libllhttp-ext.bundle (mach-o file, but is an incompatible architecture (have 'arm64', need 'x86_64h' or 'x86_64'))

Question

I am using macbook pro 2019 running sonoma 14.3.1 (23D60) when I install gems via bundle install, all the gems get installed correctly but on rails s or rails c, I get

(called from <main> at /Users/macbookpro/upwork/solaris/solaris-cloud/vendor/bundle/ruby/3.1.0/bundler/gems/activeadmin-467517368502/lib/active_admin.rb:2)
/Users/macbookpro/upwork/solaris/solaris-cloud/vendor/bundle/ruby/3.1.0/gems/ffi-1.16.3/lib/ffi/dynamic_library.rb:65:in `load_library': Could not open library '/Users/macbookpro/upwork/solaris/solaris-cloud/vendor/bundle/ruby/3.1.0/gems/llhttp-ffi-0.5.0/ext/aarch64-darwin/libllhttp-ext.bundle': dlopen(/Users/macbookpro/upwork/solaris/solaris-cloud/vendor/bundle/ruby/3.1.0/gems/llhttp-ffi-0.5.0/ext/aarch64-darwin/libllhttp-ext.bundle, 0x0005): tried: '/Users/macbookpro/upwork/solaris/solaris-cloud/vendor/bundle/ruby/3.1.0/gems/llhttp-ffi-0.5.0/ext/aarch64-darwin/libllhttp-ext.bundle' (mach-o file, but is an incompatible architecture (have 'arm64', need 'x86_64h' or 'x86_64')), '/System/Volumes/Preboot/Cryptexes/OS/Users/macbookpro/upwork/solaris/solaris-cloud/vendor/bundle/ruby/3.1.0/gems/llhttp-ffi-0.5.0/ext/aarch64-darwin/libllhttp-ext.bundle' (no such file), '/Users/macbookpro/upwork/solaris/solaris-cloud/vendor/bundle/ruby/3.1.0/gems/llhttp-ffi-0.5.0/ext/aarch64-darwin/libllhttp-ext.bundle' (mach-o file, but is an incompatible architecture (have 'arm64', need 'x86_64h' or 'x86_64')). (LoadError)
Searched in <system library path>, /usr/lib, /usr/local/lib, /opt/local/lib

I have tried reinstalling xcode developer tools, I have also updated cocoapods

Answer 1

Looks like the project you're working on came with bundled gems, ie. they were prebuilt, and looks like they were prebuilt for "Apple silicon" and you have Intel. Delete the vendor/bundle directory and try re-running your bundle install.

Answer 2

I faced the same issue and for some reason, bundler installs both versions (arm64 and x86_64) of llhttp-ffi-0.5.0, without being able to pick the right file:

$ bundle install
...
$ ls -l ./vendor/bundle/ruby/3.1.0/gems/llhttp-ffi-0.5.0/ext/                                                                            total 8
-rw-r--r--  1 username  staff  113 Feb 26 11:38 Rakefile
drwxr-xr-x  4 username  staff  128 Feb 26 11:38 aarch64-darwin
drwxr-xr-x  8 username  staff  256 Feb 26 11:38 llhttp
drwxr-xr-x  4 username  staff  128 Feb 26 11:38 x86_64-darwin
$

There's probably a cleaner way to address this, but removing the aarch64-darwin fixed it for me:

$ rm -rf ./vendor/bundle/ruby/3.1.0/gems/llhttp-ffi-0.5.0/ext/aarch64-darwin

Note, the previous version (llhttp-ffi-0.4.0) had the only the file that matched with my architecture installed so the problem wasn't visible:

$ ls -l ./vendor/bundle/ruby/3.1.0/gems/llhttp-ffi-0.4.0/ext                                                                            
total 8
-rw-r--r--  1 username  staff  113 Feb 26 11:43 Rakefile
drwxr-xr-x  8 username  staff  256 Feb 26 11:43 llhttp
drwxr-xr-x  4 username  staff  128 Feb 26 11:43 x86_64-darwin

Hope this helps!