I'm trying to make a single view application for iOS and tvOS with MobileVLCKit.
I downloaded files from git.
I ran ./buildMobileVLCKit.sh with -f key and got a framework ("MobileVLCKit.framework" folder containing MobileVLCKit binaty and Headers subfolder).
I temporary put the framework into ~/Desktop/FrameworkFolder/
I created new project in XCode, chose "File->Add files" and located the framework.
Added Framework Search Path in Project Options (~/Desktop/FrameworkFolder/, recursive).
Added #import into ViewController.h file.
Added VLCMediaPlayer *vPlayer = [[VLCMediaPlayer alloc] init]; into ViewController.m -> viewDidLoad method.
This is my binary:
imac:~ vlad$ file ~/Desktop/FrameworkFolder/MobileVLCKit.framework/MobileVLCKit
/Users/vlad/Desktop/FrameworkFolder/MobileVLCKit.framework/MobileVLCKit: Mach-O universal binary with 5 architectures
/Users/vlad/Desktop/FrameworkFolder/MobileVLCKit.framework/MobileVLCKit (for architecture armv7): current ar archive random library
/Users/vlad/Desktop/FrameworkFolder/MobileVLCKit.framework/MobileVLCKit (for architecture armv7s): current ar archive random library
/Users/vlad/Desktop/FrameworkFolder/MobileVLCKit.framework/MobileVLCKit (for architecture i386): current ar archive random library
/Users/vlad/Desktop/FrameworkFolder/MobileVLCKit.framework/MobileVLCKit (for architecture x86_64): current ar archive random library
/Users/vlad/Desktop/FrameworkFolder/MobileVLCKit.framework/MobileVLCKit (for architecture arm64): current ar archive random library
When I try to build and run the project I'm getting two types of errors:
If I'm working with AppleTV project:
ld: in /Users/vlad/Desktop/FrameworkFolder/MobileVLCKit.framework/MobileVLCKit(VLCMediaPlayer.o), building for tvOS, but linking in object file built for iOS, for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
If I'm working with iOS project:
Undefined symbols for architecture x86_64:
"_AVAudioSessionCategoryPlayback", referenced from:
_Start in MobileVLCKit(audiounit_ios.o)
_Pause in MobileVLCKit(audiounit_ios.o)
"_AVAudioSessionModeMoviePlayback", referenced from:
_Start in MobileVLCKit(audiounit_ios.o)
_Pause in MobileVLCKit(audiounit_ios.o)
"_AudioComponentFindNext", referenced from:
_Start in MobileVLCKit(audiounit_ios.o)
"_AudioComponentInstanceDispose", referenced from:
_Stop in MobileVLCKit(audiounit_ios.o)
— at the begining, and:
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Showing first 200 notices only
— at the end of output. And 155 critical errors between.
I have tried to use precompilled framework as well, same result.
The questions are:
What am I doing wrong?
How can I solve this issue and successfully
build and run the project(s)?
Thank you for any help!
The reason of ld and clang errors was that the Framework and the Library has been built wrong.
The reason of multiple errors during working with iOS project is that required system frameworks has not been included.
I built the static library using XCode and the issue has been solved!
Related
I've done this before, several years ago with Xcode 5 or 6. Now using Xcode 8 or 9, I seem to be missing someting.
No matter what I've done, when I try to build and link my project, I get the Linker message:
Undefined symbols for architecture arm64:
"_OBJC_CLASS_$_MyClass", referenced from:
objc-class-ref in ViewController.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
This is not a duplicate question. It is not an architecture issue.
None of the other results I've found on S-O or google resolve this issue.
I'm obviously missing some build settings, but cannot figure out which one(s).
Between build attempts I've cleaned the build folder, and deleted DerivedData. Quit and restarted Xcode. Created a new set of projects with a new workspace and walked through the steps outlined below.
I'm writing in objective-C for this project if that matters (I don't think it does)
My question is what did I forget?
What I did --
Create a project for my framework and static library
a) create the project for a cocoa-touch framework - let's call it mySDK which creates mySDK.framework
b) Add a target for a cocoa-touch static library - let's call it SDK which creates libSDK.a
c) optionally build both targets -- they build fine
d) close the project
Create a project for my application - myApp - then close the project
Create a workspace - myWorkspace -- and open the workspace
Drag both project files from #1 mySDK and #2 myApp into the workspace
Build the framework and static library (both build and create the targets successfully)
Add the static library to myApp
a) Select myApp and go to build phases
b) Open Link Binary with Libraries
c) Drag from the library build products libSDK.a into the link binaries pane, set to "Required"
The library now appears in the Frameworks group-area in the myApp
7) Select the myApp project and go to build-settings
Add to Header Search Paths = "$(SRCROOT)/../mySDK/mySDK"
This resolves compile errors in finding the headers
Now I ask, why do I need to do anything else, shouldn't Xcode figure the rest out?
Various solutions or tutorials I've reviewed suggest adding:
Other Linking Flags = -ObjC
Library Search Paths = $(BUILT_PRODUCTS_DIR)
Library Search Paths = "$(SRCROOT)/../mySDK"
Changing Skip Install from YES to NO
Installation Build Product Location = $(BUILT_PRODUCTS_DIR)
I've tried all of these in different combinations.
Once I added the library to myApp I see that the Frameworks/libSDK.a file changes from red to black when I build the library so something in the workspace/project knows I built the library and it sees it.
So why when I try build myApp, do I still see the liner error:
Undefined symbols for architecture arm64:
"_OBJC_CLASS_$_MyClass", referenced from:
objc-class-ref in ViewController.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Nothing I have done seems to clear that error. I am pulling my hair out trying to find a solution.
