Re: Grab a constant from the OS?

[Andrew Bernard]

Hi Stan,

If you have not worked with Scheme, this may be a fine point, but the system identification function that Thomas showed comes from Guile, the Scheme implementation used by lilypond. So you won’t find pure Scheme tutorials on this function.

Here’s the Guile reference page:

https://www.gnu.org/software/guile/docs/docs-1.8/guile-ref/System-Identification.html#System-Identification

For learning Scheme, there is a light tutorial which is good: Teach Yourself Scheme in Fixnum Days

http://ds26gte.github.io/tyscheme/index.html

As for other ‘external’ variables, you may perhaps want to get environment variables or runtime information, and there are ways to do that also:

https://www.gnu.org/software/guile/manual/html_node/Runtime-Environment.html#Runtime-Environment

Andrew

On 24/03/2016, 11:20, "Stan Mulder" <address@hidden on behalf of address@hidden> wrote:

I'm not sure where external constants come from, like grabbing the current

version of the OS. From lilypond or from scheme? I have not worked with

scheme at all, but if it is from scheme, is there a recommended tutorial

that would help with this? And how can I accomplish the immediate goal?