I am attempting to use a static library (.a) for which I also have the header files (no .m files), but when I add the library to my target (without even referencing/importing the library in my project code), I receive the Undefined symbols for architecture armv7 linking error at compile time. The linker is complaining about classes that supposedly no longer exist in the newest version of the library, and may be using cached data? That suspicion could be supported by the finding that if I create a blank project and add the library in the exact same way as I added it to my project, the new project compiles without issue. But on another note, when I grep my file system for the classes/ivars the linker is complaining about, I get matches in my static library file and my xcuserdata workspace folders. So I am wondering if the issue is in my project, the library I am trying to import, or the way in which I am trying to add the library to my project? And also, why do I get linker errors when I am not even importing/calling the library from my code? I am using XCode 4.6.1.
The linking error is as follows:
Undefined symbols for architecture armv7:
"_OBJC_IVAR_$_GenericPopupView.delegateTheme", referenced from:
-[MyListView setDelegateTheme:] in myLib.a(MyListView.o)
-[MyListView tableView:cellForRowAtIndexPath:] in myLib.a(MyListView.o)
"_OBJC_CLASS_$_SampleMarkView", referenced from:
objc-class-ref in myLib.a(MyListView.o)
"_OBJC_CLASS_$_CheckMarkView", referenced from:
objc-class-ref in myLib.a(MyListView.o)
"_OBJC_METACLASS_$_GenericPopupView", referenced from:
_OBJC_METACLASS_$_MyListView in myLib.a(MyListView.o)
"_OBJC_CLASS_$_GenericPopupView", referenced from:
_OBJC_CLASS_$_MyListView in myLib.a(MyListView.o)
ld: symbol(s) not found for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)
I added the library to my target by performing the following steps:
Right-click on my project
Select 'Add Files to "My Project"'
Locate the .a file through the popup Finder window
Verify the library path is in my Target -> Build Settings -> Library Search Paths (automatically added when I complete step 3)
Add the header directory to Target -> Build Settings -> Header Search Paths
Verify that the library is listed in Target -> Build Phases -> Link Binary With Libraries
Verify that the library is compiled for armv7 via file, otool, & lipo (I heard the library may also include armv6s, but I didn't see armv6 when I used the three commands)
$ file myLib.a
myLib.a: Mach-O universal binary with 2 architectures
myLib.a (for architecture armv7): current ar archive random library
myLib.a (for architecture cputype (12) cpusubtype (11)): current ar archive random library
$ otool -L myLib.a
Archive : myLib.a (architecture cputype (12) cpusubtype (11))
…
$ lipo -info myLib.a
Architectures in the fat file: myLib.a are: armv7 (cputype (12) cpusubtype (11))
Here are things I have tried inbetween each compile attempt without any success:
Clean the project with (apple)+shift+k
Clean the build directory (DerivedData) with (apple)+alt+shift+k
Delete all the DerivedData directories from the command line
Remove and re-add the library and its headers to my project
Add the library without the headers
Put the libraries in a project that is a target dependency instead of in my project directly
Note that I am unable to add the library as a Target Dependency in Build Settings; should I be able to?
I am also unable to add the library to the target's Build Scheme (via XCode menu's Product -> Scheme -> Edit Scheme... -> Build -> +)
Check the minimum iOS version via iOS Deployment Target in Build Settings – both my target and the library are iOS 6.0
Removed all target search paths except those required for my project to build without the new library as shown below (most importantly I removed the DerivedData from the linker path); my overall project build settings (not the target's build settings) contains no other search paths
Header Search Paths
$(BUILT_PRODUCTS_DIR)/usr/local/include
$(SRCROOT)/../MyLibDirectory/headers
Library Search Paths
$(inherited)
$(SRCROOT)/../TargetDependencyDirectory
$(SRCROOT)/../openssl/lib
$(SRCROOT)/../MyLibDirectory
Removed all other instances of the library on my machine (old versions)
Set the user-defined build setting USE_HEADERMAP = NO
Install on a newly imaged machine with a fresh project checkout and repeat all of the above steps
Add –ObjC++ to the other linker flags (-ObjC is already a linker flag)
Use armv6s by itself and with armv6 in the Valid Architecture under Build Settings for my target and the target dependencies
Set Build Active Architecture Only to Yes
Switched between adding the library in a project group vs. at the parent project group level
Add an import and instantiation of an object from the library in my project code
Played with the library's different settings for Location under Identity and Type in the Utilities window on the right side of XCode when the library is selected
Add the library to the target's Build Phases -> Link Binary With Libraries via the + then Add Other...
I have already tried the recommended steps in these and other posts (only the last two of these listed have actual instructions):
Xcode referencing old
framework
Xcode referencing old/removed frameworks, causing multiple interface
declarations
Xcode custom framework - No known method error
Undefined symbols for architecture armv7
I have not tried changing all of my files to .mm (I didn't need to for previous versions of this library), but I have a lot of .m files that I think might break if I change them all...
