AWS Route 53 Domain Redirection(forwarding) from https://example.com to https://www.example.com using AWS S3 bucket

I recently encountered a requirement of domain forwarding for our website. We have our domain purchased in AWS route 53 but our website is designed and developed in zoho sites. We did proper CNAME mapping of our domain https://www.example.com in AWS Route53 and our domain https://www.example.com is all working fine.

However we encountered an issue that, when user try to load https://example.com our zoho site was not loading, to make it work we suppose to add domain redirection from https://example.com to https://www.example.com

To achieve domain redirection in AWS route 53, we can use AWS S3 bucket, the steps are given below.

Steps for Domain Redirection (Forwarding) using AWS S3 bucket

Step 1: Create a bucket in s3 -> bucket is nothing but one folder in aws s3 service and bucket name should be same as your domain name now we have to forward example.com to www.example.com so create bucket as example.com

AWS S3 bucket for Domain redirection
AWS S3 bucket for Domain redirection

Step 2: After creating bucket , go to properties section of that bucket

AWS S3 bucket properties
AWS S3 bucket properties

Step 3: under properties section, scroll down to the bottom and enable Static website hosting with below configurations. Choose redirect request option and provide hostname for which requests has to redirect in our case all requests coming to example.com should redirect to www.example.com, so provide host name as www.example.com.

AWS S3 Static hosting domain redirection
AWS S3 Static hosting domain redirection

React-native linking error while upgrading @react-native-firebase/app for use_frameworks podfile configuration

While upgrading react-native-firebase from version 5.x to latest version 17.x, there are some breaking changes done, we have to follow firebase documentation to upgrade to latest version.

While upgrading getting linking errors after following firebase configuration steps given in their documentation

Error: react native fbsdk Showing Recent Messages Undefined symbol: OBJC_CLASS$_RCTComponentEvent

Basically this error is coming because of changes done in podfile as given in firebase documentation a specific step mentioned as Altering CocoaPods to use frameworks

in this step it was mentioned that, Beginning with firebase-ios-sdk v9+ (react-native-firebase v15+) you must tell CocoaPods to use frameworks. Open the file ./ios/Podfile and add this line inside your targets:

use_frameworks!

but by doing above changes, it start affecting to many other libraries and started getting errors mentioned above.

Fix for the linking error

remove use_frameworks! from podfile targets section, instead add below lines in your pod file before your target in pod file

pod 'Firebase', :modular_headers => true
pod 'FirebaseCoreInternal', :modular_headers => true
pod 'GoogleUtilities', :modular_headers => true

Basically we are setting modular headers only for firebase not for all solutions is given in this stack over flow post

yarn install does not create node_modules folder

when I upgraded yarn to latest version 3.4.1, I started facing strange issue in my react-native app. when i run yarn install, it does not throw any error but it ends with lots of warnings and does not create node_module folder

yarn recently introduced alternative installation strategy unveiled in September 2018, which is called as PnP which is nothing but ” Plug’n’Play “, because of this i started facing an issue, yarn install was not creating node_modules folder

yarn install node_modules folder not created – Yarn v3.0.2 Why do not install the node_modules folder

solution to this is in your project main directory, create a file “.yarnrc.yml” and add below line in that file

nodeLinker: node-modules

know more about yarn PnP here and the solution i have mentioned here is also described in this documentation page.

react-native version upgrade – Error: index.js: Cannot find module ‘babel-plugin-r’ React Native

after upgrading react-native-reanimated to latest version, I received babel error as follows

Error: index.js: Cannot find module 'babel-plugin-r' React Native

Solution for Error: index.js: Cannot find module ‘babel-plugin-r’ React Native

1. add below line of code in your babel.config.js file

plugins: [
    [
      '@babel/plugin-transform-runtime',
      {
          absoluteRuntime: false,
          corejs: false,
          helpers: true,
          regenerator: true,
          version: '7.0.0-beta.0',
      },
  ],
    'react-native-reanimated/plugin',
  ],

2. install below packages as dev dependencies

"@babel/core": "7.20.12",
"@babel/plugin-transform-runtime": "7.19.6",
"@babel/preset-env": "7.20.2",
"@babel/runtime": "7.20.13",

React-native migrating react-navigation from version 3.x.x to 6.x.x

While i started upgrading react-native from version 0.59.9 to 0.71.2 there were lot of drastic changes done across many libraries. react-navigation is one such which has some serious drastic changes.

