Re: organizing deep source trees with child packages

[Ludovic Brenta <ludovic@ludovic-brenta.org>]

Simon Wright wrote on comp.lang.ada:
> Ludovic Brenta <ludo...@ludovic-brenta.org> writes:
>> There was a VCS integrated; I used it as part of Rational Apex on
>> Solaris a few years ago.  I think it was slightly different from the
>> original, as it used RCS as a storage back-end for source files and
>> introduced the "subsystem" (consisting of many source files) as the
>> preferred unit of configuration management.  Branching was OK but
>> merging was horrible, as with RCS.
>
> The GNAT 'stand-alone library' is, I think, similar to the subsystem in
> that only some of the units are externally visible. Of course you _may_
> be able to get a similar effect by using private child packages.

No, the "subsystem" in Rational has nothing to do with visibility; it
was only a configuration management entity.  You could declare that a
subsystem A with version number N depended on a subsystem B with
version number M.  There was no mechanism (that I remember) to hide
part of a subsystem from the outside.  And TTBOMK the GNAT 'stand-
alone library' is not about version control or configuration
management, since it is not versioned.

--
Ludovic Brenta.