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.
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)
We have an iOS app which uses MISNAP SDK version (2.3) as part of scanning functionality and it was working fine. Since the recent update came for MiSnap which is of version 3.0 and we wanted to update the library in our said application. We followed the docs and we replaced the necessary libraries and we are stuck with below errors even after multiple tries of resolving it.
"_OBJC_CLASS_$_MiSnapViewController", referenced from: objc-class-ref
in DCVC.o objc-class-ref in CCVC.o ld:
symbol(s) not found for architecture armv7
clang: error: linker
command failed with exit code 1 (use -v to see invocation)
We dug up in internet searching solution for this issue and came along with this post but we did not find any solution for the above error. We also created a sample project with the new version of the SDK and it works well. We doubt that this might be some configuration issue which we are unable to figure even after multiple tries.
Below is the current configuration for our application
Deployment Target - 7.1 and above
Base SDK - latest(9.0)
Build Active architecture only - Yes
Valid architectures - armv7 armv7s arm64
I'm trying to make a single view application for iOS and tvOS with MobileVLCKit.
I downloaded files from git.
I ran ./buildMobileVLCKit.sh with -f key and got a framework ("MobileVLCKit.framework" folder containing MobileVLCKit binaty and Headers subfolder).
I temporary put the framework into ~/Desktop/FrameworkFolder/
I created new project in XCode, chose "File->Add files" and located the framework.
Added Framework Search Path in Project Options (~/Desktop/FrameworkFolder/, recursive).
Added #import into ViewController.h file.
Added VLCMediaPlayer *vPlayer = [[VLCMediaPlayer alloc] init]; into ViewController.m -> viewDidLoad method.
This is my binary:
imac:~ vlad$ 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!
I made my own framework and everything was fine. But when Apple releases 64bit architecture when another project uses 64-bit architecture my framework doesn't want to compile.
When I changed architecture of project just armv7 and armv7s - it complies good but when i changed architecture back to arm64 - it produces error -
(null): "_OBJC_CLASS_$MYFramework", referenced from:
objc-class-ref in RWAppDelegate.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
So I've changed architecture of framework to include arm64, but error in my project still there
Is there another way to support arm64?
I added a screenshot of support architectures of framework
From error description you provided I can see that:
During linking phase for Intel 64bit architecture _OBJC_CLASS_$MYFramework symbol was not found. Which is quite strange as you sure you compiling for arm architecture. Maybe you should revise Makefiles of your framework?
Have a look here Shell you make target IOS7 32bit?
I am new to Xcode.
I am adding some features on the old(iOS 3.2) xcode game project. This code never touched for more than a year until I touched.
It worked fine until I tried to make an .iap file. it ran ok and all my changes didn't make any error.
So I changed target device from iPhone 6.0 Simulator -> iOS Device, and tried archive. Unfortunately it generated bunch of errors:
ld: warning: ignoring file lib/libegn_neutron_http_Release_iphoneos.a, file was built for archive which is not the architecture being linked (armv7): lib/libegn_neutron_http_Release_iphoneos.a
Undefined symbols for architecture armv7:
"_EGN_setPollingInMenu", referenced from:
ExitGamesCreateSession(sLibraryData*) in exitgames.o
"_EGN_Neutron_New", referenced from:
ExitGamesInit(sLibraryData*) in exitgames.o
"_EGN_setServerUrl", referenced from:
ExitGamesCreateSession(sLibraryData*) in exitgames.o
......similar 34 errors continued
"_EGN_NeutronCls_Release", referenced from:
ExitGamesShutDown(sLibraryData*) in exitgames.o
ld: symbol(s) not found for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)
This project uses some "exitgames" library which supports social features.
Also this project have some wrapping part of "Brew" c++ codes.
I don't know which part has the problem. tried to figure out and searched a whole day but still couldn't get a clue.
Can anybody give me an advice?
Thank you.
Try running lipo -info exitgames.a from the command line, it should tell you what architectures the framework is made to support.