RDoc 8 breaks Jruby due to rbs dependency.

[jcoyne]

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
current directory:
/home/runner/.rubies/jruby-10.1.0.0/lib/ruby/gems/shared/gems/rbs-4.0.3/ext/rbs_extension
/home/runner/.rubies/jruby-10.1.0.0/bin/jruby extconf.rb
checking for whether -std=gnu99 is accepted as CFLAGS... *** extconf.rb failed
***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers.  Check the mkmf.log file for more details.  You may
need configuration options.
Provided configuration options:
	--with-opt-dir
	--without-opt-dir
	--with-opt-include
	--without-opt-include=${opt-dir}/include
	--with-opt-lib
	--without-opt-lib=${opt-dir}/lib
	--with-make-prog
	--without-make-prog
	--srcdir=.
	--curdir
	--ruby=/home/runner/.rubies/jruby-10.1.0.0/bin/jruby
RuntimeError: The compiler failed to generate an executable file.
You have to install development tools first.
try_do at
/home/runner/.rubies/jruby-10.1.0.0/lib/ruby/stdlib/mkmf.rb:456
try_compile at
/home/runner/.rubies/jruby-10.1.0.0/lib/ruby/stdlib/mkmf.rb:571
with_werror at
/home/runner/.rubies/jruby-10.1.0.0/lib/ruby/stdlib/mkmf.rb:522
try_compile at
/home/runner/.rubies/jruby-10.1.0.0/lib/ruby/stdlib/mkmf.rb:571
try_cflags at
/home/runner/.rubies/jruby-10.1.0.0/lib/ruby/stdlib/mkmf.rb:635
append_cflags at
/home/runner/.rubies/jruby-10.1.0.0/lib/ruby/stdlib/mkmf.rb:641
checking_for at
/home/runner/.rubies/jruby-10.1.0.0/lib/ruby/stdlib/mkmf.rb:942
postpone at
/home/runner/.rubies/jruby-10.1.0.0/lib/ruby/stdlib/mkmf.rb:350
open at
/home/runner/.rubies/jruby-10.1.0.0/lib/ruby/stdlib/mkmf.rb:320
postpone at
/home/runner/.rubies/jruby-10.1.0.0/lib/ruby/stdlib/mkmf.rb:350
open at
/home/runner/.rubies/jruby-10.1.0.0/lib/ruby/stdlib/mkmf.rb:320
postpone at
/home/runner/.rubies/jruby-10.1.0.0/lib/ruby/stdlib/mkmf.rb:346
checking_for at
/home/runner/.rubies/jruby-10.1.0.0/lib/ruby/stdlib/mkmf.rb:941
append_cflags at
/home/runner/.rubies/jruby-10.1.0.0/lib/ruby/stdlib/mkmf.rb:640
           each at org/jruby/RubyArrayNative.java:1729
append_cflags at
/home/runner/.rubies/jruby-10.1.0.0/lib/ruby/stdlib/mkmf.rb:639
         <main> at extconf.rb:14
To see why this extension failed to compile, please check the mkmf.log which can
be found here:
/home/runner/.rubies/jruby-10.1.0.0/lib/ruby/gems/shared/extensions/universal-java/4.0.0/rbs-4.0.3/mkmf.log
extconf failed, exit code 1
Gem files will remain installed in
/home/runner/.rubies/jruby-10.1.0.0/lib/ruby/gems/shared/gems/rbs-4.0.3 for
inspection.
Results logged to
/home/runner/.rubies/jruby-10.1.0.0/lib/ruby/gems/shared/extensions/universal-java/4.0.0/rbs-4.0.3/gem_make.out

cc @headius

[jcoyne]

Probably due to ruby/rbs#2433

[skatkov]

This is probably related #1728

[skatkov]

What kind of version of rdoc are you even running? can you give a steps to reproduce not just logs?

[headius]

If there's a hard dependency on rbs, it will never install on JRuby until we can get an FFI or WASM version finished.

I started that work here but have not had resources to work on it lately: ruby/rbs#2572

[headius]

Short term workaround would be to release a -java platform version of rdoc gem that does not depend on rbs.

Alternatively don't make it a hard dependency and only support rbs signatures when rbs is installed by the user.

[st0012]

https://github.com/ruby/rbs/releases/tag/v4.1.0.pre.2 can already work with JRuby. Can you point rbs in your Gemfile to it for now?

cc @soutaro

[headius]

I see the WASM support was created by Claude and merged just a few days ago. Looks good at a glance other than the usual LLM peculiarities. This won't be the most efficient way to drive the WASM build but it is great to see JRuby support can now be included!

[jcoyne]

@st0012 yes, rbs 4.1.0.pre.2 fixes the issue for me. Thank you.