Version 1.15 seems to have problem with Arm Linux (Raspberry Pi)

[printfinn]

I was upgrading Rails to 6.0.3.6 from 6.0.3.4 on my Raspberry Pi, after bundle update, ffi gem updated to version 1.15.
But it encounters:

symbol lookup error: ***/gems/ffi-1.15.0/lib/ffi_c.so: undefined symbol: pthread_atfork

After I downgrade ffi gem to 1.14.2 (specify it in Gemfile), the problem disappeared.

I'll leave this issue closed, just in case anyone finds the same problem.

[mariuz]

The same issue we have with Graviton instances on AWS

[larskanis]

I think the issue is very similar to scipy/scipy#11323 . The use of pthread_atfork was introduced in ffi-1.15.0, so we probably have to add -lpthread or -pthread to our compiler options.

[adeserg]

Good afternoon.
I'm new to rails but using scaffold I got this error, you could help me solve it. Try to download a better version and delete the last one, but still reinstall it.Beforehand thank you very much.

rails_generate: symbol lookup error: /home/phablet/.rbenv/versions/2.6.7/lib/ruby/gems/2.6.0/gems/ffi-1.15.0/lib/ffi_c.so: undefined symbol: pthread_atfork

[printfinn]

Good afternoon.
I'm new to rails but using scaffold I got this error, you could help me solve it. Try to download a better version and delete the last one, but still reinstall it.Beforehand thank you very much.

rails_generate: symbol lookup error: /home/phablet/.rbenv/versions/2.6.7/lib/ruby/gems/2.6.0/gems/ffi-1.15.0/lib/ffi_c.so: undefined symbol: pthread_atfork

I don't quite get you, but maybe you didn't modify your Gemfile in your rails project, so the ffi gem remained the latest version.
You need to append this line:
gem "ffi", "~> 1.14.2"
to your Gemfile, then run bundle again.

[larskanis]

I'll fix this issue in the next release. Until then you should be able to use ffi-1.15.0 by either:

gem inst ffi -- --with-ldflags=-pthread

or with bundler:

bundle config build.ffi --with-ldflags=-pthread

[printfinn]

I'll fix this issue in the next release. Until then you should be able to use ffi-1.15.0 by either:

gem inst ffi -- --with-ldflags=-pthread

or with bundler:

bundle config build.ffi --with-ldflags=-pthread

Thank you @larskanis !
I used the second method and it works like a charm on my Raspberry Pi!