symbol s not found for architecture i386

Question

When trying to compile with Xcode  I am getting the following error       Ld  Users doronkatz Library Developer Xcode DerivedData iKosher-bphnihrngmqtkqfgievrrumzmyce Build Products Debug-iphonesimulator iKosher app iKosher normal i386     cd  Users doronkatz Sites xCode iKosher     setenv MACOSX DEPLOYMENT TARGET 10 6     setenv PATH   Xcode4 Platforms iPhoneSimulator platform Developer usr bin  Xcode4 usr bin  usr bin  bin  usr sbin  sbin       Xcode4 Platforms iPhoneSimulator platform Developer usr bin gcc-4 2 -arch i386 -isysroot  Xcode4 Platforms iPhoneSimulator platform Developer SDKs iPhoneSimulator4 2 sdk -L Users doronkatz Library Developer Xcode DerivedData iKosher-bphnihrngmqtkqfgievrrumzmyce Build Products Debug-iphonesimulator -L Users doronkatz Sites xCode iKosher -F Users doronkatz Library Developer Xcode DerivedData iKosher-bphnihrngmqtkqfgievrrumzmyce Build Products Debug-iphonesimulator -filelist  Users doronkatz Library Developer Xcode DerivedData iKosher-bphnihrngmqtkqfgievrrumzmyce Build Intermediates iKosher build Debug-iphonesimulator iKosher build Objects-normal i386 iKosher LinkFileList -mmacosx-version-min 10 6 -all load -ObjC -Xlinker -objc abi version -Xlinker 2 -lz -framework Security -framework CFNetwork -framework CoreData -framework Foundation -framework UIKit -framework CoreGraphics -framework QuartzCore -o  Users doronkatz Library Developer Xcode DerivedData iKosher-bphnihrngmqtkqfgievrrumzmyce Build Products Debug-iphonesimulator iKosher app iKosher  Undefined symbols for architecture i386      UTTypeCreatePreferredIdentifierForTag   referenced from          ASIHTTPRequest mimeTypeForFileAtPath   in ASIHTTPRequest o     UTTypeCopyPreferredTagWithClass   referenced from          ASIHTTPRequest mimeTypeForFileAtPath   in ASIHTTPRequest o     kUTTagClassMIMEType   referenced from          ASIHTTPRequest mimeTypeForFileAtPath   in ASIHTTPRequest o     kUTTagClassFilenameExtension   referenced from          ASIHTTPRequest mimeTypeForFileAtPath   in ASIHTTPRequest o     SCNetworkReachabilitySetCallback   referenced from        - Reachability startNotifier  in Reachability o     SCNetworkReachabilityScheduleWithRunLoop   referenced from        - Reachability startNotifier  in Reachability o     SCNetworkReachabilityUnscheduleFromRunLoop   referenced from        - Reachability stopNotifier  in Reachability o     SCNetworkReachabilityCreateWithName   referenced from          Reachability reachabilityWithHostName   in Reachability o     SCNetworkReachabilityCreateWithAddress   referenced from          Reachability reachabilityWithAddress   in Reachability o     SCNetworkReachabilityGetFlags   referenced from        - Reachability currentReachabilityStatus  in Reachability o       - Reachability isReachable  in Reachability o       - Reachability isConnectionRequired  in Reachability o       - Reachability isConnectionOnDemand  in Reachability o       - Reachability isInterventionRequired  in Reachability o       - Reachability isReachableViaWWAN  in Reachability o       - Reachability isReachableViaWiFi  in Reachability o           ld  symbol s  not found for architecture i386 collect2  ld returned 1 exit status     Not sure what it means

User · Answer

The problem is that target membership for the added filed is missing to the app target .So select the file and add the checkmark to the box of target membership

For example if the error shown in a method definition in common.m enter image description here

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Another situation that can cause this problem is if your code calls into C    or is called by C   code   I had a problem with my own  c file s utility function showing up as  symbol not found  when called from Obj-C  The fix was to change the file type  in Xcode 4  use the extended info pane to set the file type to  Objective-C   Source   in Xcode 3  use  Get Info  to change file type to  source cpp objcpp

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I ve been stumped by this one before only to realize I added a data-only  interface and forgot to add the empty  implementation block

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In a C   project using a defined templatized class  while receiving the same error  I selected  cpp file with the defined templatized class in the Project Navigator  then Delete   Remove Reference  Also the associated  h file  while still referenced in the project  needs to have a  include statement to the  cpp as follows    ifndef   CircularBuffer  CircularBufferT    define   CircularBuffer  CircularBufferT        snip       include  CircularBufferT cpp   endif    defined   CircularBuffer  CircularBufferT         If you want to see  a simple project example is on github   This is a little bit of indirection trickery and I don t recall the original source of this workaround

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I had used a CLGeocoder without adding a Core Location Framework  Basically this error can mean multiple things  I hope this helps someone else

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You are using ASIHTTPRequest so you need to setup your project  Read the second part here   https   allseeing-i com ASIHTTPRequest Setup-instructions

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In my case none of the posted solutions worked  I had to delete the project and make a fresh checkout from the SVN server  Lucky me the project was hosted in a version control system  Don t know what I d do otherwise

