The [CVS]-hosted sample module, available from http://tcl.sf.net/ ,
is intended primarily to demonstrate to [C] developers 
how to write a [Tcl] [extension] in C 
that can be dynamically [load]ed 
as well as how to structure the directories 
so that someone can use '''configure''' and '''make''' 
to build and install said extension.

In coarser perspective, think of it as a lesson in [how to use C functions from Tcl].

For more background information, read about [TEA] and [TEA2]. 

-----
[[What's the exact URL at SF?]] 

Not exactly the url, but here's the cvsweb view of the sampleextension module:
http://tcl.cvs.sourceforge.net/tcl/sampleextension/

[[The exact URL of what?  SampleExtension?  Modules don't really have an exact URL.  
And for whatever reason, the code's never been released on SF.net so there isn't a tar file there to download.  
Instead, you have to go and visit the nightly cvs snapshots at ftp://ftp.tcl.tk/pub/tcl/nightly-cvs/]] with filename sample-yyyymmdd.tar.gz.

-----
I experienced problem using the ftp server ftp://tcl.tk (time out, eh !).

Solved this by using a mirror http site, such as
http://ftp.cs.pu.edu.tw/Unix/lang/tcl/nightly-cvs/?C=S;O=A
http://ftp2.uk.freebsd.org/sites/ftp.tcl.tk/pub/tcl/nightly-cvs/

Also, take care of the fact that on the cvs repository, the sample extension module is "sampleextension",
where as on the daily snaphsots, the sample extension is called "sample" only.

-----
There is also ftp://www.tcl.tk/pub/tcl/examples/tea/ 
but these are much older examples than what is available in CVS.

----

[Category Package] | 
[Category Porting] |
[Category Foreign Interfaces]