Hello all

-----Original Message----- From: scipy-user-bounces@scipy.org [mailto:scipy-user-bounces@scipy.org] On Behalf Of Kyle Ferrio Sent: 01 October 2006 00:34 To: SciPy Users Subject: [SciPy-user] Q: Building SciPy for Windows without Cygwindependency?

I want to build a full-up SciPy for MS Windows in line with the Python and SciPy licenses.

Are you planning to do this with MinGW or with the Microsoft compiler?

I noticed the following text in the excellent installation instructions, regarding the choice of compiler:

"Cygwin is required if you want to build ATLAS yourself."

Well, I often build ATLAS myself. And now (implicitly) I want to build ATLAS in a way that is available to SciPy.

So I have two questions:

1. Must ATLAS -- to be used with SciPy -- be built with a dependence on the GPL'ed Cygwin runtime library? (I can't imagine why this would be the case, but I want to test my understanding.)

I've built ATLAS 3.7.11 under Cygwin, AFAIR, this produced a static library that is not linked to the Cygwin runtime.

2. Is the "need" for Cygwin actually just a way to get (extremely convenient) tools like 'ar' which do not infect the ATLAS lib with the GPL?

The need for Cygwin is a requirement of ATLAS's build system, parts of which are written in C and have a very Unix-centric view of the world. Regards, Albert