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I fixed a similar error on my project by changing the Build Settings   Architectures for ALL of my targets   The problem      When I upgraded from Xcode 4 4 to Xcode 4 5  my project still compiled fine on the simulator but did not compile on devices   On devices it threw the error  symbol s  not found for architecture armv7s   along with the misleading  Apple Mach-O Linker Error  and  clang  error  linker command failed with exit code 1  use -v to see invocation     The cause  in my case       My project had multiple targets  and even though the Build Settings   Architectures for the main target was set to include armv7s architecture  the main target depended on another target  listed under Build Phases   Dependencies   and I hadn t thought to reset the Build Settings   Architectures for that other target  and I had to change that to include armv7s      I suppose the simulator and device run on different architectures  and that s why the simulator was OK while the device wasn t

User · Answer

Came across this issue in Xcode 11  fix was changing the Minimum Deployment Target from 10 0 to 11 0  hope this helps someone

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Another reason this could be happening is when you UPGRADE an SDK    If you simply delete the group  and then drag and drop the new folder to project  the  Library Search Path  would have both the SDKs  To solve  simply delete the old SDK path

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Sometimes there are source files which are missing from your target    examine which symbols are missing target- build phases- compile source add the missing source files if they are not listed command b for bliss   You can select the files that seem to be  missing  and check in the right-hand utility bar that their checkboxes are selected for the Target you are building

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This happened to me while trying to copy over the PSPDFKIT demo library into my project  I followed all the instructions in the site   all the suggestions on this page   for some reason it kept on giving the above error  the problem was that if i grepped the message in the error method   it only appeared in the binary  obviously I have no access to the source code b c I have to pay for it    I noticed this in the instruction page though     So I went to the guts of that config file and found this   OTHER LDFLAGS   inherited  -ObjC -fobjc-arc -lz -framework CoreText -framework CoreMedia -framework MediaPlayer -framework AVFoundation -framework ImageIO -framework MediaPlayer -framework MessageUI -framework CoreGraphics -framework Foundation -framework QuartzCore -framework AVFoundation -framework CFNetwork -framework MobileCoreServices -framework SystemConfiguration -weak framework UIKit   Then I went to the sample project provided by the author of the said library   and noticed that the previous flags where copied verbatim to the other linker flags in my build settings   however in my project   they were not    So i simply copied and pasted them into my project s build settings other linker flags and everything worked    take away point  if you are relying on some  xcconfig file on your setup  double check with a sample code source or something and make sure that it has actually been applied   it wasn t applied properly in my case

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Make sure that the missing framework is actually listed under  Target Build Phases Link Binary With Libraries  if not just add it  As mentioned before it usually indicates a missing framework    In my project there were two identical framework listed  when I removed one of them I had this error  because it also removed it form the the  Link Binary With Libraries  list  I added back and the problem disappeared  and I still have two frameworks listed

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If this error appears suddenly  it  means the project is missing some frameworks  Libraries and dependent projects can require frameworks  so if you ve added one recently then that can cause this error   To add frameworks  right click on the project name in the project view  select Add  then select Existing frameworks from the list  Then find the framework with the symbols you re missing   The other thing is if you added any classes in the compiled resources and removed that classes from the project then the error appears  The best thing to do is remove the classes from the compile resources Build settings--  compile sources  which have removed from the project   In my case i have added the admob classes in the project and compiled the project  In a later case i dont want to include admobs in my project  so i deleted the references of the admob classes from my project  When this error occurred i deleted the  m class of my admob from compile resources solved this problem

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Does your project depend on another project  and is that a target in that project set up to be a direct dependency of your main target   If this is the case and the dependency isn t set up  the dependent target may not be getting built for all configurations  i e  the simulator   Just a wild guess

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If you get this sort of thing appearing suddenly  it usually means the project is missing some frameworks it needs  Libraries and dependent projects can require frameworks  so if you ve added one recently then that can cause this error   To add frameworks  right click on the project name in the project view  select Add  then select Existing frameworks    from the list  Then find the framework with the symbols you re missing   As to how you find which frameworks you need  I ve found using google the easiest  though you could probably use the Xcode help search too  Search for one of the symbols  doing your best to work out the unmangled name  e g   SCNetworkReachabilityGetFlags   and then the first documentation link you find at developer apple com is often the right one  You usually don t have to hunt very far  In this case  that s this page   https   developer apple com documentation systemconfiguration scnetworkreachability-g7d  Then at the top of the page  it tells you which framework to use  SystemConfiguration in this case  So add that to the project  and compile again   Then just keep doing this until it works     Edit  I ve never used the simulator  but this is what you do on the device - I assume it s the same

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Thought to add my solution for this  after spending a few hours on the same error     The guys above were correct that the first thing you should check is whether you had missed adding any frameworks  see the steps provided by Pruthvid above   My problem  it turned out  was a compile class missing after I deleted it  and later added it back in again   Check your  Compile Sources  as shown for the reported error classes  Add in any missing classes that you created

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I solved it using the following method  for XCode 4    1  Select the project in the project navigation window which will show project summary on right  2  Select 4th tab build phases  3  Select Link binary with library option  4  Add framework for which you are getting  5  Move the framework from main folder to the frameworks folder  6  Build it again and errors are gone

[objective-c] symbol(s) not found for architecture i386

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