I want to enable Hermes for my iOS react native project but I have next error:
In file included from ../ios/Pods/RCT-Folly/folly/Singleton.cpp:35:
../ios/Pods/RCT-Folly/folly/portability/FmtCompile.h:19:10: fatal error: 'fmt/compile.h' file not found
#include <fmt/compile.h>
^~~~~~~~~~~~~~~
My config:
System:
OS: macOS 11.6.1
Binaries:
Node: 12.22.7 - /usr/local/bin/node
npm: 6.14.15 - /usr/local/bin/npm
Watchman: 4.9.0 - /usr/local/bin/watchman
Managers:
CocoaPods: 1.10.1 - /usr/local/bin/pod
SDKs:
iOS SDK:
Platforms: iOS 14.5, DriverKit 20.4, macOS 11.3, tvOS 14.5, watchOS 7.4
npmPackages:
@react-native-community/cli: Not Found
react: 17.0.2 => 17.0.2
react-native: ^0.66.3 => 0.66.3
My Podfile:
platform :ios, '12.0'
require_relative '../node_modules/react-native/scripts/react_native_pods'
require_relative '../node_modules/@react-native-community/cli-platform-ios/native_modules'
use_frameworks!
workspace 'MyWorkspace'
# Default spec repo
source 'https://github.com/CocoaPods/Specs.git'
...
target 'MyTarget' do
project 'MyProject'
config = use_native_modules!
use_react_native!(
:path => config[:reactNativePath],
# to enable hermes on iOS, change `false` to `true` and then install pods
:hermes_enabled => true
)
...
end
After some investigation I found that dynamically linking (use_frameworks!
) causes this problem and if I link pods statically all work OK. But I must use frameworks for my project so how to resolve this issue?
Just set header search paths to fmt
sources directly for RCT-Folly
target in post_install
to resolve this issue:
Podfile:
...
post_install do |installer|
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
end