Build Failed with libyaml & psych on Almalinux 8.6

[daBee]

I am using ruby-build 20220630 and attempting version 3.2.2 on Almalinux 8.6. It seems psych is a bit out of date.

[Tue May 02 19:34:33 user3@server_f ~] yum search psych
=========================== Name Matched: psych ==================================
rubygem-psych.x86_64 : A libyaml wrapper for Ruby
rubygem-psych.i686 : A libyaml wrapper for Ruby

/tmp/ruby-build.20230502193059.45504.2taALp/ruby-3.2.2/lib/yaml.rb:3: warning: It seems your ruby installation is missing psych (for YAML output).
To eliminate this warning, please install libyaml and reinstall your ruby.
uh-oh! RDoc had a problem:
cannot load such file -- psych

run with --debug for full backtrace
make: *** [uncommon.mk:598: rdoc] Error 1

BUILD FAILED (AlmaLinux 8.7 using ruby-build 20230428)

Inspect or clean up the working tree at /tmp/ruby-build.20230502193059.45504.2taALp
Results logged to /tmp/ruby-build.20230502193059.45504.log

Last 10 log lines:
*** Fix the problems, then remove these directories and try again if you want.
make[1]: Leaving directory '/tmp/ruby-build.20230502193059.45504.2taALp/ruby-3.2.2'
Generating RDoc documentation
/tmp/ruby-build.20230502193059.45504.2taALp/ruby-3.2.2/lib/yaml.rb:3: warning: It seems your ruby installation is missing psych (for YAML output).
To eliminate this warning, please install libyaml and reinstall your ruby.
uh-oh! RDoc had a problem:
cannot load such file -- psych

Is there a way around this? Any insight appreciated.

[mislav]

Hi, per our suggested build environment, you should install libyaml-devel with your package manager, not "psych".

[daBee]

Added both. Buuuuut, still issues. I'm actually migrating from 8.7 (the actual version) to 9.x.

[mislav]

If you observe the Results logged to line, you will see a file where the full log is. You can inspect that, or share here as a Gist. The log may contain more information.

Additionally, if you cd into the directory printed in the Inspect or clean up the working tree at line, you can find mkmf.log files under various ext subdirectories. If a Ruby extension failed to compile, those log files may contain additional information. If you find something, you are welcome to share. Thanks!

[daBee]

Ya it's reporting the same issue about psych. I'm upgrading to 9.2 but I thought I'd give it a try:

Generating RDoc documentation
/tmp/ruby-build.20230511134331.108518.FhYCYp/ruby-3.2.2/lib/yaml.rb:3: warning: It seems your ruby installation is missing psych (for YAML output).
To eliminate this warning, please install libyaml and reinstall your ruby.
uh-oh! RDoc had a problem:
cannot load such file -- psych

run with --debug for full backtrace
make: *** [uncommon.mk:598: rdoc] Error 1

[dxg]

For anyone struggling to install libyaml-devel in AlmaLinux 8 or 9, libyaml-devel is part of their CodeReady Builder/PowerTools repo which has to be enabled:

AlmaLinux 8:

dnf config-manager --set-enabled powertools

AlmaLinux 9:

dnf config-manager --set-enabled crb

Then:

dnf install libyaml-devel

after which Ruby 3.2 compiles successfully.