(can not require mysql2) rvm stable recently lost the ability to build ruby 'head'

[rubys]

I initially reported this to ruby-lang, but they were right, this is an rvm issue:

https://bugs.ruby-lang.org/issues/8156

On the same machine, I can check out the source from svn, run autoconf, make, make install and run the executables successfully. Minor unrelated note, builds using rvm don't report the svn branch and version number:

$ ruby -v
ruby 2.1.0dev (2013-03-22) [x86_64-linux]

When I build it myself, I see:

$ ruby -v
ruby 2.1.0dev (2013-03-23 trunk 39883) [x86_64-linux]

[envygeeks]

Can you please confirm this is the case with rvm head too, by doing:

rvm get head
rvm reload
rvm install ...

[rubys]

I'm seeing the same problem with rvm head:

$ rvm -v
rvm 1.18.21 (master) by Wayne E. Seguin <wayneeseguin@gmail.com>, Michal Papis <mpapis@gmail.com> [https://rvm.io/]

Not that it provides much additional context, but I originally saw the failure building Rails: http://intertwingly.net/projects/AWDwR4/checkdepot-210/

[rubys]

I've reproduced the problem (using rvm stable) on Ubuntu 12.10, Ubuntu 12.04, and Ubuntu 10.04

[rubys]

More info, in to a request from @mpapis:

$ ruby -rrbconfig -e 'puts RbConfig::CONFIG["CC"]'
gcc

[mpapis]

it's an issue with ruby-head - moving to RVM 1.20 - we will fix it after RVM 1.19.0 release

[mpapis]

scheduled for 1.19.1

[mpapis]

Need to add warning when using rubygems 1.8 on ruby 2.0+