SciRuby/nmatrix — pull request #97 by cjfuller (2013-06-12 19:37:31+00:00)
Title: Added extra clapack and cblas header check to extconf.rb, which allows install on ubuntu

This commit lets you compile error-free on Ubuntu 13.04 with ATLAS from the package repository using:
```
sudo apt-get install libatlas3-base libatlas-base-dev
bundle install
rake compile
```
without having to set any environment variables or anything else special. (Though if lapack is installed separately from ATLAS, it will still cause problems when trying to load nmatrix in a program.)

I only have access to Ubuntu 13.04 right now, so I haven't tested other versions. To those out there with other Ubuntu versions: does this fix the issue? To those out there with other linux distros or OS X: does this break anything?