On Tue, Jun 4, 2013 at 1:30 PM, Thomas Luedeke <lists / ruby-forum.com> wrote:

> I've been googling and getting nowhere on this, and I find it an
> extremely confusing topic - the use of environment variables in Ruby,
> compared to UNIX.
>
> I've converted some obsolescent UNIX scripts (used to perform
> verification and validation of computer codes) into Ruby.  I'm now
> running into the problem that I need to set an environment variable on
> the g95 compiler to get the test cases to run correctly.
>
> So in the UNIX script, they use something like "export
> G95_MINUS_ZERO=true".
>
> How in the world do I implement something like this in Ruby?  Is it as
> simple as:
>
> ENV['G95_MINUS_ZERO'] = "true"


Have you tried it? I don't have g95, but a similar test case worked for me.