firebase_core: Lexical or Preprocessor Issue (Xcode): 'Flutter/Flutter.h' file not found

[GG-themastermind]

Is there an existing issue for this?

• I have searched the existing issues.

Which plugins are affected?

Core

Which platforms are affected?

iOS

Description

I'm not able to build the IOS app.

Lexical or Preprocessor Issue (Xcode): 'Flutter/Flutter.h' file not found
/Users/gg/.pub-cache/hosted/pub.dev/firebase_core-3.10.0/ios/firebase_core/Sources/firebase_core/messages.g.m:14:8

Lexical or Preprocessor Issue (Xcode): 'Flutter/Flutter.h' file not found
/Users/gg/.pub-cache/hosted/pub.dev/firebase_core-3.10.0/ios/firebase_core/Sources/firebase_core/include/firebase_core/FLTFirebasePlugin.h:16:8

Lexical or Preprocessor Issue (Xcode): 'Flutter/Flutter.h' file not found
/Users/gg/.pub-cache/hosted/pub.dev/firebase_core-3.10.0/ios/firebase_core/Sources/firebase_core/include/firebase_core/FLTFirebaseCorePlugin.h:8:8

Could not build the application for the simulator.
Error launching application on iPhone 16 Pro.

Reproducing the issue

flutter create
flutter pub add firebase_core

uncomment the first line in the Podfile and modify to 18.1 (or any other):
platform :ios, '18.1'

flutter run

Firebase Core version

3.10.0

Flutter Version

3.27.2

Relevant Log Output

Lexical or Preprocessor Issue (Xcode): 'Flutter/Flutter.h' file not found
/Users/gg/.pub-cache/hosted/pub.dev/firebase_core-3.10.0/ios/firebase_core/Sources/firebase_core/messages.g.m:14:8


Lexical or Preprocessor Issue (Xcode): 'Flutter/Flutter.h' file not found
/Users/gg/.pub-cache/hosted/pub.dev/firebase_core-3.10.0/ios/firebase_core/Sources/firebase_core/include/firebase_core/FLTFirebasePlugin.h:16:8


Lexical or Preprocessor Issue (Xcode): 'Flutter/Flutter.h' file not found
/Users/gg/.pub-cache/hosted/pub.dev/firebase_core-3.10.0/ios/firebase_core/Sources/firebase_core/include/firebase_core/FLTFirebaseCorePlugin.h:8:8


Could not build the application for the simulator.
Error launching application on iPhone 16 Pro.

Flutter dependencies

Expand Flutter dependencies snippet

dependencies:
flutter:
sdk: flutter

The following adds the Cupertino Icons font to your application.

Use with the CupertinoIcons class for iOS style icons.

cupertino_icons: ^1.0.8
firebase_core: ^3.10.0

Additional context and comments

No response

[SelaseKay]

Hi @GG-themastermind, what Xcode version are you using?

[GG-themastermind]

Hi @GG-themastermind, what Xcode version are you using?

Xcode is version 16.2

[SelaseKay]

Hi @GG-themastermind, I'm unable to reproduce this on my end. Could you try the following:

• Delete Pods and Pofile.lock
• flutter clean.
• futter run.

[GG-themastermind]

I have tried that numerous times already, and unfortunately it does not help.
Also, as you can see it happens to me after I create a completely new project. flutter create

[GG-themastermind]

What else can I provide to troubleshoot this? Cause this is completely stopping our development currently.

[SelaseKay]

Please delete your ios folder, run flutter create . to regenerate it, and then try running flutter run again. Also, could you share your Podfile with me?

[GG-themastermind]

I have tried that already, and that didn't help.

here is my Podfile:

Uncomment this line to define a global platform for your project

platform :ios, '18.1'

CocoaPods analytics sends network stats synchronously affecting flutter build latency.

ENV['COCOAPODS_DISABLE_STATS'] = 'true'

project 'Runner', {
'Debug' => :debug,
'Profile' => :release,
'Release' => :release,
}

def flutter_root
generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'Generated.xcconfig'), FILE)
unless File.exist?(generated_xcode_build_settings_path)
raise "#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure flutter pub get is executed first"
end

File.foreach(generated_xcode_build_settings_path) do |line|
matches = line.match(/FLUTTER_ROOT=(.*)/)
return matches[1].strip if matches
end
raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try deleting Generated.xcconfig, then run flutter pub get"
end

require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)

flutter_ios_podfile_setup

target 'Runner' do
use_frameworks!
use_modular_headers!

flutter_install_all_ios_pods File.dirname(File.realpath(FILE))
target 'RunnerTests' do
inherit! :search_paths
end
end

post_install do |installer|
installer.pods_project.targets.each do |target|
flutter_additional_ios_build_settings(target)
end
end

[SelaseKay]

I'm still unable to reproduce this issue.

[MichaelVerdon]

This looks like it could be an issue with your Flutter installation or project setup. I would recommend trying to run 'flutter doctor' if you have not already or maybe even try reinstalling Flutter itself.