Typical error we get while upgrading is

creating a navigator doesn’t take an argument maybe you are trying to use react navigation api 4

solution to this is

Using react-navigations as given in their documentation. the old code looks as follows for Stack Navigator

const Drawer = createStackNavigator({
MainNav: { screen: MainNav }
});

however the usage is changed now, all navigator functions now doesn’t require an argument , the changed code looks as follows

const DrawerStack = createStackNavigator();
function Drawer() {
  return (
    <DrawerStack.Navigator>
      <DrawerStack.Screen name="MainNav" component={MainNav} />
    </DrawerStack.Navigator>
  );
}

createDrawerNavigator code is also changed in version 6.x

old code looks as follows

const AppNavigator = createAppContainer(createDrawerNavigator({
  Drawer: { screen: Drawer }
},
  {
    drawerPosition: 'right',
    contentOptions: {
      activeTintColor: '#e91e63'
    },
    contentComponent: props => <SideBar {...props} />
  }));

changed createDrawerNavigator looks as follows

const DrawerNavigator = createDrawerNavigator();
const AppNavigator = () => {
  return (
    <DrawerNavigator.Navigator
      drawerPosition='right'
      tabBarActiveTintColor='#e91e63'
      drawerContent={props => <SideBar {...props} />}
    >
      <DrawerNavigator.Screen name="Drawer" component={Drawer} />
    </DrawerNavigator.Navigator>
  );
}

similarly all navigator functions like createBottomTabNavigator, NavigationContainer are updated follow latest version documentation

Upgrading react-native from version 0.59.9 to 0.71.2 build errors could not find compatible versions for pod “GTMSessionFetcher/Core”

While upgrading react-native from version 0.59.9 to 0.71.2, I am facing multiple build errors, no surprise that there is drastic changes happened from 0.59.9 to 0.71.2.

Error : CocoaPods could not find compatible versions for pod “GTMSessionFetcher/Core”

[!] CocoaPods could not find compatible versions for pod “GTMSessionFetcher/Core”:
In Podfile:
RNFBAuth (from ../node_modules/@react-native-firebase/auth) was resolved to 17.0.0, which depends on
Firebase/Auth (= 10.4.0) was resolved to 10.4.0, which depends on
FirebaseAuth (~> 10.4.0) was resolved to 10.4.0, which depends on
GTMSessionFetcher/Core (< 4.0, >= 2.1)

RNGoogleSignin (from `../node_modules/react-native-google-signin`) was resolved to 2.1.1, which depends on
  GoogleSignIn (~> 5.0.0) was resolved to 5.0.2, which depends on
    GTMSessionFetcher/Core (~> 1.1)

[!] Do not use “pod install” from inside Rosetta2 (x86_64 emulation on arm64).

[!] – Emulated x86_64 is slower than native arm64

[!] – May result in mixed architectures in rubygems (eg: ffi_c.bundle files may be x86_64 with an arm64 interpreter)

[!] Run “env /usr/bin/arch -arm64 /bin/bash –login” then try again.

Solution (fix) for CocoaPods could not find compatible versions for pod “GTMSessionFetcher/Core”

add below line on top of your pod file, this should be first line of your pod file

$FirebaseSDKVersion = ‘9.6.0’

Reference: thanks to Stackoverflow post

Upgrading react-native from version 0.59.9 to 0.71.2 build errors The Swift pod `FirebaseCoreInternal` depends upon `GoogleUtilities`Upgrading react-native from version 0.59.9 to 0.71.2 build errors

While upgrading react-native from version 0.59.9 to 0.71.2, I am facing multiple build errors, no surprise that there is drastic changes happened from 0.59.9 to 0.71.2.