I have also checked that it is building all the appropriate architectures, confirmed it using 'lipo -info'
Xcode obviously knows about the library, why isn't it linking?
My app also compiled with no problem but would hit an error while linking to the static library. My library was based on C++.
I had 2 problems to fix in my case:
The headers lacked proper extern "C" declarations for C functions in a C++ file.
One .cpp file did not #include its matching header so the extern "C" would be properly applied to the compiled version.
The linker had issues because the compiler used a mangled name for the function due to the mistakes. Later confirmed this by looking in the .a file with a text editor. I found my function with "_Z11" prefixed and "v" suffixed.
There was another clue: the error was reporting the missing function name with an underscore at the front.
Undefined symbols for architecture arm64:
"_myCFunction", referenced from:
SwiftModule.swiftFunction () -> () in MySwiftClass.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
I successfully converted a Unity3D project to act more like a NativeApp (Storyboard's) with a way to switch to Unity.
Now I am trying to integrate Unity3D into a NativeApp. Carefully replicating the Unity3D XCode project within an existing NativeApp. Everything went pretty smooth except for this very frustrating error that makes no sense:
Undefined symbols for architecture armv7:
"UnityKeyboard_GetText(std::string*)", referenced from:
KeyboardOnScreen::getText() const in libiPhone-lib.a(iPhoneKeyboard.o)
ld: symbol(s) not found for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)
An examination of libiPhone-lib.a shows the following:
libiPhone-lib.a: Mach-O universal binary with 2 architectures
libiPhone-lib.a (for architecture armv7): current ar archive random library
libiPhone-lib.a (for architecture i386): current ar archive random library
I have verified that Keyboard.mm is being compiled and it contains the so called undefined reference.
UPDATE:
Basically there was some critical project build settings missing. Most importantly the C++ lib being linked against (std vs gnu) and the run script for Unity projects. I will post a more specific answer in two days.
you must disable C++ 11 support for your unity generated project.
Undefined symbols for architecture i386:
"_OBJC_CLASS_$_PHAppDelegate", referenced from:
objc-class-ref in main.o
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)
All I did is I added the philips hue SDK and I replaced the app delegate files with PHAppDelegate.h and .m. and then I changed main.m to work with the new app delegate files and when I built, I got this error. Any insight?
Reading through your question, it seems you had generated appdelegate files, for example SampleAppDelegate.h and SampleAppDelegate.m. Then you copied in the PHAppDelegate.h and .m from the Sample App of the iOS Hue SDK. You changed the references in main.m, but what you did not do, was add the new PHAppDelegate.m to the compile sources phase in the build phases tab of your project in XCode.
This would produce the linker error you described.
Regarding ahwulf's answer, the Hue iOS SDK contains both simulator and iOS device code, so no problem there.
Could the Phillips SDK have no simulator binary, only ARM, so it only works on a device?
I created a static library with Xcode I have compiled selecting a device.
I added this to my library test project in Xcode 4.6
but I always have 2 errors during the linking...
I followed this tutorial: Static Library iOS Tutorial
if I download the sample code I have the same errors:
ld: warning: ignoring file /Users/Downloads/ICodeBlogStaticLibrarySample/MathTest/Classes/iCodeBlogsMathLibrary/libICodeMathUtils.a, missing required architecture i386 in file /Users/Downloads/ICodeBlogStaticLibrarySample/MathTest/Classes/iCodeBlogsMathLibrary/libICodeMathUtils.a (2 slices)
Undefined symbols for architecture i386:
"_OBJC_CLASS_$_MathFunctions", referenced from:
objc-class-ref in MathTestAppDelegate.o
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)
I had once made a static lirary , I had the same problem .
Solution was to "Run the app on device " not on simulator , it works fine then !!!
Hope this helps...
I followed this step by step tutorial:
Tutorial
in particular I had to add these flags: -ObjC and -all_load
You must have selected iOS simulator while building the project. Select iOS device and it should be fine.
Do read and try to understand the error message, it's a meaningful English phrase.
symbol(s) not found for architecture i386
So there's no compiled code for the i386 architecture in the library. This means that either it's compiled for ARM only (for actual iOS devices, like iPhone or iPad), or for the 64-bit simulator (x86_64). Use otool to find out the architectures present in the library.
I'm trying to include a static library in an iOS project.
I imported the .a file and every .h related but then I'm getting this error :
ld: warning: ignoring file /Users/alexis/Library/Developer/Xcode/DerivedData/PlazappPartnerWorkspace- cdrmloavlcqouugawmtqywiinqne/Build/Products/Debug-iphoneos/libPlazappPartnerLib.a, file was built for archive which is not the architecture being linked (i386)
Undefined symbols for architecture i386:
"_OBJC_CLASS_$_LauncherViewController", referenced from:
objc-class-ref in AppDelegate.o
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)
I guess there's a problem of architecture type but I don't understand why nor how to solve it.
Can someone explain it to me and tell me how to solve it? Thanks!
It seems your library was built to run in the device (arm architecture) and you try to use it in the simulator (i386 architecture). Check your library build settings. They should match with your project build settings.
Or even better, create a fat library for development purposes. lipo command is your friend.
To verify the current architectures present in your library: (in Terminal)
cd <path to library folder> # in you case: /Users/alexis/Library/Developer/Xcode/DerivedData/PlazappPartnerWorkspace- cdrmloavlcqouugawmtqywiinqne/Build/Products/Debug-iphoneos
lipo -info libPlazappPartnerLib.a
The output should look like:
Architectures in the fat file: libPlazappPartnerLib.a are: armv6 armv7
They should match with the target device or simulator you are building for.