fcgi.so: undefined symbol: rb_secure

[Michael Cardillo]

Ubuntu release: 22.04
Package Version: 0.9.2.1-2build6
Expected behavior: No error message when using "require 'fcgi'"
Actual behavior:

irb(main):003:0> require 'fcgi'
Your FCGI gem does not contain the FCGI shared library, running pure ruby instead
=> true

irb(main):004:0> require 'fcgi.so'
<internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:85:in `require': /usr/lib/aarch64-linux-gnu/ruby/vendor_ruby/3.0.0/fcgi.so: undefined symbol: rb_secure - /usr/lib/aarch64-linux-gnu/ruby/vendor_ruby/3.0.0/fcgi.so (LoadError)
        from <internal:/usr/lib/ruby/vendor_ruby/rubygems/core_ext/kernel_require.rb>:85:in `require'
        from (irb):4:in `<main>'
        from /usr/lib/ruby/gems/3.0.0/gems/irb-1.3.5/exe/irb:11:in `<top (required)>'
        from /usr/bin/irb:23:in `load'
        from /usr/bin/irb:23:in `<main>'

Root cause: rb_secure is not available in Ruby 3.0+

Proposed fix:
Place guards around rb_secure calls, similar to this FreeBSD patch.
https://cgit.freebsd.org/ports/commit/?id=d82f8cc4f0c6dae23e41880fe66e7b6df6c36e8b

[Michael Cardillo (mcardillo55)]

This is also resolved in upstream version 0.9.2.2.