Any help or succestions are greatly appreciated! I'm really having a hard time figuring out why this new version of the library is giving me problems.
I resolved my own problem, or rather, the issue was with the black box of a library that I was including. From the command line performed the following command in a terminal window:
grep SampleMarkView myLib.a
Which resulted in:
Binary File:myLib.a matches
I talked to the person who created the library and they sent me an updated version that didn't cause the problem - I guess they had old references in their code. So at the very least I hope this post provides a list of various things to try if you are having a library referencing problem!
Related
I'm working on a book project and the project is connected by API . I'm working on the book app which has different libraries imported from the various places.
Recently, i cloned the project from bitbucket in Xcode and tried to run it. The result i got i error as follows:
enter image description here
It shows :
ld: in /Users/ishinfoservices/Documents/vadltaldhambooks/Pods/FirebaseAnalytics/Frameworks/FIRAnalyticsConnector.framework/FIRAnalyticsConnector(FIRAnalyticsConnector_a8eeba373b74508311b8b22b8d3202a6.o), building for iOS Simulator, but linking in object file built for iOS, file '/Users/ishinfoservices/Documents/vadltaldhambooks/Pods/FirebaseAnalytics/Frameworks/FIRAnalyticsConnector.framework/FIRAnalyticsConnector' for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Help needed to fix the error, as the project has lots of mixes of old libraries along with .h and .m files, the swift files with wireframes
According to the image I saw that you are trying run the app on the iOS simulator, then you could try to add the arm64 to the Excluded Architectures on the Build Settings section of your project or target, it would be like:
Take in mind that if you use Cocoa Pods is possible that also you should add the arm64 to the Exclude Architectures into the Pods project
After the above, clean, build and run the project on the iOS simulator, is possible that on your physical device you must remove the arm64 from the Exclude Architectures, it could depend on what you use in your project.
On the other hand, you can try the following: Select the project -> Select the target -> Go to the Build Phases -> Expand the Link Binary with libraries and add all pod libraries (remove if they exist in embedded binaries or Remove the old FrameWorks), after that, clean and build the project
I have trouble compiling My app (Xcode app project) when my framework (Xcode framework project) is linked and files are added to the framework (not used in the app).
What I did:
Create folder MyProject
Create Xcode single view project (MyApp project) -> output of this is a folder MyApp inside MyProject folder containing all the data
Create Xcode framework project (MyFramework project) -> output of this is a folder MyFramework inside MyProject folder containing all the data
Create workspace and import both projects into the workspace -> output of this is file .xcworkspace in the folder MyProject
So, after this I have hierarchy:
->MyProject
--->MyApp
--->MyFramework
--->MyWorkspace.xcworkspace
Then in General tab of MyApp project I've added in Embedded Binaries my framework. This linked my framework with my app and when I compiled it my app started fine on the phone.
After that I've added one Objective-C .h/.m pair of classes to the framework, added them to the framework target (compiled sources has .m file, header file is selected as public).
When I try to compile and run the app one more time on the device, I get the error:
Undefined symbols for architecture arm64:
"_OBJC_CLASS_$_UNIRest", referenced from:
objc-class-ref in TMSCommunicationManager.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Go to your Project's Target -> Build Settings, then:
Try Setting your Architectures Setting to: $(ARCHS_STANDARD)
And set "Build Active Architecture" to No
Hope this Helps :-)
Unity 4.6.5 project won't run on iOS simulator and I'm getting runtime error:
dyld: Symbol not found: _OBJC_CLASS_$_CBAnalytics
Referenced from: /Users/diverseconnection/Library/Developer/CoreSimulator/Devices/983BAC55-2713-423B-B5F3-C135ECCC2768/data/Containers/Bundle/Application/D4CAC0C7-E3D6-48F5-B264-E6EB715F9709/trouble.app/trouble
Expected in: flat namespace
in /Users/diverseconnection/Library/Developer/CoreSimulator/Devices/983BAC55-2713-423B-B5F3-C135ECCC2768/data/Containers/Bundle/Application/D4CAC0C7-E3D6-48F5-B264-E6EB715F9709/trouble.app/trouble
(lldb)
Any ideas how to fix it?
Well this error is usually rather broad as there can be number of causes. You can try these fixes
Add the correct libraries in the Link Binary With Libraries section of the Build Phases.
If you want to add a library outside of the default search path you can include the path in the Library Search Paths value in the Build Settings and add -l{library_name_without_lib_and_suffix} (eg. for libz.a use -lz) to the Other Linker Flags section of Build Settings.
You copy files into your project but forgot to check the target to add the files to. To resolve:
Open the Build Phases for the correct target, expand Compile Sources and add the missing .m files.
You include a static library that is built for another architecture like i386, the simulator on your host machine. To resolve:
If you have multiple library files from your libraries vendor to include in the project you need to include the one for the simulator (i386) and the one for the device (armv7 for example).
