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XCode Version: Version 7.2 (7C68)
Building for PhoneGAP IOS
Commands used: 

xcodebuild -project HelloCordova.xcodeproj -scheme HelloCordova -configuration Release -sdk iphonesimulator IDENTIFIER=com.kony.SyncApp build

It used to work well before upgrading Xcode after upgrading to 7.2 , i am facing this issue. And same wokring form XCODE UI Problem with command line build

Error Info:

fatal error: too many errors emitted, stopping now [-ferror-limit=] 20 errors generated.

** BUILD FAILED **

The following build commands failed:
    ProcessPCH /Users/konysync/Library/Developer/Xcode/DerivedData/HelloCordova-gyroiomjvclmgtfewwtckeoypgfd/Build/Intermediates/PrecompiledHeaders/CordovaLib_Prefix-almeazhzuslzcvewimbluxlrnwby/CordovaLib_Prefix.pch.pch CordovaLib_Prefix.pch normal armv7 objective-c com.apple.compilers.llvm.clang.1_0.compiler
    ProcessPCH /Users/konysync/Library/Developer/Xcode/DerivedData/HelloCordova-gyroiomjvclmgtfewwtckeoypgfd/Build/Intermediates/PrecompiledHeaders/CordovaLib_Prefix-bvlrmrstkahcccfcihrhcdumeenk/CordovaLib_Prefix.pch.pch CordovaLib_Prefix.pch normal arm64 objective-c com.apple.compilers.llvm.clang.1_0.compiler

(2 failures)

found some links , but those links did not help.
Apple LLVM Compiler 3.1 error clang
Unsupported compiler 'com.apple.compilers.llvm.clang.1_0' selected for architecture 'x86_64' on Xcode 7 Beta 2

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6
  • What are the actual errors? The "fatal error: too many errors emitted, ..." comes after the detailed error messages. We need those details. Commented Feb 1, 2016 at 8:56
  • Not able to add logs here. Logs shared in below link, please check pastebin.com/eXgaLRy4 Commented Feb 1, 2016 at 10:26
  • Well here we are #error architecture not supported. Do you understand what that means? Commented Feb 1, 2016 at 10:28
  • No, i didnt is it 16 bit or 32 bit Commented Feb 1, 2016 at 11:08
  • Well that's just the bitsize. These days the architecures are armv7, arm64, x86 and x86_64. So that's ARM CPUs (devices) and Intel CPUs (simulators). Looks like you are using the wrong architecture which could have happened when upgrading to Xcode 7.2 You'll need to check the supported architectures in the project build settings. Commented Feb 1, 2016 at 11:11

4 Answers 4

Reset to default
9

Clear the cache of pod with

rm -rf ~/Library/Caches/CocoaPods
rm -rf Pods
rm -rf ~/Library/Developer/Xcode/DerivedData/*
pod deintegrate
pod setup

Change flipper version in pod file:

use_flipper!({ 'Flipper-Folly' => '2.5' })

And delete the project's Pods directory. The location of it is project directory > ios > Pods. Then in the project directory > ios location, install pod with pod install And

react-native run-ios

in project directory.

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1 Comment

I encountered the same error and I only removed all spaces in the path of the project and then every thing works fine
1

This is a bug introduced in Xcode 7.2 (and still not fixed as of 7.2.1), see https://openradar.appspot.com/23857648 It seems that xcodebuild is not setting correctly the ARCH and PLATFORM_NAME variables when invoked with -sdk iphonesimulator.

There are two known workarounds at the moment, both involve passing extra flags to xcodebuild:

1) Pass the -destination flag, eg:

xcodebuild [...] -sdk iphonesimulator -destination 'platform=iOS Simulator,name=iPhone 6'

2) Override the PLATFORM variable, eg:

xcodebuild [...] -sdk iphonesimulator PLATFORM_NAME=iphonesimulator
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1 Comment

-destination 'platform=iOS Simulator,name=iPhone 6' works for me! Thanks!
0

I had this error after upgrading to React Native 0.68.x AppDelegate.m changed to AppDelegate.mm

  1. You have to do this: https://github.com/software-mansion/react-native-reanimated/issues/841#issuecomment-636297029 open the project in XCode, then navigate to Build Phases, in Compile Sources remove the AppDelegate.m file and add AppDelegate.mm instead.

  2. If it is not already renamed: Open XCode, rename AppDelegate.m to AppDelegate.mm in the Project Navigator

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-3

i have tried to resolve this error many times and follows multiple steps of every one but not worked for me after that i deleted my build folder from project ios directory like react-native-project>ios>Build folder it worked for me.

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