[PATCH build] List environment variables with usage.

[Trevor Woerner]

On Sat, Aug 7, 2010 at 9:32 AM, Gaetan Nadon <memsize at videotron.ca> wrote:
> Shouldn't the list also includes:

Ha ha! Yes! :-)
That was going to be my next patch :-)

I figured I'd make it available with the '-h' and '--help' options
first, then add the other environment variables.