Ruby Bundle Install Not Working. Can't Install Racc

Using my macOS Monterey v12.6, I’m trying to run Bundle Install in my Ruby on Rails projects and it stops working.

This is the message I get when I get after it stops.

Fetching racc 1.6.0
Installing racc 1.6.0 with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    current directory: /Users/myself/.rvm/gems/ruby-2.6.1/gems/racc-1.6.0/ext/racc/cparse
/Users/myself/.rvm/rubies/ruby-2.6.1/bin/ruby -I /Users/myself/.rvm/rubies/ruby-2.6.1/lib/ruby/site_ruby/2.6.0 -r
./siteconf20220930-1192-12lr3he.rb extconf.rb
checking for rb_block_call()... *** 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:
/Users/myself/.rvm/rubies/ruby-2.6.1/lib/ruby/2.6.0/mkmf.rb:467:in `try_do': The compiler failed to generate an executable file.
You have to install development tools first.
        from /Users/myself/.rvm/rubies/ruby-2.6.1/lib/ruby/2.6.0/mkmf.rb:552:in `try_link0'
        from /Users/myself/.rvm/rubies/ruby-2.6.1/lib/ruby/2.6.0/mkmf.rb:570:in `try_link'
        from /Users/myself/.rvm/rubies/ruby-2.6.1/lib/ruby/2.6.0/mkmf.rb:782:in `try_func'
        from /Users/myself/.rvm/rubies/ruby-2.6.1/lib/ruby/2.6.0/mkmf.rb:1069:in `block in have_func'
        from /Users/myself/.rvm/rubies/ruby-2.6.1/lib/ruby/2.6.0/mkmf.rb:959:in `block in checking_for'
        from /Users/myself/.rvm/rubies/ruby-2.6.1/lib/ruby/2.6.0/mkmf.rb:361:in `block (2 levels) in postpone'
        from /Users/myself/.rvm/rubies/ruby-2.6.1/lib/ruby/2.6.0/mkmf.rb:331:in `open'
        from /Users/myself/.rvm/rubies/ruby-2.6.1/lib/ruby/2.6.0/mkmf.rb:361:in `block in postpone'
        from /Users/myself/.rvm/rubies/ruby-2.6.1/lib/ruby/2.6.0/mkmf.rb:331:in `open'
        from /Users/myself/.rvm/rubies/ruby-2.6.1/lib/ruby/2.6.0/mkmf.rb:357:in `postpone'
        from /Users/myself/.rvm/rubies/ruby-2.6.1/lib/ruby/2.6.0/mkmf.rb:958:in `checking_for'
        from /Users/myself/.rvm/rubies/ruby-2.6.1/lib/ruby/2.6.0/mkmf.rb:1068:in `have_func'
        from extconf.rb:6:in `<main>'

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


extconf failed, exit code 1

Gem files will remain installed in /Users/myself/.rvm/gems/ruby-2.6.1/gems/racc-1.6.0 for inspection.
Results logged to /Users/myself/.rvm/gems/ruby-2.6.1/extensions/x86_64-darwin-19/2.6.0/racc-1.6.0/gem_make.out

An error occurred while installing racc (1.6.0), and Bundler cannot continue.
Make sure that `gem install racc -v '1.6.0' --source ''` succeeds before bundling.

In Gemfile:
  rails was resolved to 6.1.5, which depends on
    actioncable was resolved to 6.1.5, which depends on
      actionpack was resolved to 6.1.5, which depends on
        actionview was resolved to 6.1.5, which depends on
          rails-dom-testing was resolved to 2.0.3, which depends on
            nokogiri was resolved to 1.13.3, which depends on

Ruby Version:

ruby 2.6.1p33 (2019-01-30 revision 66950) [x86_64-darwin19]

I tried running rails -v and this is the response to that:

traceback (most recent call last):
        8: from /Users/myself/.rvm/gems/ruby-2.6.1/bin/ruby_executable_hooks:24:in `<main>'
        7: from /Users/myself/.rvm/gems/ruby-2.6.1/bin/ruby_executable_hooks:24:in `eval'
        6: from /Users/myself/.rvm/gems/ruby-2.6.1/bin/rails:23:in `<main>'
        5: from /Users/myself/.rvm/rubies/ruby-2.6.1/lib/ruby/site_ruby/2.6.0/rubygems.rb:297:in `activate_bin_path'
        4: from /Users/myself/.rvm/rubies/ruby-2.6.1/lib/ruby/site_ruby/2.6.0/rubygems.rb:297:in `synchronize'
        3: from /Users/myself/.rvm/rubies/ruby-2.6.1/lib/ruby/site_ruby/2.6.0/rubygems.rb:299:in `block in activate_bin_path'
        2: from /Users/myself/.rvm/rubies/ruby-2.6.1/lib/ruby/site_ruby/2.6.0/rubygems.rb:232:in `finish_resolve'
        1: from /Users/myself/.rvm/rubies/ruby-2.6.1/lib/ruby/site_ruby/2.6.0/rubygems/core_ext/kernel_require.rb:175:in `require'
/Users/myself/.rvm/rubies/ruby-2.6.1/lib/ruby/site_ruby/2.6.0/rubygems/core_ext/kernel_require.rb:175:in `ensure in require': CRITICAL: RUBYGEMS_ACTIVATION_MONITOR.owned?: before false -> after true (RuntimeError)

Anyways, Rails in Gemfile:

gem 'rails', '~> 6.1.4', '>='

I already tried solving the issue by doing the solution from this post in Stack Overflow and it didn’t solve it.

Does anyone know what’s happening and how shall I solve it?

This might be what you’re looking for. If your Xcode version is 14, Ruby that supports Xcode 14 is not released yet, so what you need to do right now is to downgrade your Xcode and command line tools. You can follow the instruction here

1 Like

Thanks so much for the information. It did answered my question and was a helpful explanation.