add more instruction on building s4

[Matthieu Patou]

On 24/03/2010 19:54, Matthias Dieter Wallnöfer wrote:
> Hi Matthieu!
>
> + "./autogen.sh": This script is already described a few lines earlier 
> (in the sense as "if you don't use a packaged version you first need 
> to...")
>
Yeah you're right I didn't noticed it.
> + "make idl_full": You don't really need to use this - it works also 
> without in most cases ("make" should recompile the IDLs when needed). 
> Only under special circumstances (major IDL changes) this could be 
> useful - but then it isn't said that the normal build works - so you 
> probably anyway need the full rebuild.
>
Well for this I'm quite incline to let it because more than once when 
people starts to follow git tree of s4, one day when they try make it 
just don't work because some IDL are not recompiled.
I'll try to propose a new wording soon.

Matthieu.