dyld: Symbol not found: _ffi_prep_closure_loc (on Mac)

Question

I did a regular flutter run on my Mac, targeting my iPhone simulator today and got these errors.

Error output from CocoaPods:
↳
    dyld: lazy symbol binding failed: Symbol not found: _ffi_prep_closure_loc
      Referenced from: /Users/toure/.rbenv/versions/2.6.0/lib/ruby/gems/2.6.0/gems/ffi-1.13.1/lib/ffi_c.bundle
      Expected in: /usr/lib/libffi.dylib

    dyld: Symbol not found: _ffi_prep_closure_loc
      Referenced from: /Users/toure/.rbenv/versions/2.6.0/lib/ruby/gems/2.6.0/gems/ffi-1.13.1/lib/ffi_c.bundle
      Expected in: /usr/lib/libffi.dylib

How do you solve the dyld: Symbol not found: _ffi_prep_closure_loc error?

Answer 1

I found a fix buried in a github issue.

Running this on my Mac solved the problem.

gem uninstall ffi
brew reinstall libffi
export LDFLAGS="-L/usr/local/opt/libffi/lib"
export PKG_CONFIG_PATH="/usr/local/opt/libffi/lib/pkgconfig"
gem install ffi

I decided to share this since the error in the title of the issue is different from the one that I got. Hope this can save someone some time.