Suggestion: Consider Crystal language for this effort. It's Ruby-like syntax would make the YJIT more accessible to Rubyists getting involved and contributing and we would gain all the benefits of a modern language, which is the stated...mwlang (Michael Lang)
=begin I encountered the same error when installing to a fresh copy of Ubuntu 8.10 Intrepid Ibex. Turned out ext/zlib has extconf.rb which means its make files get generated from calling "ruby extconf.rb"
mwlang (Michael Lang)02:09 PM Ruby Feature #18481: Porting YJIT to Rust (request for feedback)