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I'm trying to install the xively Ruby gem on the Raspberry Pi - http://rubygems.org/gems/xively-rb

However, during install the following occurs:

gem install xively-rb Building native extensions. This could take a while... ERROR: Error installing xively-rb: ERROR: Failed to build gem native extension.

/usr/local/rvm/rubies/ruby-2.0.0-p353/bin/ruby extconf.rb

Gem files will remain installed in /usr/local/rvm/gems/ruby-2.0.0-p353/gems/yajl-ruby-1.2.0 for inspection. Results logged to /usr/local/rvm/gems/ruby-2.0.0-p353/gems/yajl-ruby-1.2.0/ext/yajl/gem_make.out

I'm pretty sure I fixed this issue on Windows by install the dev version of ruby, but executing rvm list shows that I have the correct versions installed:

$ rvm list

rvm rubies

   ruby-1.9.1-p431-dev [ armv6l ]
=* ruby-2.0.0-p353 [ armv6l ]    
   ruby-2.0.0-p353-dev [ armv6l ]

Where =* denotes the currently used ruby version.

How can I correct my setup to install xively?

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Take a look at the log file that got generated when you attempted to compile this Ruby gem. The log file is a little hard to tease out of the above output but it will likely tell you why the compilation of this Gem failed.

$ more /usr/local/rvm/gems/ruby-2.0.0-p353/gems/yajl-ruby-1.2.0/ext/yajl/gem_make.out

A couple of guesses as to why this might be happening:

  • Xively only works with certain versions of Ruby
  • Tools such as gcc or some lower level library may be missing on your system
  • Gem will only build on certain platforms (i.e. might not compile on Raspbery Pi on ARM architecture)

If you find an issue make sure to report back to the maintainer/developer of Xively so that they can fix the underlying issue and make their Gem better!

  • Thanks. I'm pretty sure I checked the log file and it contained "/usr/local/rvm/rubies/ruby-2.0.0-p353/bin/ruby extconf.rb" which I didn't think was very helpful, but I'll double check – barry Jan 7 '14 at 12:35
  • @barry - please pastebin it if you can, I'd like to take a look at it either way. – slm Jan 7 '14 at 13:58
  • Will do - it'll be this evening – barry Jan 7 '14 at 14:25
  • I'm afraid the contents of the log file are simply "/usr/local/rvm/rubies/ruby-2.0.0-p353/bin/ruby extconf.rb" – barry Jan 7 '14 at 19:37
  • @barry - are you doing a gem install xively? I do happen to have a Rasp Pi box so if I have time I could try your command there. I use OpenElec though for my OS – slm Jan 7 '14 at 19:41

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