Command /Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/clang failed with exit code 1

Question

Can't understand how to fix it and why it appears?

    Ld /Users/atencion/Library/Developer/Xcode/DerivedData/Flylista-gcadfttyrgznkmafzaicacwytfey/Build/Products/Debug-iphonesimulator/Flylista.app/Flylista normal i386
    cd "/Users/atencion/Documents/Applications Development/Xcode Projects/Flylista"
    setenv MACOSX_DEPLOYMENT_TARGET 10.6
    setenv PATH "/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
    /Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/clang -arch i386 -isysroot /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk -L/Users/atencion/Library/Developer/Xcode/DerivedData/Flylista-gcadfttyrgznkmafzaicacwytfey/Build/Products/Debug-iphonesimulator -F/Users/atencion/Library/Developer/Xcode/DerivedData/Flylista-gcadfttyrgznkmafzaicacwytfey/Build/Products/Debug-iphonesimulator -filelist /Users/atencion/Library/Developer/Xcode/DerivedData/Flylista-gcadfttyrgznkmafzaicacwytfey/Build/Intermediates/Flylista.build/Debug-iphonesimulator/Flylista.build/Objects-normal/i386/Flylista.LinkFileList -mmacosx-version-min=10.6 -Xlinker -objc_abi_version -Xlinker 2 -fobjc-arc -Xlinker -no_implicit_dylibs -D__IPHONE_OS_VERSION_MIN_REQUIRED=50000 -framework QuartzCore -framework UIKit -framework Foundation -framework CoreGraphics -o /Users/atencion/Library/Developer/Xcode/DerivedData/Flylista-gcadfttyrgznkmafzaicacwytfey/Build/Products/Debug-iphonesimulator/Flylista.app/Flylista

ld: duplicate symbol _OBJC_CLASS_$_FlightsViewController in /Users/atencion/Library/Developer/Xcode/DerivedData/Flylista-gcadfttyrgznkmafzaicacwytfey/Build/Intermediates/Flylista.build/Debug-iphonesimulator/Flylista.build/Objects-normal/i386/FlightViewController.o and /Users/atencion/Library/Developer/Xcode/DerivedData/Flylista-gcadfttyrgznkmafzaicacwytfey/Build/Intermediates/Flylista.build/Debug-iphonesimulator/Flylista.build/Objects-normal/i386/FlightsViewController.o for architecture i386
Command /Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/clang failed with exit code 1

Parasite

Did you try the clean the whole project? – Zeeland

Yes, also removed derived data. – Parasite

Answer 1

The actual error is right there in front of you. It appears that your link phase is failing due to a duplicate symbol: FlightsViewController. You've probably defined this twice, or perhaps you've linked it into a library as well as into your main build.

Hora

@shim: you fix it by not having multiple definitions of the same symbol. – Hora

well I got the same error once when I accidentally included a "viewController.m" instead of "viewController.h". Sometimes A bit of Hurry..accompanies a lot of worry!! – Apparitor

Answer 2

This can also commonly happen when you copy/duplicate classes. Make sure you don't have any constants defined in your duplicated class that may be defined elsewhere, etc.

Alikee

Answer 3

Here is solution

When you are working on an iOS application say iPhone or iPad but you have selected wrongly

"My Mac 64 bit" you will get this error

So select proper application type say

iphone Retina(3.5 inch) device iphone Retina(4 inch) iphone Retina 64 bit

ipad ipad retina

etc then you will not get this error.

Damnify