Library/Developer/Xcode/DerivedData/Haze_Meter-dkjjcmjehyitmcbhkcbujnsrhwpu/Build/Products/Debug-iphonesimulator/Haze\ Meter.app/Haze\ Meter normal x86_64
    cd "/Users/Allister/Documents/XCODE/Haze Meter"
    export IPHONEOS_DEPLOYMENT_TARGET=8.3
    export PATH="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Applications/Xcode.app/Contents/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
    /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -arch x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator8.3.sdk -L/Users/Allister/Library/Developer/Xcode/DerivedData/Haze_Meter-dkjjcmjehyitmcbhkcbujnsrhwpu/Build/Products/Debug-iphonesimulator -F/Users/Allister/Library/Developer/Xcode/DerivedData/Haze_Meter-dkjjcmjehyitmcbhkcbujnsrhwpu/Build/Products/Debug-iphonesimulator -filelist /Users/Allister/Library/Developer/Xcode/DerivedData/Haze_Meter-dkjjcmjehyitmcbhkcbujnsrhwpu/Build/Intermediates/Haze\ Meter.build/Debug-iphonesimulator/Haze\ Meter.build/Objects-normal/x86_64/Haze\ Meter.LinkFileList -Xlinker -rpath -Xlinker @executable_path/Frameworks -Xlinker -objc_abi_version -Xlinker 2 -L/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/iphonesimulator -Xlinker -add_ast_path -Xlinker /Users/Allister/Library/Developer/Xcode/DerivedData/Haze_Meter-dkjjcmjehyitmcbhkcbujnsrhwpu/Build/Intermediates/Haze\ Meter.build/Debug-iphonesimulator/Haze\ Meter.build/Objects-normal/x86_64/Haze_Meter.swiftmodule -mios-simulator-version-min=8.3 -Xlinker -dependency_info -Xlinker /Users/Allister/Library/Developer/Xcode/DerivedData/Haze_Meter-dkjjcmjehyitmcbhkcbujnsrhwpu/Build/Intermediates/Haze\ Meter.build/Debug-iphonesimulator/Haze\ Meter.build/Objects-normal/x86_64/Haze\ Meter_dependency_info.dat -o /Users/Allister/Library/Developer/Xcode/DerivedData/Haze_Meter-dkjjcmjehyitmcbhkcbujnsrhwpu/Build/Products/Debug-iphonesimulator/Haze\ Meter.app/Haze\ Meter

and at the bottom:

ld: file too small (length=0) file '/Users/Allister/Library/Developer/Xcode/DerivedData/Haze_Meter-dkjjcmjehyitmcbhkcbujnsrhwpu/Build/Intermediates/Haze Meter.build/Debug-iphonesimulator/Haze Meter.build/Objects-normal/x86_64/ViewController.o' for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

I've checked other "Apple Mach-O Linker Error" on StackOverflow but they seem to be having a different "ld" with mine, albeit the same "clang".

score 101 · Accepted Answer · edited May 23 '17 at 12:32

101

Try a full rebuild / clean. It's possible that the a previous build has been abnormally aborted, leaving the ViewController.o file corrupted or zero-size.

To clean: In Xcode "Product" menu, select "Clean" (shortcut: Cmd+Shift+K)

To rebuild: In Xcode "Product" menu, select "Build" (shortcut: Cmd+B)

If it doesn't work: In Xcode "Product" menu, hold down Option key, and select "Clean Build Folder"

reference from HERE.

edited May 23 '17 at 12:32

Community

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answered May 28 '15 at 05:02

Dharmesh Kheni

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This works! Can I ask though what is the meaning/function of "Rebuild" and "Clean"? – Allister Bah May 28 '15 at 05:17
Multiple clean builds and I still get this error, which is troubling! – Brynjar Sep 19 '16 at 09:41
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@Brynjar, try [deleting Derived Data](http://stackoverflow.com/a/38366801/3435562) – mattliu Oct 03 '16 at 18:04
+1 for "In Xcode "Product" menu, hold down Option key, and select "Clean Build Folder", a normal clean didn't work but this did – Tommy K Feb 07 '17 at 01:23
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Sub-par quality from Apple, IMHO. – Jonny Mar 06 '17 at 06:54
if this happens on react-native project. try to delete pod folder – yernarun Mar 10 '18 at 03:26
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Wasn't aware of "Clean Build Folder", solved the problem for me! – gilm Feb 10 '19 at 09:06

score 8 · Answer 2 · answered Apr 14 '17 at 19:38

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You don't (usually) have to clean, just open the file it mentions and resave it so that xcode thinks it changed. Then you can just do an incremental build (much faster).

answered Apr 14 '17 at 19:38

colinta

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This saves a lot of work. If it doesn't work, change something in the file and rebuild to make it work. – Tieme Aug 10 '17 at 08:52

score 1 · Answer 3 · answered Oct 06 '17 at 21:02

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I had the same problem. It turned out to be that one of my frameworks I added externally could not be found. To fix it I removed the reference to it, re downloaded it, then re added it to my project.

answered Oct 06 '17 at 21:02

Carter Cobb

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score 0 · Answer 4 · answered Nov 02 '17 at 09:17

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For me it was because of a empty UINavigationController stranded in storyboard.

Hope this helps the needy ones.

answered Nov 02 '17 at 09:17

Nikhil Manapure

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score 0 · Answer 5 · answered Sep 26 '18 at 01:35

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in my case.i get this error in a framework which is accessed by cocoapods. i fix this error by run cmd 'pod cache clean' and then clean and rebuild project.

answered Sep 26 '18 at 01:35

joshia jiang

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score 0 · Answer 6 · answered Jul 10 '19 at 13:33

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I had the same issue with AppCode. Invalidate Caches / restart didn't help. Fixed issue by manually deleting Library/Caches/AppCodeXXXX/DerivedData folder.

answered Jul 10 '19 at 13:33

Jakub Sowa

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Swift: Apple Mach-O Linker Error (file too small for architecture x86_64)

6 Answers6