Dear Pierre-Alain,

On 6 May 2014, at 16:24, Pierre-Alain BOURDIL <pabou...@laas.fr> wrote:

> Hi,
> i'd like to compile GAP with the minimal possible setup, ie with smallest 
> possible set of packages.
> I did not find any option in the configure to select the packages to be 
> installed.

GAP distribution is supplied together with packages, so one need not to select 
them for installation. Packages that do not require compilation will be 
available immediately, while some packages have to be compiled, e.g. using the 
script available from http://www.gap-system.org/Download/install.html. 

Now, to use GAP, one must have the package called GAPDoc, otherwise GAP won't 
start. Indeed, GAP will work without all other packages. However, there are 
some packages which extend GAP essentially, and it may be not a useful idea to 
remove them from a GAP installation. These packages may be used in the 
background e.g. to factorise integers or to compute automorphism groups, 
sometimes without even notifying the user that a package had been used. 

May I ask you why are you interested in such minimalistic installation - is it 
a matter of a disk space, or not being able to compile some packages (e.g. 
under OS X) or too time-consuming package compiling process (e.g. on Raspberry 
Pi), or anything else? Which kinds of calculations are expected to run in such 
GAP installation?

> Is there some docs about customizing the GAP install ?

Perhaps you may look at http://www.gap-system.org/Download/INSTALL which is 
also contained in the root directory of your GAP installation.

Hope this helps
Alexander



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