Compilation error when hermes enabled: 'fmt/compile.h' file not found

Description

I’m trying to enable hermes on iOS, but when I set :hermes_enabled => true in my Podfile I get the following compilation error:

In file included from /Users/guillermodefermin/taxfix/mobile-app-native-deps/ios/Pods/RCT-Folly/folly/Singleton.cpp:35:
/Users/guillermodefermin/taxfix/mobile-app-native-deps/ios/Pods/RCT-Folly/folly/portability/FmtCompile.h:19:10: fatal error: 
      'fmt/compile.h' file not found
#include <fmt/compile.h>
         ^~~~~~~~~~~~~~~
/Users/guillermodefermin/taxfix/mobile-app-native-deps/ios/Pods/RCT-Folly/folly/portability/FmtCompile.h:19:10: note: 
      did not find header 'compile.h' in framework 'fmt' (loaded from
      '/Users/guillermodefermin/Library/Developer/Xcode/DerivedData/Taxfix/Build/Products/Debug-iphonesimulator/fmt')
1 error generated.

My setup:

• I’m using use_frameworks! :linkage => :static (one of the pods requires it)
• I’m not using flipper

The same configuration works with no issues when :hermes_enabled => false

Version

0.66.1

Output of react-native info

info Fetching system and libraries information...
(node:95196) Warning: Accessing non-existent property 'padLevels' of module exports inside circular dependency
(Use `node --trace-warnings ...` to show where the warning was created)
System:
    OS: macOS 12.0
    CPU: (8) x64 Intel(R) Core(TM) i5-8279U CPU @ 2.40GHz
    Memory: 342.60 MB / 16.00 GB
    Shell: 3.1.2 - /usr/local/bin/fish
  Binaries:
    Node: 14.15.5 - ~/.nvm/versions/node/v14.15.5/bin/node
    Yarn: 1.22.10 - ~/.nvm/versions/node/v14.15.5/bin/yarn
    npm: 6.14.11 - ~/.nvm/versions/node/v14.15.5/bin/npm
    Watchman: 4.9.0 - /usr/local/bin/watchman
  Managers:
    CocoaPods: 1.11.2 - /Users/guillermodefermin/.asdf/shims/pod
  SDKs:
    iOS SDK:
      Platforms: iOS 15.0, DriverKit 20.4, macOS 11.3, tvOS 15.0, watchOS 8.0
    Android SDK:
      API Levels: 28, 29, 30
      Build Tools: 28.0.3, 29.0.2, 30.0.2, 31.0.0
      System Images: android-30 | Google APIs Intel x86 Atom, android-30 | Google Play Intel x86 Atom, android-31 | Google APIs Intel x86 Atom_64
      Android NDK: Not Found
  IDEs:
    Android Studio: 3.5 AI-191.8026.42.35.5791312
    Xcode: 13.0/13A233 - /usr/bin/xcodebuild
  Languages:
    Java: 1.8.0_275 - /usr/bin/javac
  npmPackages:
    @react-native-community/cli: Not Found
    react: Not Found
    react-native: 0.66.1 => 0.66.1 
    react-native-macos: Not Found
  npmGlobalPackages:
    *react-native*: Not Found

Steps to reproduce

• Enable hermes by setting: :hermes_enabled => true
• Run pod install
• Build with react-native run-ios or from xcode

Snack, code example, screenshot, or link to a repository

No response

[razor1895]

@wood1986 you could try this solution:

This should solve the RCT-Folly issue.

use_frameworks! :linkage => :static

This solves the fmt.h file not found issue.

    # https://github.com/facebook/react-native/issues/32451
    installer.pods_project.targets.each do |target|
      if target.name == 'RCT-Folly'
        target.build_configurations.each do |config|
          config.build_settings['HEADER_SEARCH_PATHS'] = "$(inherited) ${PODS_ROOT}/fmt/include"
        end
      end
    end

After adding above code to podfile, run pod install and rebuild your project, it’ll be compiled with success.

[cortinico]

@Kudo 's fix on RN 0.69 seems to fix the issue, thanks Kudo 👍

Just a heads up that 0.69.0 doesn’t containt this fix. We’ll be including it inside 69.1 potentially