Error

[!] The following Swift pods cannot yet be integrated as static libraries:

The Swift pod FirebaseCoreInternal depends upon GoogleUtilities, which does not define modules. To opt into those targets generating module maps (which is necessary to import them from Swift when building as static libraries), you may set use_modular_headers! globally in your Podfile, or specify :modular_headers => true for particular dependencies.

Solution (fix) error for FirebaseCoreInternal depends on GoogleUtilities

Add below lines in your pod file

platform :ios, min_ios_version_supported
….

pod ‘Firebase’, :modular_headers => true
pod ‘FirebaseCoreInternal’, :modular_headers => true
pod ‘GoogleUtilities’, :modular_headers => true


Reference- thanks to stackoverflow post

ReactNative – iOS Xcode 14 + MacOS X Ventura – build errors Duplicate Symbols for Architecture arm64

Building ReactNative Apps is always little hard when there is an Operating System Update along with that Xcode updated. Every time when Xcode is updated to a newer version, Apple make some changes which will start affecting iOS app build in ReactNative.

ReactNative iOS App build errors with Xcode 14 and Mac OS X Ventura

Recently when I updated Mac OS X Ventura, It also forced me to update Xcode to latest version 14. After Xcode update, my ReactNative App started failing with lots of errors. I have ReactNative app which is using RN version v0.59.9, Xcode started throwing linking errors like

42 Duplicate symbols for architecture arm64

the complete error looks as follows

duplicate symbol '_OBJC_CLASS_$_FBSDKBase64' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKBase64.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKBase64.o)
duplicate symbol '_OBJC_METACLASS_$_FBSDKBase64' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKBase64.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKBase64.o)
duplicate symbol '_OBJC_CLASS_$_FBSDKBasicUtility' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKBasicUtility.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKBasicUtility.o)
duplicate symbol '_OBJC_METACLASS_$_FBSDKBasicUtility' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKBasicUtility.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKBasicUtility.o)
duplicate symbol '_OBJC_CLASS_$_FBSDKCrashHandler' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKCrashHandler.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKCrashHandler.o)
duplicate symbol '_OBJC_METACLASS_$_FBSDKCrashHandler' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKCrashHandler.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKCrashHandler.o)
duplicate symbol '_OBJC_CLASS_$_FBSDKLibAnalyzer' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKLibAnalyzer.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKLibAnalyzer.o)
duplicate symbol '_OBJC_METACLASS_$_FBSDKLibAnalyzer' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKLibAnalyzer.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKLibAnalyzer.o)
duplicate symbol '_OBJC_CLASS_$_FBSDKTypeUtility' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKTypeUtility.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKTypeUtility.o)
duplicate symbol '_OBJC_METACLASS_$_FBSDKTypeUtility' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKTypeUtility.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKTypeUtility.o)
duplicate symbol '_OBJC_IVAR_$_FBSDKURLSession._session' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKURLSession.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKURLSession.o)
duplicate symbol '_OBJC_CLASS_$_FBSDKURLSession' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKURLSession.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKURLSession.o)
duplicate symbol '_OBJC_METACLASS_$_FBSDKURLSession' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKURLSession.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKURLSession.o)
duplicate symbol '_OBJC_IVAR_$_FBSDKURLSession._delegateQueue' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKURLSession.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKURLSession.o)
duplicate symbol '_OBJC_IVAR_$_FBSDKURLSession._delegate' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKURLSession.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKURLSession.o)
duplicate symbol '_OBJC_IVAR_$_FBSDKURLSessionTask._handler' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKURLSessionTask.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKURLSessionTask.o)
duplicate symbol '_OBJC_IVAR_$_FBSDKURLSessionTask._loggerSerialNumber' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKURLSessionTask.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKURLSessionTask.o)
duplicate symbol '_OBJC_IVAR_$_FBSDKURLSessionTask._task' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKURLSessionTask.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKURLSessionTask.o)
duplicate symbol '_OBJC_CLASS_$_FBSDKURLSessionTask' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKURLSessionTask.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKURLSessionTask.o)
duplicate symbol '_OBJC_METACLASS_$_FBSDKURLSessionTask' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKURLSessionTask.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKURLSessionTask.o)
duplicate symbol '_OBJC_IVAR_$_FBSDKURLSessionTask._requestStartDate' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKURLSessionTask.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKURLSessionTask.o)
duplicate symbol '_OBJC_IVAR_$_FBSDKURLSessionTask._requestStartTime' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKURLSessionTask.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKURLSessionTask.o)
duplicate symbol '_FBSDKAppEventCity' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKAppEvents.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKUserDataStore.o)
duplicate symbol '_FBSDKAppEventCountry' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKAppEvents.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKUserDataStore.o)
duplicate symbol '_FBSDKAppEventGender' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKAppEvents.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKUserDataStore.o)
duplicate symbol '_FBSDKAppEventZip' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKAppEvents.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKUserDataStore.o)
duplicate symbol '_FBSDKAppEventEmail' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKAppEvents.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKUserDataStore.o)
duplicate symbol '_FBSDKAppEventDateOfBirth' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKAppEvents.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKUserDataStore.o)
duplicate symbol '_FBSDKAppEventState' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKAppEvents.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKUserDataStore.o)
duplicate symbol '_OBJC_CLASS_$_FBSDKUserDataStore' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKUserDataStore.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKUserDataStore.o)
duplicate symbol '_OBJC_METACLASS_$_FBSDKUserDataStore' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKUserDataStore.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKUserDataStore.o)
duplicate symbol '_FBSDKAppEventPhone' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKAppEvents.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKUserDataStore.o)
duplicate symbol '_FBSDKAppEventFirstName' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKAppEvents.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKUserDataStore.o)
duplicate symbol '_FBSDKAppEventLastName' in:
    /Users/xyz/Library/Developer/Xcode/DerivedData/MyProject-bmkdjxadfihkgxdpmjllovjakstn/Build/Products/Release-iphoneos/FBSDKCoreKit/libFBSDKCoreKit.a(FBSDKAppEvents.o)
    /Users/xyz/MyComputer/Development/MyProject/SourceCode/MyBranches/saz_mobile/mobile_rn_dev/sazappmobile/MyProject/ios/Pods/FacebookSDK/FBSDKCoreKit_Basics.framework/FBSDKCoreKit_Basics(FBSDKUserDataStore.o)
ld: 42 duplicate symbols for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

