Error when building native extensions - Ubuntu 22.04

[studeba]

What went wrong?

**Received a build error when running gem install backup -v 4.4.1 --verbose **

user@domain:/home/app# gem install backup -v 4.4.1 --verbose
HEAD https://api.rubygems.org/api/v1/dependencies
404 Not Found
GET https://api.rubygems.org/prerelease_specs.4.8.gz
304 Not Modified
GET https://api.rubygems.org/specs.4.8.gz
304 Not Modified
/root/.rbenv/versions/2.3.8/lib/ruby/gems/2.3.0/gems/unf_ext-0.0.6/.document
/root/.rbenv/versions/2.3.8/lib/ruby/gems/2.3.0/gems/unf_ext-0.0.6/.gitignore
/root/.rbenv/versions/2.3.8/lib/ruby/gems/2.3.0/gems/unf_ext-0.0.6/Gemfile
/root/.rbenv/versions/2.3.8/lib/ruby/gems/2.3.0/gems/unf_ext-0.0.6/LICENSE.txt
/root/.rbenv/versions/2.3.8/lib/ruby/gems/2.3.0/gems/unf_ext-0.0.6/README.md
/root/.rbenv/versions/2.3.8/lib/ruby/gems/2.3.0/gems/unf_ext-0.0.6/Rakefile
/root/.rbenv/versions/2.3.8/lib/ruby/gems/2.3.0/gems/unf_ext-0.0.6/ext/unf_ext/extconf.rb
/root/.rbenv/versions/2.3.8/lib/ruby/gems/2.3.0/gems/unf_ext-0.0.6/ext/unf_ext/unf.cc
/root/.rbenv/versions/2.3.8/lib/ruby/gems/2.3.0/gems/unf_ext-0.0.6/ext/unf_ext/unf/normalizer.hh
/root/.rbenv/versions/2.3.8/lib/ruby/gems/2.3.0/gems/unf_ext-0.0.6/ext/unf_ext/unf/table.hh
/root/.rbenv/versions/2.3.8/lib/ruby/gems/2.3.0/gems/unf_ext-0.0.6/ext/unf_ext/unf/trie/char_stream.hh
/root/.rbenv/versions/2.3.8/lib/ruby/gems/2.3.0/gems/unf_ext-0.0.6/ext/unf_ext/unf/trie/node.hh
/root/.rbenv/versions/2.3.8/lib/ruby/gems/2.3.0/gems/unf_ext-0.0.6/ext/unf_ext/unf/trie/searcher.hh
/root/.rbenv/versions/2.3.8/lib/ruby/gems/2.3.0/gems/unf_ext-0.0.6/ext/unf_ext/unf/util.hh
/root/.rbenv/versions/2.3.8/lib/ruby/gems/2.3.0/gems/unf_ext-0.0.6/lib/unf_ext.rb
/root/.rbenv/versions/2.3.8/lib/ruby/gems/2.3.0/gems/unf_ext-0.0.6/lib/unf_ext/version.rb
/root/.rbenv/versions/2.3.8/lib/ruby/gems/2.3.0/gems/unf_ext-0.0.6/test/helper.rb
/root/.rbenv/versions/2.3.8/lib/ruby/gems/2.3.0/gems/unf_ext-0.0.6/test/normalization-test.txt
/root/.rbenv/versions/2.3.8/lib/ruby/gems/2.3.0/gems/unf_ext-0.0.6/test/test_unf_ext.rb
/root/.rbenv/versions/2.3.8/lib/ruby/gems/2.3.0/gems/unf_ext-0.0.6/unf_ext.gemspec
Building native extensions. This could take a while...
current directory: /root/.rbenv/versions/2.3.8/lib/ruby/gems/2.3.0/gems/unf_ext-0.0.6/ext/unf_ext
/root/.rbenv/versions/2.3.8/bin/ruby -r ./siteconf20231025-192972-3ckc46.rb extconf.rb
checking for main() in -lstdc++... yes
checking for ruby/encoding.h... yes
creating Makefile
current directory: /root/.rbenv/versions/2.3.8/lib/ruby/gems/2.3.0/gems/unf_ext-0.0.6/ext/unf_ext
make "DESTDIR=" clean
current directory: /root/.rbenv/versions/2.3.8/lib/ruby/gems/2.3.0/gems/unf_ext-0.0.6/ext/unf_ext
make "DESTDIR="
compiling unf.cc
cc1plus: warning: command-line option ‘-Wdeclaration-after-statement’ is valid for C/ObjC but not for C++
cc1plus: warning: command-line option ‘-Wimplicit-function-declaration’ is valid for C/ObjC but not for C++
In file included from /root/.rbenv/versions/2.3.8/include/ruby-2.3.0/ruby/ruby.h:1988,
from /root/.rbenv/versions/2.3.8/include/ruby-2.3.0/ruby.h:33,
from unf.cc:3:
/root/.rbenv/versions/2.3.8/include/ruby-2.3.0/ruby/intern.h:47:33: warning: ISO C++17 does not allow ‘register’ storage class specifier [-Wregister]
47 | void rb_mem_clear(register VALUE*, register long);
| ^
/root/.rbenv/versions/2.3.8/include/ruby-2.3.0/ruby/intern.h:47:45: warning: ISO C++17 does not allow ‘register’ storage class specifier [-Wregister]
47 | void rb_mem_clear(register VALUE*, register long);
| ^~~~
Killed
user@domain:/home/app# linking shared-object unf_ext.so

What steps did you follow?

1. user@domain /home/app# gem install backup -v 4.4.1 --verbose

How is your copy of backup configured?

N/A

Tell us about the computer that runs the backup gem

Change the information below to match the details of your computer

• Operating system: Ubuntu Server 22.04
• Ruby version: 2.3.8

[tomash]

Ruby version: 2.3.8

The latest version of Ruby with which current upstream version of the gem (which is more-or-less 5.0-beta) is installing and running without any issues is 2.4.10, and this only after a small fix in my feature branch: #999
Backup versions 4.x support Ruby 2.3 at most, maybe you can run them with Ruby 2.4.
I suggest you install an older Ruby with ASDF and/or run backup inside Docker.

And yes, those are oooold Ruby versions now 😢

[tomash]

You can run backup with ruby up to 3.1.4 on the feature branch: #1000
3.2 support and beyond will need a new version of ovirt-engine-sdk-ruby gem: #996

[elthariel]

The Killed entry at the end of the log seems to indicate that the build failed for another external and unrelated reasons.

It seems to me there are only warnings