undefined symbol: pthread_atfork

[Jean-Malan]

Hey Team,

I am running a Rails (6.0.3.4) app on my Mac (M1 Chip). This error is persisting and is killing my builds:

ruby: symbol lookup error: /usr/local/bundle/gems/stackprof-0.2.17/lib/stackprof/stackprof.so: undefined symbol: pthread_atfork

I am really struggling to find where / why this error is happening and I'm not sure if its versioning / compatibility issues that it is running into.

[franck]

Hi @Jean-Malan,

Did you find a solution ?

I have the same issue.

[hugohow]

I have the same issue

[whalesalad]

My current solution has been to eliminate stackprof from the Gemfile since it is typically not a production dependency. I am also experiencing this in a Ruby 2.6.8 / Rails 4.x environment.

[maeve]

Workaround: explicitly add -pthread to the linker flags.

Configure via bundler:

bundle config build.stackprof --with-ldflags=-pthread
bundle install

Or install the gem directly:

gem install stackprof -- --with-ldflags=-pthread

In my case, I was installing stackprof into an ubuntu-based docker image on an arm64 architecture, and had to install the pthreads stubs as a dependency first:

apt-get install libpthread-stubs0-dev