Unable to install gem under rvm on jruby-9.2.0.0

[mrka124]

gem install rumale got error

Building native extensions. This could take a while...
ERROR:  Error installing rumale:
        ERROR: Failed to build gem native extension.

    current directory: /Users/kietdv/.rvm/gems/jruby-9.2.0.0/gems/numo-narray-0.9.1.6/ext/numo/narray
/Users/kietdv/.rvm/rubies/jruby-9.2.0.0/bin/jruby -r ./siteconf20200222-38612-w78zw1.rb extconf.rb
checking for stdbool.h... RuntimeError: The compiler failed to generate an executable file.
You have to install development tools first.

                 try_do at /Users/kietdv/.rvm/rubies/jruby-9.2.0.0/lib/ruby/stdlib/mkmf.rb:456
                try_cpp at /Users/kietdv/.rvm/rubies/jruby-9.2.0.0/lib/ruby/stdlib/mkmf.rb:587
   block in have_header at /Users/kietdv/.rvm/rubies/jruby-9.2.0.0/lib/ruby/stdlib/mkmf.rb:1091
  block in checking_for at /Users/kietdv/.rvm/rubies/jruby-9.2.0.0/lib/ruby/stdlib/mkmf.rb:942
      block in postpone at /Users/kietdv/.rvm/rubies/jruby-9.2.0.0/lib/ruby/stdlib/mkmf.rb:350
                   open at /Users/kietdv/.rvm/rubies/jruby-9.2.0.0/lib/ruby/stdlib/mkmf.rb:320
      block in postpone at /Users/kietdv/.rvm/rubies/jruby-9.2.0.0/lib/ruby/stdlib/mkmf.rb:350
                   open at /Users/kietdv/.rvm/rubies/jruby-9.2.0.0/lib/ruby/stdlib/mkmf.rb:320
               postpone at /Users/kietdv/.rvm/rubies/jruby-9.2.0.0/lib/ruby/stdlib/mkmf.rb:346
           checking_for at /Users/kietdv/.rvm/rubies/jruby-9.2.0.0/lib/ruby/stdlib/mkmf.rb:941
            have_header at /Users/kietdv/.rvm/rubies/jruby-9.2.0.0/lib/ruby/stdlib/mkmf.rb:1090
                 <main> at extconf.rb:60
*** 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=/Users/kietdv/.rvm/rubies/jruby-9.2.0.0/bin/jruby

To see why this extension failed to compile, please check the mkmf.log which can be found here:

  /Users/kietdv/.rvm/gems/jruby-9.2.0.0/extensions/universal-java-1.8/2.5.0/numo-narray-0.9.1.6/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /Users/kietdv/.rvm/gems/jruby-9.2.0.0/gems/numo-narray-0.9.1.6 for inspection.
Results logged to /Users/kietdv/.rvm/gems/jruby-9.2.0.0/extensions/universal-java-1.8/2.5.0/numo-narray-0.9.1.6/gem_make.out

[yoshoku]

@kietdinh Thank you for your report. Rumale depends on Numo::NArray for linear algebra calculations. Numo::NArray does not support JRuby. Rumale's C-extension also does not support JRuby. Thus, Rumale cannot be used on JRuby.

[mrka124]

Thank you