From: Tom Cloyd <tomcloyd@...>
Date: 2008-12-13T12:20:51+09:00
Subject: Re: need quick check on my rubygems install procedure

Tom Cloyd wrote:
> I'm running Kubuntu Linux 8.10 - a fresh install. I'm setting up Ruby 
> now.
>
> I've done this before, but it takes very little for me to be in over 
> my head, so I need a quick review from someone who actually 'has a clue'.
>
> I have just installed Ruby 1.8.7 from the source available at the Ruby 
> website. No problems. I then downloaded from Rubyforge the 
> rubygems-1.3.1.tgz module, unpacked it, and launched its setup.rb 
> file. There was no console response other than a new command line. I 
> assume this is normal.
>
> Then....I issue a gem -v, and get back "1.2.0".
>
> I'm lost at this point. I thought I just installed v. 1.3.1.
>
> "which gem" produces "/usr/bin/gem".
>
> Looking there, I see both a "gem" and a "gem1.9".
>
> Oh boy. Two versions. "gem1.9 -v" also produces "1.2.0". Now I'm 
> really confused. And why "gem1.9"? What's THAT about?
>
> Being very suspicious at this point, I issue "which ruby1.9" and get 
> back "/usr/bin/ruby1.9". "ruby1.9 -v" produces "ruby 1.9.0 (2008-06-20 
> revision 17482) [i486-linux]". This is just nuts. I didn't install 
> this. Where did it come from?
>
> If I'm going to use my new Ruby 1.8.7 and want it to use the latest 
> rubygems, which I presume IS somewhere in my filesystem, what do I 
> need to do? Anything at all?
>
> Can someone please untangle this for me, so I can just get back to 
> work with my ruby learning...?
>
> Thanks (very much!) in advance.
>
> Tom
>
>
>
An update - thought I'd try to install a gem, just to see the response. 
It wasn't good, and I don't know what it means...

$ sudo gem install RedCloth
[sudo] password for tomc:
Building native extensions.  This could take a while...
ERROR:  Error installing RedCloth:
        ERROR: Failed to build gem native extension.

/usr/bin/ruby1.9 extconf.rb install RedCloth
extconf.rb:1:in `require': no such file to load -- mkmf (LoadError)
        from extconf.rb:1:in `<main>'


Gem files will remain installed in 
/var/lib/gems/1.9.0/gems/RedCloth-4.1.1 for inspection.
Results logged to 
/var/lib/gems/1.9.0/gems/RedCloth-4.1.1/ext/redcloth_scan/gem_make.out
tomc@tomc-desktop:~$

I send this along simply thinking it may give additional useful information.

Tom