Optionally, you could create a fat static library that contains both architectures.
Also try this
Remove Build Active Architecture Only (build setting parameter key is 'ONLY_ACTIVE_ARCH') from all of your static libraries' project build settings or overwrite it with 'NO'
For the recent couple of days I have had this compiler error in Xcode every time I've built my project:
ld: warning: ignoring file /.../(Framework Name).framework/(Framework), missing required architecture x86_64 in file /.../(Framework Name).framework/(Framework) (2 slices)
Undefined symbols for architecture x86_64:
"_OBJC_CLASS_$_CLSNAME", referenced from:
objc-class-ref in ViewController.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
I also can't run this code on the iPhone 5 simulator (i386).
The iPhone device I have is outdated and can't run iOS 8. I tried setting the build settings to iOS 7 but I get an error regarding the lack of support for dynamic libraries before iOS 8.
Things to note:
I am using 2 projects, in 2 different workspaces. (one for the library and one for the demo app. Tests of the same code with the unit tests in the library project are successful.)
I used to be able to link the demo project with the library project until I had to do some changes in the library code. After I exported the newer version this error started occurring.
In order to get the library file/folder (.framework) I used the Archive option.
Running lipo -info outputs Architectures in the fat file: lib.a armv7 arm64
I have C++ code in the library project (unlikely to be the issue)
In the library project, I am using another external library I installed with Cocoa Pods (also used to work before changes in the library code)
Solutions I tried:
Changing the Architectures and the Valid Architectures list in Build Settings.
Setting "Build Active Architecture Only" to "No" in Build Settings.
Creating a new project (both for the demo and the library)
Making the library a static library (new project, got the same warning, no error, couldn't #import the files I needed)
I only started working with iOS and Xcode a couple of months ago and I am not super-experienced with everything there yet, so please try to explain everything with as much detail as you can.
Thanks in advance to anyone trying to help :)
Did you add the framework it says is missing? Also, try to delete the Derived Data folder and then clean the project. If that does not work, then turn off Modules in build settings.
I created my own iOS framework by following this tutorial, https://code.google.com/p/ios-static-framework/, which uses a static library template and aggregate target with a custom run script to create a framework.
At first it works fine. After including another library in the framework project creates the error when archive or build for device. I think the problem is with some wrong settings for that library. But I just don't know what to try. I have tried setting some sensible Other Linker Flags from https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man1/ld.1.html , but no luck. Can anyone help please ;(
What steps will reproduce the problem?
Follow the tutorial, but change the Aggregate script architecture from armv6 armv7 to armv7 armv7s. Here is the part of the aggregate target script I changed. Everything else is the same.
if [[ "$SF_SDK_PLATFORM" = "iphoneos" ]]
then
SF_OTHER_PLATFORM=iphonesimulator
SF_ARCHS=i386
else
SF_OTHER_PLATFORM=iphoneos
SF_ARCHS="armv7 armv7s"
fi
Add an external library to the project, here I use libBlocksKit.a.
Build the framework, success.
In another child project. Include my built framework.
Add -ObjC in the app Target > Build Settings > Other Linker Flags
Archive and get error. Building for device (iPhone5) gives error too. But building for simulator seems to work.
What is the error?
This error, basically "ld: warning: directory not found for option ... ld: lto: could not merge in ... symbol multiply defined!".
ld: warning: directory not found for option '-L/Users/hlung/Dropbox/- Notes/stackoverflow/RealFrameworkApp/RealFrameworkApp/External/BlocksKit'
ld: lto: could not merge in /Users/hlung/Library/Developer/Xcode/DerivedData/RealFrameworkTest-evagqzwzyyolhjenkkjbvzibxppf/Build/Products/Debug-iphonesimulator/RealFrameworkTest.framework/RealFrameworkTest(NSObject+BlockObservation.o) because 'Linking globals named 'OBJC_CLASS_$_BKObserver': symbol multiply defined!', using libLTO version 'LLVM version 3.2svn, from Apple Clang 4.2 (build 425.0.28)' for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)
If I archive my child project with only one architecture (like armv7), it works. It shows this error with armv7 armv7s architectures ( $(ARCHS_STANDARD_32_BIT) ).
What version of the product are you using? On what operating system?
OS X 10.8.5, XCode 4.6.3
== Update 1 ==
Posted an issue at the tutorial's code.google.com page Update: 2 weeks no answer.
I found a set of useful suggestions from this answer. Update: Doesn't work
I have created a project so you can run and see for yourself here
Linking against a static library from within a framework can create some interesting challenges... It sounds like you may be linking to BlocksKit from both your framework and your application projects.
You should link in only one of those places. Try removing libBlocksKit.a from the Link Libraries build phase of your framework, but leave it in the other project.
You can do like this:
Click on your project (targets)
Click on Build Settings
Under Library Search Paths, delete the paths
I hope it can help you.