When I started looking for solution, I found multiple solutions, which actually worked for many people, however for me none of those solutions worked.

Solution for Duplicate Symbols for architecture arm64 – which worked for me

Steps to resolve

  1. Open your project in Xcode
  2. Click on Pods project from your project navigator as shown in below diagram
    then select Build Phases and select the project target in which you are getting errors. For me all linking errors were for FBSDKCore, you can find that by seeing the error.

  3. Then from error get the file name for which you are getting duplicate symbol. for example if error has
    duplicate symbol ‘_FBSDKAppEventLastName’ in: /libFBSDKCoreKit.a(FBSDKAppEvents.o)
    Then find file FBSDKAppEvents.m from the search box given in above screenshot.
  4. Find the file and select the file and delete by clicking on delete(-) icon in the Xcode. ( refer below screenshot)
  5. Since in my case there are 42 linking errors, all the errors are coming from more than 4 to 5 different files. I deleted all the files one by one.
  6. This resolved all 42 linking error.

Basically the error appears when same implementation is referenced more than one in the project. Which mean in my case some of the .m files from FBSDKCoreKit are added more than once, it is difficult to find how those files added twice, but usually it happens when libraries are linked through pods as well as manually ( typically in old projects libraries might have also linked using ReactNative link command)

Now question is why Xcode 14 started giving errors? which was not the case earlier with lower version of Xcodes ? this is basically because the latest Xcode checks strictly many things and it starts complaining.

