React Native Installing Ruby Gems

Question

When i run npx react-native init Project for create new React Native project i get this error:

✔ Downloading template
✔ Copying template
✔ Processing template
✖ Installing Ruby Gems
error Fetching gem metadata from https://rubygems.org/........
Resolving dependencies...
Fetching rexml 3.2.6
Installing rexml 3.2.6
Fetching CFPropertyList 3.0.6
Installing CFPropertyList 3.0.6
Fetching concurrent-ruby 1.2.2
Installing concurrent-ruby 1.2.2
Fetching i18n 1.14.1
Installing i18n 1.14.1
Fetching minitest 5.20.0
Installing minitest 5.20.0
Fetching tzinfo 2.0.6
Installing tzinfo 2.0.6
Fetching zeitwerk 2.6.11
Installing zeitwerk 2.6.11
Fetching activesupport 6.1.7.6
Installing activesupport 6.1.7.6
Fetching public_suffix 4.0.7
Installing public_suffix 4.0.7
Fetching addressable 2.8.5
Installing addressable 2.8.5
Fetching httpclient 2.8.3
Installing httpclient 2.8.3
Fetching json 2.6.3
Installing json 2.6.3 with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

current directory:
/Users/qrivnel/Desktop/Project/vendor/bundle/ruby/2.6.0/gems/json-2.6.3/ext/json/ext/generator
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/bin/ruby -I
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0 -r
./siteconf20230924-69529-n3hcgy.rb extconf.rb
creating Makefile

current directory:
/Users/qrivnel/Desktop/Project/vendor/bundle/ruby/2.6.0/gems/json-2.6.3/ext/json/ext/generator
make "DESTDIR=" clean

current directory:
/Users/qrivnel/Desktop/Project/vendor/bundle/ruby/2.6.0/gems/json-2.6.3/ext/json/ext/generator
make "DESTDIR="
compiling generator.c
In file included from generator.c:1:
In file included from ./../fbuffer/fbuffer.h:5:
In file included from
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.0.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/include/ruby-2.6.0/ruby.h:33:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.0.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/include/ruby-2.6.0/ruby/ruby.h:24:10:
fatal error: 'ruby/config.h' file not found
#include "ruby/config.h"
         ^~~~~~~~~~~~~~~
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.0.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/include/ruby-2.6.0/ruby/ruby.h:24:10:
note: did not find header 'config.h' in framework 'ruby' (loaded from
'/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks')
1 error generated.
make: *** [generator.o] Error 1

make failed, exit code 2

Gem files will remain installed in
/Users/qrivnel/Desktop/Project/vendor/bundle/ruby/2.6.0/gems/json-2.6.3 for
inspection.
Results logged to
/Users/qrivnel/Desktop/Project/vendor/bundle/ruby/2.6.0/extensions/universal-darwin-22/2.6.0/json-2.6.3/gem_make.out

An error occurred while installing json (2.6.3), and Bundler cannot continue.
Make sure that `gem install json -v '2.6.3' --source 'https://rubygems.org/'`
succeeds before bundling.

In Gemfile:
  cocoapods was resolved to 1.13.0, which depends on
    cocoapods-core was resolved to 1.13.0, which depends on
      algoliasearch was resolved to 1.27.5, which depends on
        json
✖ Installing Ruby Gems
error Looks like your iOS environment is not properly set. Please go to https://reactnative.dev/docs/environment-setup?os=macos&platform=android and follow the React Native CLI QuickStart guide for macOS and iOS.
info Run CLI with --verbose flag for more details.

I install cocoapods with brew install cocoapods. pod --version 1.13.0

I also tryed sudo gem install cocapods before brew install and i got this: ` Password: Building native extensions. This could take a while... ERROR: Error installing cocoapods: ERROR: Failed to build gem native extension.

current directory: /Library/Ruby/Gems/2.6.0/gems/ffi-1.16.1/ext/ffi_c

/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/bin/ruby -I /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0 -r ./siteconf20230924-70457-cgucg.rb extconf.rb *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options.

Provided configuration options: --with-opt-dir --without-opt-dir --with-opt-include --without-opt-include=${opt-dir}/include --with-opt-lib --without-opt-lib=${opt-dir}/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/bin/$(RUBY_BASE_NAME) --with-ffi_c-dir --without-ffi_c-dir --with-ffi_c-include --without-ffi_c-include=${ffi_c-dir}/include --with-ffi_c-lib --without-ffi_c-lib=${ffi_c-dir}/lib --enable-debug --disable-debug --enable-system-libffi --disable-system-libffi --with-libffi-config --without-libffi-config --with-pkg-config --without-pkg-config /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/mkmf.rb:467:in try_do': The compiler failed to generate an executable file. (RuntimeError) You have to install development tools first. from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/mkmf.rb:546:in block in try_link0' from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/tmpdir.rb:93:in mktmpdir' from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/mkmf.rb:543:in try_link0' from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/mkmf.rb:570:in try_link' from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/mkmf.rb:672:in try_ldflags' from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/mkmf.rb:1832:in pkg_config' from extconf.rb:9:in system_libffi_usable?' from extconf.rb:46:in `'

To see why this extension failed to compile, please check the mkmf.log which can be found here:

/Library/Ruby/Gems/2.6.0/extensions/universal-darwin-22/2.6.0/ffi-1.16.1/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /Library/Ruby/Gems/2.6.0/gems/ffi-1.16.1 for inspection. Results logged to /Library/Ruby/Gems/2.6.0/extensions/universal-darwin-22/2.6.0/ffi-1.16.1/gem_make.out

Answer 1

You need to upgrade the ruby version of your mac. For that:

1. install rbenv and init rbenv

# install rbenv
$ brew install rbenv

# init rbenv bash
$ echo 'eval "$(rbenv init - zsh)"' >> ~/.zshrc
$ source .zshrc

2. download the latest ruby version

# find the latest stable version
$ rbenv install --list

# install the latest version
$ rbenv install 3.2.2

3. make the install version global

$ rbenv global 3.2.2

4. install cocoapods

$ sudo gem install cocoapods

HTH