Error installing fastthread 1.0.7

Question

On Mac OSX 10.10 Yosemite

RVM

$ rvm -v
rvm 1.26.10 (master) by Wayne E. Seguin <[email protected]>, Michal Papis <[email protected]> [https://rvm.io/]

Ruby

$ rvm list

rvm rubies

 * ruby-1.9.2-p320 [ x86_64 ]
=> ruby-1.9.3-p551 [ x86_64 ]
   ruby-2.0.0-p451 [ x86_64 ]
   ruby-2.1.1 [ x86_64 ]

Issue

$ gem install fastthread -v '1.0.7'
Building native extensions.  This could take a while...
ERROR:  Error installing fastthread:
    ERROR: Failed to build gem native extension.

    /Users/joel/.rvm/rubies/ruby-1.9.3-p551/bin/ruby -r ./siteconf20150217-53934-1vamxar.rb extconf.rb
extconf.rb:13: Use RbConfig instead of obsolete and deprecated Config.

make  clean
Makefile:81: *** missing separator.  Stop.

make
Makefile:81: *** missing separator.  Stop.

make failed, exit code 2

Gem files will remain installed in /Users/joel/.rvm/gems/ruby-1.9.3-p551/gems/fastthread-1.0.7 for inspection.
Results logged to /Users/joel/.rvm/gems/ruby-1.9.3-p551/extensions/x86_64-darwin-14/1.9.1/fastthread-1.0.7/gem_make.out

Any help or pointer is most welcome.

Answer 1

fastthread only works on MRI. It replaces/hooks into the private internal implementation details of MRI's green threads implementation. It does not work on any other Ruby implementation. In particular, it won't work on YARV, which you are using, because YARV has a completely different threading implementation based on native OS threads, not green threads.

Note that maintenance on MRI ended on July 31st, 2014. You really shouldn't be using MRI anymore. Plus, MRI only implements Ruby 1.8, whose maintenance also ended July 31st, 2014.