Is it the only solution which fix this issue ? well that I am not sure, there are many more solutions giving in StackOverflow as well as GitHub, some fixes might work for you. Here are those references for you, in case my fix doesn’t work for you 🙂

References:

1. Github Post- duplicate symbols for architecture x86_64 React Ntaive version 0.64 #32016

2. Github Post – duplicate symbols for architecture x86_64 React Ntaive

3. Stack over flow post – Duplicate Symbols for Architecture arm64

Useful ReactJS, NodeJS,Architecture,Programming Tutorials, videos, links

AirBnB ReactJS front-end Performance Fixes

React Performance Fixes on Airbnb Listing Pages, AirBnb worked hard to improve performance of their listing pages, Thanks to their TechBlog which has covered extensive, detailed explanation regarding how they have improved the performance

Reference Link: React Performance Fixes on Airbnb Listing Pages

System Design Resources

System design is a key to any highly scalable, Large scale Softwares, which deals with Entire System Architecture that focus on Performance, scalability, security, stability of the system. Here are few important resource references

Facebook Video Broadcasting: under-the-hood-broadcasting-live-video-to-millions

Netflix Video Encoding at Scale: high-quality-video-encoding-at-scale

Netflix Workflow Orchestration for Microservices: Netflix-Conductor

Practical System Design

YouTube Architecture: youtube-architecture

YouTube scalability 2012: Youtube-Scalability

Distributed Design Patterns: Scalable-system-design-patterns

Circuit Breaker Algorithm: Handling failures in Backend to Backend calls

Uber Rate Limiter: RateLimit

Intra-Service Messaging

AirBnb Idempotency: avoiding-double-payments-in-a-distributed-payments-system

And Many more useful resources are given in below github link

https://github.com/InterviewReady/system-design-resources

Notes On Startup – Ideology of Competition – Building Creative Monopoly

Creative monopoly means new products that benefit everybody and sustainable profits for the creator. Competition means no profit for anybody, no meaningful differentiation and struggle for survival, So why do people believe in competition is healthy?

The answer is competition is not economic concept, its an ideology that pervades our society and distorts our thinking.

We Preach competition, internalise its necessity and enact its commandments and as a result we trap ourselves within it, even though the more we compete, the less we gain, this is the simple truth but we have all been trained to ignore it.

Competition in Education System

Our education system both drives and reflects our obsession with competition, Grades themselves allow precise measurement of each student’s competitiveness.

Students who don’t learn just by sitting still at a desk are made to feel somehow inferior, while children who excel on conventional measures like tests, assignments end up defining their identities and it gets worse as they ascend to higher level of education.

for the privilege of being turned into conformists, students pay hundreds of thousands of rupees as tution fees. Why are we doing this ?

Competition – Marx and Shakespeare models

Marx: People fight because they are different, the greater the differences, the greater conflicts.

Shakespeare: By contrast all combatants look more or less alike, its not clear why they should be fighting, Since they nothing to fight about.

Consider the opening line from “Romeo and Juliet”, Two households are alike, yet they hate each other, eventually they lose sight of why they started fighting in the first place.

In the world of business atleast Shakespeare model proves the superior guide. Inside a firm people became obsessed with their competitors for career advancement. Then the firms themselves become obsessed with their competitors.

Shakespeare model of Competition in Real-world business

Gates and Schmidt that is Microsoft vs Google, they both were in a different world as they started with operating system and search engine respectively. As with all good tragedy, they conflict seems inevitable only in retrospect. As they grew they began to focus on each other and hence we started seeing war like Windows vs Chrome OS, Explorer vs Chrome, Office vs Docs, Surface vs Nexus

Just as a War Costs, it cost Microsoft and Google their dominance: Apple took them all in Jan 2013, Apple market capitalization was $500 billion, while Microsoft and Google together $467 billion.

Image credit ocalastyle.com

Rivalry causes us to over emphasise old opportunities and slavishly copy what was worked in the past

Another Example:

In off 2010 a startup square released a card reader for iPhone, it was a great square shaped product.

Imitators sprung in no time, A Canadian company Netsecure released half moon shaped card reader, Intuit brought Cylindrical card reader, Paypal launched Traingle shaped card reader.

So one gets the sense that Shakespear Saga won’t end until the apes run out of shapes 🙂

Image credit cached.imagescaler.hbpl.co.uk

Competition can make people hallucinate opportunities where none exist.

If you can’t beat the rival, it may be better to merge. Thats whay Paypal and X.com did in late 1999 and that helped them to ride out the dot com crash and then build a successful business.

Reference: Book Zero To One By Peter Thiel

Continue Reading – Startup Thinking – Finding out a Secret to build something new